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2023 Powerwall installation manual
Powerwall 2 AC Installation Manual with Backup Gateway 2 For the latest Powerwall installation documents in all supported languages, visit: www.tesla.com/support/powerwall To secure the full 10-year product warranty, Powerwall must be registered by completing the commissioning process and sending system information to Tesla. Product Speciffcations All speciffcations and descriptions contained in this document are veriffed to be accurate at the time of printing. However, because continuous improvement is a goal at Tesla, we reserve the right to make product modiffcations at any time. The images provided in this document are for demonstration purposes only. Depending on product version and market region, details may appear slightly difierent. Errors or Omissions To communicate any inaccuracies or omissions in this document, reach out to your Tesla Account Manager. ©2022 TESLA, INC. All rights reserved. All information in this document is subject to copyright and other intellectual property rights of Tesla, Inc. and its licensors. This material may not be modiffed, reproduced or copied, in whole or in part, without the prior written permission of Tesla, Inc. and its licensors. Additional information is available upon request. The following are trademarks or registered trademarks of Tesla, Inc. in the United States and other countries: Tesla Tesla Motors Powerwall All other trademarks contained in this document are the property of their respective owners and their use herein does not imply sponsorship or endorsement of their products or services. The unauthorized use of any trademark displayed in this document or on the product is strictly prohibited. Electronic Device: Do Not Throw Away Proper disposal of batteries is required. Refer to local codes for disposal requirements. For Private Households: Information on Disposal for Users of WEEE This symbol on the product(s) and / or accompanying documents means that used electrical and electronic equipment (WEEE) should not be mixed with general household waste. For proper treatment, recovery and recycling, please take this product(s) to designated collection points where it will be accepted free of charge. Alternatively, in some countries, you may be able to return your products to your local retailer upon purchase of an equivalent new product. Disposing of this product correctly will help save valuable resources and prevent any potential negative efiects on human health and the environment, which could otherwise arise from inappropriate waste handling. Please contact your local authority for further details of your nearest designated collection point. Penalties may be applicable for incorrect disposal of this waste, in accordance with you national legislation. For Professional Users in the European Union If you wish to discard electrical and electronic equipment (EEE), please contact your dealer or supplier for further information. For Disposal in Countries Outside of the European Union This symbol is only valid in the European Union (EU). If you wish to discard this product please contact your local authorities or dealer and ask for the correct method of disposal. General Warnings and Information.................3 Speciffcations..........................................................6 Powerwall Speciffcations....................................................6 Backup Gateway 2 Speciffcations...................................9 Registering Powerwall........................................10 Site Requirements and Pre-Installation Guidance...................................................................11 Powerwall and Backup Gateway 2 Installation Requirements..........................................................................11 Powerwall Physical Requirements..................................12 Powerwall Identiffcation.....................................................13 Powerwall Optimum Temperature Range...................13 Preparing for Installation...................................14 In the Powerwall Box...........................................................14 In the Powerwall Accessory Bag...................................14 In the Backup Gateway 2 Box..........................................16 In the Backup Gateway 2 Accessory Bag..................16 Required Tools.......................................................................17 Required Supplies.................................................................17 Service Parts, Orderable Parts, and Accessory Kits 18 Powerwall 2 Accessory Kits and Orderable Parts...18 Backup Gateway 2 Service Parts, Orderable Parts, and Accessories...................................................................19 STEP 1: Plan the Installation Site.....................21 Choose a Location................................................................21 Choose Side or Rear Cable Entry for Powerwall......21 Choose Backup Gateway Cable Entry..........................21 Plan the Electrical Service Connection to Backup Gateway....................................................................................21 Plan Wiring Method.............................................................21 Plan Distance Between Components...........................22 STEP 2: Mount Powerwall and the Backup Gateway..................................................................23 Anchor the Powerwall Mounting Bracket...................23 Mount Powerwall on the Bracket...................................24 Mount the Backup Gateway............................................28 STEP 3: Conffgure the Backup Gateway for Wiring......................................................................30 Remove Neutral-Ground Bonding Strap from Backup Gateway if Not Installed as Service Equipment..............................................................................30 STEP 4: Make AC Power Connections..........31 Install Main Breaker in Backup Gateway......................31 Make AC Power Connections to Supply and Load Panels........................................................................................31 Install Optional Internal Panelboard in the Backup Gateway...................................................................................33 STEP 5: Make Communications Connections ....................................................................................35 Connect Powerwall to the Backup Gateway.............35 Panel Limit Feature...........................................................38 Install Optional Remote Disable Switch.....................40 STEP 6: Install Energy Metering for the System.....................................................................44 About Energy Metering....................................................44 Site and Solar Metering for Backup Gateway 2.......44 Install Tesla 100 A CTs......................................................45 STEP 7: Complete the Installation................46 Plan Internet Connection for the Backup Gateway 2 ....................................................................................................46 Close the Wiring Compartments and Turn the System On..............................................................................46 STEP 8: Commission the System..................48 Commission the System....................................................48 Finish and Demonstrate the Installation.....................48 Troubleshooting...................................................................48 Technical Support................................................................48 Maintenance..........................................................................48 Appendix A: Powerwall Mounting Details.49 Powerwall Space Requirements....................................49 Mounting Bracket Anchoring Details...........................50 Appendix B: Wiring Reference......................54 Powerwall Wiring.................................................................54 Backup Gateway 2 Wiring................................................55 Backup Gateway 2 Communication Wiring...............57 Acceptable Circuit Breakers............................................58 Appendix C: System Wiring Diagrams........59 Overview.................................................................................59 Whole-Home Backup.........................................................59 Partial-Home Backup.........................................................62 Appendix D: Conffgure Energy Metering...66 Appendix E: Installing a Neurio Energy Meter........................................................................67 Neurio Energy Meter Overview......................................67 Wireless Communication to the Backup Gateway..67 Wired Communication to the Backup Gateway......68 Meter Voltage Taps.............................................................68 Voltage Tap and Current Transformer Connections.... ....................................................................................................69 Meter Placement and CT Wire Lengths......................70 Current Transformer Placement....................................70 Current Transformer Orientation....................................71 Current Transformer Capacity.........................................71 Metering Split-phase Solar with a Single CT.............73 Installing the Meter..............................................................73 Neurio W2 Meter Installation Troubleshooting........77 Appendix F: Feature Notes.............................79 Conffguring Site Limits......................................................79 Conffguring Conductor Export Limits.........................79 Load Shedding.....................................................................80 Appendix G: Installation Troubleshooting.82 Accessing the Powerwall User Interface.....................82 Updating Firmware.............................................................82 Conffguring Energy Meters..............................................82 Reset the Backup Gateway..............................................83 Power Cycle the System...................................................83 Appendix H: Installing the Cold Weather Kit ....................................................................................84 Appendix I: Multi-Powerwall Installations..86 Electrical Equipment Sizing and Overcurrent Protection...............................................................................86 Multi-Powerwall Installations with the Stack Kit......93 In the Powerwall Stack Kit..............................................93 Required Tools.....................................................................93 Site Requirements.............................................................94 Installation Instructions....................................................95 Step 1: Prepare for Installation.....................................95 Step 2: Choose a Wiring Option.................................96 Step 3: Prepare for Concealed Wiring......................97 Step 4: Join the Powerwall Units................................99 Step 5: Wire the Powerwall Units.............................104 Step 6: Close the Wiring Compartments and Replace the Covers........................................................106 Step 7: Turn On and Commission the System......107 Appendix J: Inverter Settings.......................108 Appendix K: Revision Log...............................113 GENERAL WARNINGS AND INFORMATION ATTENTION: Read this entire document before installing or using Powerwall. Failure to do so or to follow any of the instructions or warnings in this document can result in electrical shock, serious injury, or death, or can damage Powerwall, potentially rendering it inoperable. NOTE: On detection of abnormal condition for voltage or frequency conditions or in response to a detected unintentional island, Tesla AC Powerwall opens the disconnecting means to stop delivering power. Important Safety Instructions This manual contains important instructions for the Tesla Powerwall 2 AC and Backup Gateway that must be followed during installation and maintenance of the system. Symbols Used CAUTION: indicates a hazardous situation which, if not avoided, could result in minor injury or damage to the equipment. RISK OF ELECTRIC SHOCK: indicates components that present risk of electrical shock. WARNING: indicates a hazardous situation which, if not avoided, could result in injury or death. CAUTION, RISK OF ELECTRIC SHOCK, ENERGY STORAGE TIMED DISCHARGE. Discharge time is 5 minutes from de-energization. NOTE: indicates an important step or tip that leads to best results, but is not safety or damage related. BIDIRECTIONAL TERMINAL: Indicates location of combined input/output connector on the equipment. REFER TO OPERATING INSTRUCTIONS: indicates that user should refer to operating or installation instructions before proceeding. PROTECTIVE EARTH CONDUCTOR TERMINAL: Indicates location of grounding connection on the equipment. General Information WARNING: Read this entire document before installing or using Powerwall. Failure to do so or to follow any of the instructions or warnings in this document can result in electrical shock, serious injury, or death, or may damage Powerwall, potentially rendering it inoperable. WARNING: A battery can present a risk of electrical shock, ffre, or explosion from vented gases. Observe proper precautions. 3Powerwall 2 AC Installation Manual WARNING: Powerwall installation must be carried out only by a competent electrician who is certiffed by Tesla and who has been trained in dealing with low voltage electricity. WARNING: Powerwall is heavy. Use of lift equipment is recommended. WARNING: Use Powerwall only as directed. WARNING: Do not use Powerwall if it is defective, appears cracked, broken, or otherwise damaged, or fails to operate. WARNING: Before beginning the wiring portion of the installation, ensure that Powerwall is switched ofi, and lock out any associated circuit breakers and disconnect switches (if applicable for the installation). WARNING: Do not attempt to open, disassemble, repair, tamper with, or modify Powerwall. Powerwall and its components are not user serviceable. Batteries in Powerwall are not replaceable. Contact Tesla Support for guidance on repairs. WARNING: To protect Powerwall and its components from damage when transporting, handle with care. Do not impact, pull, drag, or step on Powerwall. Do not subject Powerwall to any strong force. To help prevent damage, leave Powerwall in its shipping packaging until it is ready to be installed. WARNING: Do not insert foreign objects into any part of Powerwall. WARNING: Do not expose Powerwall or its components to direct flame. WARNING: Powerwall is not intended for installation in habitable spaces or living spaces in dwelling units. WARNING: Do not install Powerwall near heating equipment. WARNING: Do not immerse Powerwall or its components in water or other fluids. WARNING: Install Powerwall and Backup Gateway in a location that prevents damage from flooding. WARNING: Operating or storing Powerwall in temperatures outside its speciffed range might cause damage to Powerwall. WARNING: Do not expose Powerwall to ambient temperatures above 60°C (140°F) or below -30°C (-22°F). CAUTION: Do not use solvents to clean Powerwall, or expose Powerwall to flammable or harsh chemicals or vapors. CAUTION: Do not use fluids, parts, or accessories other than those speciffed in this manual, including use of non-genuine Tesla parts or accessories, or parts or accessories not purchased directly from Tesla or a Tesla-certiffed party. GENERAL WARNINGS AND INFORMATION 4Powerwall 2 AC Installation Manual CAUTION: Do not place Powerwall in a storage condition for more than one (1) month, or permit the electrical feed on the Powerwall to be severed for more than one (1) month, without placing Powerwall into a storage condition in accordance with Tesla’s storage speciffcations. CAUTION: Do not paint any part of Powerwall, including any internal or external components such as the exterior shell or casing. CAUTION: Do not connect Powerwall directly to photovoltaic (PV) solar wiring. CAUTION: When installing Powerwall in a garage or near vehicles, keep it out of the driving path. If possible, install Powerwall on a side wall and/or above the height of vehicle bumpers. CAUTION: Avoid installing Powerwall and Backup Gateway in direct sunlight. CAUTION: Ensure that no water sources are above or near Powerwall or Backup Gateway, including downspouts, sprinklers, or faucets. CAUTION: Ensure that snow does not accumulate around Powerwall or Backup Gateway. CAUTION: Avoid installing the Powerwall and Backup Gateway where it will be exposed to direct sunlight or ambient temperatures greater than 35°C. GENERAL WARNINGS AND INFORMATION 5Powerwall 2 AC Installation Manual SPECIFICATIONS Powerwall Speciffcations Tesla AC Powerwall with Gateway 2.0 is certiffed for Performance category A & B with Abnormal categories II & III. For full compliance to IEEE 1547-2018 and IEEE 1547.1-2020 GW.0 with SMC shall be used with ACPW. Performance Speciffcations AC Voltage (Nominal)120/240 V Feed-In Type Split Phase Grid Frequency 60 Hz Total Energy1 14 kWh Usable Energy1 13.5 kWh Real Power, Max Continuous (On-Grid)5 kW (charge and discharge) Real Power, Max Continuous (Ofi-Grid)7 kW Real Power, Peak (10 s, Ofi-Grid/Backup)10 kW (charge and discharge) Apparent Power, Max Continuous 5.8 kVA (charge and discharge) Apparent Power, Peak (10 s, Ofi-Grid/Backup)10 kVA (charge and discharge) Maximum Supply Fault Current 10 kA Maximum Output Fault Current 42 A Overcurrent Protection Device 30 A Surge withstand Voltage on AC Ports 4kV Surge withstand Voltage on Communication Ports 2kV Radiated RF Immunity 35V/m Imbalance for Split-Phase Loads 100% Power Factor Output Range +/– 1.0 adjustable Power Factor Range (full-rated power)+/– 0.85 Internal Battery DC Voltage 50 V Round Trip Efficiency1,2 90% Connection / Reconnection Range 0 - 600 s 1 Values provided for 25°C (77°F), 3.3 kW charge/discharge power. 2 AC to battery to AC, at beginning of life. 6Powerwall 2 AC Installation Manual Mechanical Speciffcations Dimensions3 1150 mm x 753 mm x 147 mm (45.3 in x 29.6 in x 5.75 in) Weight3 114 kg (251.3 lbs) Mounting Floor or wall mount 3Dimensions and weight difier slightly if manufactured before March 2019. Contact Tesla for additional information. Environmental Speciffcations Operating Temperature –20°C to 50°C (–4°F to 122°F)4 Recommended Temperature 0°C to 30°C (32°F to 86°F)4 Operating Humidity (RH)Up to 100%, condensing Storage Conditions –20°C to 30°C (–4°F to 86°F) Up to 95% RH, non-condensing State of Energy (SoE): 25% initial Maximum Elevation 3000 m (9843 ft) Environment Indoor and outdoor rated Enclosure Type NEMA 3R Ingress Rating IP67 (Battery & Power Electronics) IP56 (Wiring Compartment) Wet Location Rating Yes Noise Level @ 1m < 40 dBA at 30°C (86°F) 4Performance may be de-rated at operating temperatures below 10°C (50°F.) SPECIFICATIONS 7Powerwall 2 AC Installation Manual Compliance Information Speciffcation Standard certiffed Safety UL 1741:2021 Ed.3 Inverters, Converters, Controllers and Interconnection System Equipment for use with Distributed Energy Resources Power Conversion Equipment [CSA C22.2#107.1:2016 Ed.4] Grid Interoperability UL 1741SB Inverters, Converters, Controllers and Interconnection System Equipment for use with Distributed Energy Resources IEEE 1547: 2018 - IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces IEEE 1547.1:2020 IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces Supplement SA to UL 1741 - Inverters, Converters, Controllers and Interconnection System Equipment for use with Distributed Energy Resources [UL 1741:2010 Ed.2 (Supplement SA)+R:15Feb2018] With the source requirements document (SRD) v2.0–Hawaii Rule No. 14H Interconnection of Distributed Generating Facilities with the Company’s Distribution System Efiective: 07/01/2020 Electric Rule No.21 Generating Facility Interconnections Efiective: June 30, 2018 CSA C22.3#9:2020 Ed.2 Interconnection of distributed energy resources and electricity supply systems Energy Storage Energy Storage Systems and Equipment [ANSI/CAN/UL 9540:2020 Ed.2] EMC IEEE 1547.1 (2020), IEEE C37.90.1:2012, IEEE C62.41.2:2002 SPECIFICATIONS 8Powerwall 2 AC Installation Manual Backup Gateway 2 Speciffcations Performance Speciffcations AC Voltage (Nominal)120/240 V Feed-In Type Split Phase Grid Frequency 60 Hz Current Rating 200 A Maximum Input Short Circuit Current 10 kA1 Overcurrent Protection Device 100-200A; Service Entrance Rated1 Overvoltage Category Category IV AC Meter Revenue accurate (+/– 0.2 %) 1 When protected by Class J fuses, Backup Gateway 2 is suitable for use in circuits capable of delivering not more than 22 kA symmetrical amperes. Mechanical Speciffcations Dimensions 26 x 16 x 6 inches (660 x 411 x 149 mm) Weight 45 lb (20.4 kg) Mounting Wall mount, Semi-flush mount Environmental Speciffcations Operating Temperature –4°F to 122°F (–20°C to 50°C) Operating Humidity (RH)Up to 100%, condensing Maximum Elevation 9843 ft (3000 m) Environment Indoor and outdoor rated Enclosure Type NEMA 3R SPECIFICATIONS 9Powerwall 2 AC Installation Manual REGISTERING POWERWALL Tesla Powerwall comes with a warranty whose term depends on the connection of Powerwall to the Internet. To secure the full 10-year warranty for Powerwall, it must be reliably connected to the Internet to allow remote ffrmware upgrades from Tesla. If an Internet connection is not established or is interrupted for an extended period, and Tesla is unable to contact the owner, the warranty may be limited to 4 years. To ensure that the owner can receive the full 10-year warranty, be sure to complete the commissioning process so that registration information is sent to Tesla. For more information, refer to the Powerwall Warranty for your region at www.tesla.com. 10Powerwall 2 AC Installation Manual SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE Powerwall and Backup Gateway 2 Installation Requirements Powerwall comes with a separate Backup Gateway to enable integration with the electrical grid and generation like solar systems (refer to Compatibility Matrix for information on what can be connected with Powerwall). The Backup Gateway communicates with the system by means of wireless and wired connections. Wiring and conduit (where required) must be provided by the installer and installed to comply with local codes. AC isolation and interconnection requirements between the Powerwall system and the electrical panel are subject to local codes. Ensure that the installation meets local isolation and interconnection requirements. All U.S. and Canada electrical installations must be done in accordance with local codes and the National Electric Code (NEC) ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1. WARNING: All Powerwalls in the system must be installed on the ‘Backup’ ('Home') side of the Backup Gateway’s relay. WARNING: When Powerwall is installed in a dwelling unit, ffre detection and protection equipment should be installed in accordance with local building and ffre codes. WARNING: Do not connect the Backup Gateway in any way that bypasses or short-circuits its relay. WARNING: Do not connect the Backup Gateway to the source side only or to the load side only. The Backup Gateway must have both source and load connections, and must be wired in compliance with local codes. CAUTION: The Backup Gateway 2 is rated for 10 kA maximum supply fault current. Where local regulation requires a 10 kA rating, all breakers employed in circuit with the Backup Gateway 2 should also be rated to 10 kA. CAUTION: Before installing, disconnecting, and/or adjusting current transformers for metering, ensure the circuits being measured are not energized and the system is completely powered down. Failure to de-energize the system may compromise operator and equipment safety. CAUTION: The Manual Override switch inside the product may not be used to simulate a grid outage or take home ofi-grid. A main isolation switch should be installed upstream of the Backup Gateway for testing the system and for service purposes. NOTE: All installations must conform to the laws, regulations, codes, and standards applicable in the jurisdiction of installation. The Backup Gateway must be wall-mounted and can be conffgured for cable entry at the top, bottom, rear, or sides of the enclosure. It requires adequate clearance for installation and cabling or conduit. Wiring and conduit (where required) must be provided by the installer and the installation must comply with local codes and UL514B requirements. 11Powerwall 2 AC Installation Manual Figure 1. Powerwall 2 AC and Backup Gateway 2 Dimensions Powerwall Physical Requirements Powerwall can be mounted on a floor or wall, and includes a mounting bracket to support either conffguration. Mounting Powerwall must follow the guidance outlined in this document. Mounting requirements based on wall type are provided in Appendix A: Powerwall Mounting Details on page 49. Powerwall requires adequate clearance for installation, cabling, and airflow. Do not install anything above Powerwall that limits access to the unit or that might fall and damage the unit. Do not mount Powerwall horizontally or upside down. NOTE: Powerwall has a pump and fan that produce a gentle hum during operation, comparable to a typical refrigerator. The noise level depends on the ambient temperature and the power level of operation. Consider these noise levels when choosing where to install Powerwall. SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE 12Powerwall 2 AC Installation Manual Powerwall Identiffcation Newer Powerwalls have slightly difierent dimensions for mounting-bracket height. Powerwalls may be easily identiffed by part number and by comparing the back of the Powerwall (see ffgure below). Figure 2. Powerwall 2 Identiffcation by Mounting Bracket Height Powerwall Optimum Temperature Range Powerwall is rated to operate in temperatures from –4°F to 122°F (-20°C to 50°C). However, for best performance Tesla recommends installing Powerwall in locations with ambient temperature between 32°F to 86°F (0°C to 30°C) year round. When outside this optimum temperature range, charge/discharge power may be reduced and Powerwall will utilize its thermal control system more frequently to maintain battery cell temperature which will reduce the energy efficiency of the system. Systems operating ofi-grid for long periods (>4 hours) in cold weather may need to curtail PV, and reduce energy used for pre-conditioning. • For cold climates Tesla strongly recommends installing Powerwall indoors when possible (particularly when long outages are expected). Where Powerwall is installed in a cool location, Tesla ofiers a cold weather kit to avoid the loss in energy efficiency of the system; see Appendix H: Installing the Cold Weather Kit on page 84 for instructions to install the cold weather kit. • For hot climates Tesla recommends keeping Powerwall out of direct sunlight, though this is not a requirement. Additionally, if stored in a cold environment (e.g. below 0°C) before installation, it may take several hours for Powerwall to raise its internal temperature using pre-conditioning. Tesla recommends storing Powerwall in a warm location prior to installation to help efficiently commission and test the system. SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE 13Powerwall 2 AC Installation Manual PREPARING FOR INSTALLATION In the Powerwall Box In the Powerwall Accessory Bag Powerwall Accessory Bag: Tesla P/N 1104517-00-x 1. Wiring compartment cover with (4) screws 2. (1) AC power harness 3. (3) Wago 2-position lever nuts 4. (1) 4-pin terminal block connector 5. (1) 4-pin terminal block connector with 120-Ohm terminating resistor 6. (1) 32-mm reducing washer 7. (2) 25-mm reducing washers 14Powerwall 2 AC Installation Manual 8. (1) 35-mm rubber grommet 9. (1) drillable threaded cable gland PREPARING FOR INSTALLATION 15Powerwall 2 AC Installation Manual In the Backup Gateway 2 Box In the Backup Gateway 2 Accessory Bag 1. (1) Main circuit breaker adhesive label 2. (1) Tesla 100 A CT 3. (4) Sealing washers 4. (1) Tesla CT extension cable harness (10 ft / 3 m) 5. (1) Owner’s Guide PREPARING FOR INSTALLATION 16Powerwall 2 AC Installation Manual Required Tools General Installation Tools • Personal protective equipment (safety glasses, gloves, protective footwear) • Drill with applicable drill bits • Torque screwdriver with 1/4-inch bit holder and T20 Torx bit • Small (2 mm) flathead screwdriver (for wiring connector spring terminals) • Socket wrench with 8mm hex socket • Wire strippers/cutters for 24 AWG to 250 kcmil (0.2 mm2 to 120 mm2) wires • Installation tools (level, stud sensor, tape measure, pencil, painter's tape, flashlight) • Multimeter and Loop Impedance Tester • Digital camera or smartphone for documenting the installation Powerwall Installation Tools • Large (5 mm) flathead driver bit (for Powerwall Earth terminal) • Lift equipment capable of lifting and supporting 125 kg up to 1.5 m • Ratcheting strap to secure Powerwall to lift equipment WARNING: Powerwall is heavy. Wear appropriate personal protective equipment (such as gloves and protective footwear) when handling the unit. Only a sufficient number of trained movers should lift Powerwall. Use of lift equipment is recommended. Backup Gateway Installation Tools • Torque wrench with 1/4-, 3/8-, and 5/16-inch Allen bit (for Backup Gateway power connections) • Socket wrench with 8 mm (5/16-inch) hex socket Required Supplies • Powerwall mounting bracket hardware (see Appendix A: Powerwall Mounting Details on page 49) • Backup Gateway mounting hardware • Conduit or raceway (depending on local electrical requirements) • Conduit adapters (necessary for cable entry into Powerwall wiring compartment and Backup Gateway) • Minimum 300 V rated 4-conductor (twisted pair optional) or double-insulated (with one twisted pair) shielded copper (Cu) cable (for communication connection between Powerwall and the Backup Gateway) • Minimum 600 V rated copper (Cu) cable (for power connections to Powerwall and the Backup Gateway) PREPARING FOR INSTALLATION 17Powerwall 2 AC Installation Manual Service Parts, Orderable Parts, and Accessory Kits Powerwall 2 Accessory Kits and Orderable Parts NOTE: Some of the parts and kits listed below may not be orderable by Channel Partners; for a list of parts and kits that can be ordered by Channel Partners, please see the Powerwall Pricing Guide on Partner Portal. Powerwall Accessory Kits Part Number Name Description 1107999-00-x Powerwall 2 Mounting Bracket Additional Powerwall Wall Mounting Bracket (1 bracket is included with every Powerwall) 1104517-00-x Powerwall 2 Accessory Bag (North America) Additional Powerwall 2 accessory bag for North American market (1 accessory bag is included with every Powerwall) 1112154-00-x Powerwall 2 Stack Kit Powerwall 2 Stack Kit for stacked Powerwall installs Neurio W1 Meter and Components NOTE: Neurio W1 accessories are not compatible with the Neurio W2 meter, and vice versa. Part Number Name Description 1112484-02-x Neurio W1 Meter Kit with 200 A CTs Neurio W1 Meter Kit with (2) Neurio 200 A CTs 1112477-00-x Neurio W1 Additional 200 A CTs Additional Neurio W1 200 A CTs (2 count) 1447689-00-x Neurio W1 800 A CTs Neurio W1 800 A CTs (2 count) 1125547-03-x Neurio W1 CT Extension Wires Neurio W1 CT Extension Wires 1129625-00-x Neurio W1 CT Y Splitter Neurio W1 CT Y-Splitter to allow for paralleling CT connections 1133339-00-x Neurio RS-485 meter communication harness Neurio RS-485 cables that connect from meter to Gateway to ensure a hardwired connection 1738922-00-x Neurio W1 800 A Metering Kit (1) Neurio W1 meter kit with (2) Neurio W1 800 A CTs Neurio W2 Meter and Components NOTE: Neurio W2 accessories are not compatible with the Neurio W1 meter, and vice versa. Part Number Name Description 1112484-04-x Neurio W2 Meter Kit with 200 A CTs Neurio W2 Meter Kit with (2) Neurio 200 A CTs 1622277-00-x Neurio W2 Additional 200 A CTs Additional Neurio W2 200 A CTs (2 count) 1622289-00-x Neurio W2 CT Extension Wires Neurio W2 CT Extension Wires 1622286-00-x Neurio W2 CT Y Splitter Neurio W2 CT Y-Splitter to allow for paralleling CT connections PREPARING FOR INSTALLATION 18Powerwall 2 AC Installation Manual Part Number Name Description 1133339-00-x Neurio RS-485 meter communication harness Neurio RS-485 cables that connect from meter to Gateway to ensure a hardwired connection EP-PW-BUNDLE-5 Neurio W2 Accessory Bundle 5 (1) Neurio W2 Meter Kit with (2) W2 200A CTs, (2) additional Neurio W2 200A CTs, (4) Neurio W2 CT extension wires, (2) Neurio W2 Y-Splitters EP-PW-BUNDLE-6 Neurio W2 Accessory Bundle 6 (2) Neurio W2 200A CTs, (2) Neurio W2 CT extension wires, (1) Neurio W2 Y-Splitter Backup Gateway 2 Service Parts, Orderable Parts, and Accessories Part Number Name Description 1467316-00-x Tesla 100 A CT Additional Tesla 100 A CT (1 count) 1467274-00-x Tesla 100 A CT Extension Tesla 100 A CT Extension (10 ft / 3 m) 1529623-00-x Internal Panelboard Kit Optional internal panelboard kit with wire jumpers and breaker hold-down bar 1549184-00-x 2" Conduit Hub Kit 2” conduit hub and bolts 1549184-01-x 1.25" Conduit Hub Kit 1.25” conduit hub and bolts 1534278-50-x Gateway 2 Top Hatch Service replacement top hatch for the Gateway 2 1486318-01-x Gateway 2 Glass Door Service replacement glass door for the Gateway 2 Figure 3. Internal Panelboard Kit PREPARING FOR INSTALLATION 19Powerwall 2 AC Installation Manual Figure 4. Conduit Hub Kit PREPARING FOR INSTALLATION 20Powerwall 2 AC Installation Manual STEP 1: PLAN THE INSTALLATION SITE Choose a Location Choose a wall capable of supporting the full weight of Powerwall, with one of the following characteristics: • Wood studs at regular intervals • Plywood sheeting of sufficient thickness • Solid concrete or masonry • Metal studs of sufficient gauge If floor-mounting Powerwall, choose a level surface adjacent to a wall space that meets the above requirements. Make sure the area is isolated from hazards that could damage Powerwall, such as vehicle traffic or flooding. Consider the spacing requirements for Powerwall (see Appendix A: Powerwall Mounting Details on page 49). Choose Side or Rear Cable Entry for Powerwall Determine whether cables will be routed into Powerwall from the side or the back of the unit. • For side cable entry, a conduit fftting or cable gland must be used to seal the entry into the wiring compartment. • For back cable entry, a rubber grommet or cable gland is used to seal the entry into the wiring compartment. NOTE: If Powerwall is mounted on a wall with studs spaced 24 inches apart, cable entry from the back of Powerwall may be blocked. Choose Backup Gateway Cable Entry Determine whether cables will be routed into the Backup Gateway from the top, bottom, or rear of the enclosure. NOTE: For cable entry at the top of the Backup Gateway enclosure, a Tesla Top Hub must be used in order to maintain enclosure ingress protection. Plan the Electrical Service Connection to Backup Gateway The Backup Gateway is service entrance rated. When installed at the service entrance, appropriate overcurrent protection must be installed in the Backup Gateway. The Backup Gateway can accommodate a main circuit breaker between 100 and 200 A. Breaker sizing and installation must comply with the National Electric Code. Plan Wiring Method Calculate the amount and size of appropriate cable needed for the installation, based on ffll limits and local code requirements. An adapter may be required between the entry into the Powerwall wiring compartment and the conduit. 21Powerwall 2 AC Installation Manual Plan Distance Between Components Follow the table below for maximum distances between system components. Wire gauge must meet local codes and in some circumstances wire gauge requirements change based on distance. Refer to Appendix B: Wiring Reference on page 54 for wire gauge requirements. Distance to Measure Maximum Cable Length Backup Gateway to Powerwall unit(s)*150 ft (45 m) for 16 AWG (1.5 mm2) wire 82 ft (25 m) for 18 AWG (0.8 mm2) wire Neurio Energy Meter to Backup Gateway (RS485 wired connection) 164 ft (50 m) Backup Gateway to Internet router (wired Ethernet connection)328 ft (100 m) *Total length of communications cable, including daisy-chained connections, through last Powerwall in chain CAUTION: Failure to follow minimum cable size and length requirements may result in intermittent or unreliable operation of the Powerwall system. In systems that do not meet these minimum requirements, performance issues may arise even after successful commissioning. Maximum Tesla CT Extension Tesla 100 A CTs Maximum Extension Length Using Tesla 100 A CT Extension (10 ft/3 m) (Tesla P/N 1467274-00-x)Up to 12.5 ft (3.8 m) Using 20 AWG (0.5 mm2) or larger twisted pair conductors Up to 330 ft (100 m) Maximum Neurio CT Extension Neurio W1 200 A CTs (Remote Metering)Maximum Extension Length Using Neurio CT extension harness (Tesla P/N 1125547-03-x)Up to 15 ft (4.5 m) Using 0.2-1.5 mm2 shielded twisted pair with drain wire Up to 50 ft (15 m) Neurio W2 200 A CTs (Remote Metering)Maximum Extension Length Using Neurio CT extension harness (Tesla P/N 1622289-00-x)Up to 15 ft (4.5 m) STEP 1: PLAN THE INSTALLATION SITE 22Powerwall 2 AC Installation Manual STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY Anchor the Powerwall Mounting Bracket NOTE: For detailed instructions on mounting Powerwall, including minimum spacing requirements, refer to Appendix A: Powerwall Mounting Details on page 49. 1. Using a drill and level, mount the bracket to the selected wall. See Appendix A: Powerwall Mounting Details on page 49 for additional details on the type and number of fasteners to use. Figure 5. Mounting Bracket Dimensions 23Powerwall 2 AC Installation Manual 2. For back cable entry installations, drill a hole in the wall corresponding to the back cable entry port. Table 1. Location of Back Cable Entry Port in Relation to Bracket 1092170-XX-H and lower 1092170-XX-J and higher 2012070-XX-B and lower 2012070-XX-C and higher 3012170-XX-Y (all) Mount Powerwall on the Bracket 1. Switch ofi Powerwall. WARNING: Switching ofi will ensure Powerwall does not grid form. However, AC voltage may still be present from the grid. Ensure all equipment is safely de-energized before working. STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 24Powerwall 2 AC Installation Manual 2. Remove the left side cover from Powerwall. 3. Prepare Powerwall for side or back cable entry: a. For side cable entry installations, remove the side cable entry door from the left side cover. STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 25Powerwall 2 AC Installation Manual b. For back cable entry installations, remove the plug from the back cable entry port and place it in the side cable entry port. NOTE: The plug must always be placed in either the back or side cable entry port. 4. Using lift equipment, position Powerwall close to the wall and adjust the height of Powerwall until its mounting cleats are just above the flanges on the bracket. 5. Lower Powerwall until the top cleat engages the top flange on the bracket and the bottom cleat aligns with the bottom flange. 6. With both cleats engaged, lower Powerwall onto the bracket. An audible click will be heard when the cleats are seated in the bracket and the locking mechanism at the center of the top flange clicks into place. NOTE: To remove Powerwall from the mounting bracket, place a thin piece of sheet metal between the Powerwall unit and the bracket to compress the locking mechanism, and lift the Powerwall straight up. STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 26Powerwall 2 AC Installation Manual Figure 6. Mounting Powerwall on the Bracket 7. If floor-mounting Powerwall, use shims to ensure that Powerwall is level. The unit should be level within +/– 2 degrees side-to-side and within +/– 5 degrees front-to-back. 8. If wall-mounting Powerwall, remove the feet from the unit. NOTE: Step 8 applies only to updated versions of Powerwall (see Powerwall Identification on page 13). STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 27Powerwall 2 AC Installation Manual Mount the Backup Gateway 1. Using a hole saw, drill out the necessary cable access holes from the Backup Gateway. All cable knockouts are ¾” in diameter but can be expanded to 2”. Figure 7. Cable Access Drill Guides 2. If using top cable entry, remove the Top Hub Cap from the enclosure and install the Tesla Top Hub (Tesla P/N 1549184-00-A (2-inch kit) or Tesla P/N 1549184-01-A (1.25-inch kit)). STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 28Powerwall 2 AC Installation Manual 3. Using a drill and level and ¼" screws, mount the Backup Gateway enclosure. The provided sealing washers must be used when mounting the Backup Gateway. NOTE: Mount the Backup Gateway vertically, in the orientation shown in Backup Gateway Enclosure Mounting Holes on page 29. Do not mount the Backup Gateway enclosure horizontally or upside down. Figure 8. Backup Gateway Enclosure Mounting Holes 4. Locate the Backup Gateway serial number on the label on the dead front cover. Record the serial number for reference. STEP 2: MOUNT POWERWALL AND THE BACKUP GATEWAY 29Powerwall 2 AC Installation Manual STEP 3: CONFIGURE THE BACKUP GATEWAY FOR WIRING Remove Neutral-Ground Bonding Strap from Backup Gateway if Not Installed as Service Equipment Proper earth connection and Neutral-to-Ground bonding is required for safe operation of the Powerwall system and for compliance with local code requirements. When installed as Service Equipment, the factory-installed Neutral-Ground Bonding Strap bonds neutral to ground, as shown in Figure 8. The Neutral-Ground Bonding Strap must only be removed if not installed as Service Equipment, or for test purposes. Use a 7/16-inch socket to remove the two nuts attaching the Neutral-Ground Bonding Strap. If replacing the Neutral-Ground Bonding Strap, torque nuts to 65 in-lbs (7.4 Nm). Figure 9. Neutral-Ground Bonding Strap Location WARNING: To ensure safe operation in Backup Mode, a local earth connection must be present on the site such as by earth rod or ground electrode. Connection of earth rod must comply with local codes. 30Powerwall 2 AC Installation Manual STEP 4: MAKE AC POWER CONNECTIONS Install Main Breaker in Backup Gateway When installed as Service Equipment, a main breaker must be installed. Eaton CSR or BW type breakers may be used; see Eaton Breakers on page 58 for compatible breakers. 1. Remove the S1 and S2 supply lugs using a 7/16-inch hex socket. 2. Install the main breaker, torqueing the two S1 and S2 nuts to 65 in-lbs (7.4 N-m) using a 7/16-inch hex socket. NOTE: Main breaker wire lug cover caps are recommended any time a main breaker is installed in the Backup Gateway Figure 10. Removing the S1 and S2 Supply Lugs to Install a Main Breaker Make AC Power Connections to Supply and Load Panels In each of the following steps: • Strip the ends of the wires and insert into the corresponding Backup Gateway terminal lugs. • Using an appropriate torque tool, tighten the lugs according to the table on the following page. • Use copper or aluminum wire only. 1. Connect the supply conductors to the Backup Gateway Supply terminals according to Conductor Connections on page 32 and the accompanying table. 2. Connect the home load panel conductors to the Backup Gateway Backup terminals according to Conductor Connections on page 32 and the accompanying table. 3. For partial home backup with Non-Backup loads under 100 A, a Non-Backup panel can be connected. Connect the conductors (L1, L2, Neutral, and Ground) from the Non-Backup panel to the Backup Gateway’s Non-Backup terminals according to Conductor Connections on page 32 and the accompanying table. 31Powerwall 2 AC Installation Manual Any circuits connected here will not be powered when disconnected from the grid. During on-grid operation, these circuits are still metered by the internal site metering with no additional metering hardware required. WARNING: Always ensure all equipment is safely de-energized and locked out prior to working, to prevent risk of electric shock. To avoid shock hazard, never power on the system without a connection to Earth at the Gateway. WARNING: Incorrect wiring of AC conductors presents a risk of electrical shock or damage to equipment. Before energizing the system, ensure all connections are made correctly according to the instructions in this document and in accordance with local wiring codes and regulations. Refer to Appendix B: Wiring Reference on page 54 for all wiring requirements and recommendations, including wire colors and gauges. Refer to Appendix C: System Wiring Diagrams on page 59 for example system wiring diagrams. Table 2. Conductor Connections Supply Connections Home Load and Backup Connections Non-Backup Connections Terminal Wire Gauge Tool Size Strip Length Torque Supply Lugs (S1, S2)6 AWG – 250 kcmil 5/16-in hex 1 ¼-inch (32 mm)275 in-lbs (31 N-m) Non-Backup Lugs (L1, L2)14 – 2 AWG 3/16-in hex ¾-inch (20 mm)120 in-lbs (14 N-m) Backup Lugs (L1, L2)6 AWG – 250 kcmil 5/16-in hex 1 ¼-inch (32 mm)275 in-lbs (31 N-m) Large Neutral Lugs 6 AWG – 250 kcmil 5/16-in hex 1 ¼-inch (32 mm)275 in-lbs (31 N-m) Large Earth Lugs 14 AWG – 2/0 3/16-in hex ¾-inch (20 mm)120 in-lbs (14 N-m) Design Considerations Refer to Appendix F: Feature Notes on page 79 for information on the Backup Gateway load shedding feature, which can be used to interrupt any 60 V circuit when operating ofi-grid. STEP 4: MAKE AC POWER CONNECTIONS 32Powerwall 2 AC Installation Manual Install Optional Internal Panelboard in the Backup Gateway The Internal Panelboard kit (Tesla P/N 1529623-00-x) may be installed in the Backup Gateway 2 and connected to either the Backup or the Non-Backup terminals by feeding a two pole breaker on the bussing. 1. Mount the Internal Panelboard into the Backup Gateway using the provided mounting screws (M5x12 hex bolts). 2. Connect the internal panelboard to either the backup (2a) or non-backup (2b) lugs: a. Connect the L1 and L2 lugs on the bottom of the Internal Panelboard to the Backup lugs via the provided 105’C-rated CU wire jumpers. STEP 4: MAKE AC POWER CONNECTIONS 33Powerwall 2 AC Installation Manual b. Connect the Non-Backup Lugs to an Eaton BR breaker on the bussing (up to 100 A). NOTE: The Eaton BR breakers are required when connecting the internal panelboard to the Non-Backup lugs to accommodate for wire gauge difierence (see Backup Gateway 2 Wiring on page 55 for wire gauge ranges). 3. Once all breakers have been installed, install the breaker hold-down if installing any back-fed or generation breakers on the bussing. Mount the hold-down bracket using the provided (2) M5-0.8x12 Philips head screws. 4. Place the adhesive circuit label on the deadfront to label circuits. Design Considerations The Internal Panelboard is 200 A-rated and supports 6x 1-inch breaker spaces (12 circuits) using Eaton BR branch circuit breakers up to 125 A maximum. The Powerwall connection to the Backup Gateway always requires a 30 A circuit breaker. This breaker serves as circuit protection for the Powerwall. Breaker sizing and installation must comply with the National Electric Code. STEP 4: MAKE AC POWER CONNECTIONS 34Powerwall 2 AC Installation Manual STEP 5: MAKE COMMUNICATIONS CONNECTIONS Connect Powerwall to the Backup Gateway NOTE: Refer to Appendix B: Wiring Reference on page 54 for wiring speciffcations. Depending on local requirements, Powerwall wiring can be installed through conduit or through a cable gland. Refer to local codes to determine wiring requirements. If necessary, use the included 1 in-to-32 mm or 1 in-to-25 mm reducing washers to adapt the cable gland to the wiring compartment inlet. 1. (Conduit installations only) Run conduit as needed and attach the conduit fftting to the inlet of the wiring compartment. The wiring compartment inlet accepts a standard 1-inch conduit fftting. 2. (Conduit installations only) If the conduit connector does not have an integrated bushing, affix the provided insulation bushing to the conduit opening on the inside of the wiring compartment. NOTE: Ensure that all conduit joints and outlets have smooth edges so that wiring is not damaged as it is run through the conduit. 3. Run the 4-conductor communication cable, the AC power conductors, and equipment grounding conductor from the Backup Gateway through the conduit or cable gland and pull them into the Powerwall wiring compartment. 4. At the Powerwall, strip the ends of the AC conductors and attach them to the corresponding leads on the AC power harness. 5. Plug the AC power harness into the AC connector in the Powerwall wiring compartment. Ensure that the connector clicks into place. Figure 11. Powerwall 2 AC Power Harness Connection 35Powerwall 2 AC Installation Manual 6. On each end of the 4-conductor communication cable, strip and insert the wires into the provided 4- pin connectors (see ffgure below). On the Powerwall side, use the black connector provided in the accessory bag. On the Backup Gateway side, use the connector that came plugged into the corresponding connector socket in the Backup Gateway. Figure 12. Communication Connector Wiring 7. On the Backup Gateway side of the 4-conductor communication cable, cut back the drain wire. The drain wire should be terminated at the Powerwall chassis Earth terminal only. 8. On the Backup Gateway side, plug the 4-pin connector into the 4-pin socket labelled “Powerwall”. Tighten screws on the connector. NOTE: See Backup Gateway 2 Communication Wiring on page 57 for diagrams and wiring speciffcations. 9. On the Powerwall side, plug the 4-pin connector into the bottom 4-pin socket (labeled “IN”) in the Powerwall wiring compartment. 10. Plug the provided 4-pin connector with the terminating 120-Ohm resistor into the top 4-pin socket (labeled “OUT”) in the Powerwall wiring compartment. (In multi-Powerwall installations, use this connector only in the last Powerwall in the chain.) 11. On the Powerwall side, strip the end of the equipment grounding conductor and wrap the communication cable drain wire around the grounding conductor lead. STEP 5: MAKE COMMUNICATIONS CONNECTIONS 36Powerwall 2 AC Installation Manual 12. Insert the grounding conductor and drain wire in the Powerwall chassis Earth terminal (see ffgure below). The Earth terminal is identiffed with the following symbol: . Tighten the screw in the Earth terminal to 4.5 Nm. Figure 13. Powerwall Earth / Ground and Communication Connections with a Terminating Resistor NOTE: The Tesla Powerwall system supports ESS Operating Mode of Import Only, where it will not export active power from the battery to the Area EPS. The installer and the customer can select three standard modes of operation for the Powerwall: Backup, Solar Self-Powered, and Time of Use. All three of the modes of operations operate within the constraint of the Import Only ESS Operating Mode. NOTE: This system is equipped with a power control system (PCS) which is suitably rated to provide branch circuit overcurrent protection. The controlled current setting shall not exceed the rating of any controlled busbars or conductor ampacity. NOTE: The PCS controlled current setting for each PCS controlled conductor or bus bar shall be indicated with a ffeld applied marking label on the conductor or in close proximity to the busbar. Figure 14. PCS Field Marking Label WARNING: Only qualiffed personnel shall be permitted to set or change the setting of the maximum operating current of the PCS. The maximum PCS operating current setting shall not exceed the busbar rating or conductor ampacity of any PCS controlled busbar or conductor. WARNING: Conffguration of power control settings system or changes to settings shall be made by qualiffed personnel only. Incorrect conffguration or setting of the power control settings may result in unsafe conditions. STEP 5: MAKE COMMUNICATIONS CONNECTIONS 37Powerwall 2 AC Installation Manual NOTE: The maximum operating currents in controlled busbars or conductors are limited by the settings of the power control system (PCS) and may be lower than the sum of the currents of the connected controlled power sources. The settings of the PCS controlled currents may be used for calculation of the design currents used in the relevant sections of NEC Article 690 and 705. NOTE: Maximum PCS Controlled Current setting: 200 A. Panel Limit Feature NOTE: The Panel Limit feature is not automatically enabled for Powerwall systems without a Powerwall+. Site Controller Software UL 1741 Power Control System requirements and the “Panel Limits” feature are implemented in the Tesla Site Controller software. Tesla’s Site Controller software is used across all Tesla Powerwall sites. Site Controller software controls the entire energy storage site and communicates over CAN and Wi-Fi. The Backup Gateway and Neurio (W1/W2) meter (if present) are part of a Powerwall system and contain two current sensors, one per phase, to act as a site and/or solar meter, which measure the grid and uncontrolled power production sources. Feature Introduction As per requirement from NFPA 70: 2020, 705.13, Tesla Site Controller software has implemented a Panel Limit feature that monitors the amperage flowing into an electric panel / busbar from all controlled and uncontrolled sources (Grid, Solar Inverter, and Powerwall). As the measured current approaches the conffgured panel limit, the Site Controller ffrst reduces the current contribution of batteries, then limits the output of solar. If the measured current of all sources combined exceeds the conffgured Panel Limit for the site, the output of all PCS-controlled power production sources will be curtailed to 0. Notes • The “Virtual Panel” may include several panels and conductors, and is considered as one single panel with respect to the Panel Limit feature. • Grid is measured by one or more physical site meters to measure the full current flowing into the virtual panel from the grid. • Uncontrolled Sources include external Solar Inverters or similar sources to the virtual panel STEP 5: MAKE COMMUNICATIONS CONNECTIONS 38Powerwall 2 AC Installation Manual • Controlled Sources include Tesla ACPW and Tesla Powerwall+ in any quantity and combination (e.g. two ACPW and one Powerwall+) Example Single Line Diagrams for Common Installation Configurations • ACPW and Uncontrolled Solar Inverter and Gateway 2 North America for Whole Home Backup • ACPW and Uncontrolled Solar Inverter and Gateway 2 North America for Partial Home Backup Monitoring (2020 NEC, 705.13 (A)) • Tesla Site Controller receives meter data from the Backup Switch or Backup Gateway 2 (meter X and/or meter Y), and/or Neurio (W1 / W2) • Tesla Site Controller receives controlled current data of the AC output from the AC Powerwall. • Current flowing into the Virtual Panel (positive current in all three meter types) is added together for comparison with the Panel Limit. • Implementing panel limits does not require dedicated meters. STEP 5: MAKE COMMUNICATIONS CONNECTIONS 39Powerwall 2 AC Installation Manual • Where communications are lost with any meter, all controlled power production sources are curtailed. Settings (2020 NEC, 705.13 (B)) • The panel site limit setting is restricted to Tesla personnel only and can be set in the conffg ffle with “panel_max_current” option. • As there may be more than one physical panel and conductors included, the panel limit is set to the rating of the smallest busbar within the “Virtual Panel”. • By default, all Backup Switch installs are automatically conffgured with a 100A Panel Limit. As 100A is the minimum allowable size for a single family dwelling per NEC 230.79 (C), this protects any main panel busbar for a single family dwelling with any quantity of Tesla Powerwall • The maximum allowed Panel Limit setting (in Amps) can be veriffed by viewing the Summary page in the Commissioning Wizard. Overcurrent Protection (2020 NEC, 705.13 (C)) • The Tesla Site Controller software is certiffed under UL 1741 PCS as secondary overcurrent protection. • Overcurrent devices are still required for each circuit as required by the National Electrical Code. • Software curtails the output of the battery and solar as load approaches the Panel Limit. Once battery and solar have been curtailed, loads would be fed exclusively from the grid. Thus the busbar is protected by the main breaker, or the breaker in an upstream panel, as intended prior to the addition of secondary power sources. Single Power Source Rating (2020 NEC, 705.13 (D)) • Each Powerwall connection to the electrical panel requires an independent 30 A circuit breaker. • This breaker serves as the disconnect for the unit, and must be wired in accordance with local wiring codes and regulations. • This breaker is by design smaller than the smallest panel used within the system, and smaller than the panel limit. • The service disconnect overcurrent rating is unchanged based on the Panel Limit. Access to Settings (2020 NEC, 705.13 (E)) • The Panel Limit feature is only adjustable by Tesla personnel. • The PCS controlled current setting will be auto-enabled and the only method to change it will be to call Tesla. A Tier 2 support technician will adjust the setting via Tesla software programs that are only accessible with a Tesla username and password. Install Optional Remote Disable Switch NOTE: This section provides guidelines on a system functionality. Please consult your local AHJ or Utility before use. The Backup Gateway 2 can be wired to include an external Remote Disable switch that simultaneously commands all Powerwalls to become idle and enter a safe mode. Installation Instructions The Remote Disable switch is wired through a low voltage, 12 V DC, control circuit connected to the Gateway AUX port. STEP 5: MAKE COMMUNICATIONS CONNECTIONS 40Powerwall 2 AC Installation Manual Figure 15. Wiring a Remote Disable Switch to the Backup Gateway AUX Port STEP 5: MAKE COMMUNICATIONS CONNECTIONS 41Powerwall 2 AC Installation Manual 1. Remove the factory-installed jumper from pins 1 and 2 of the 5-position “AUX” connector inside the Gateway 2. See Appendix B: Wiring Reference on page 54 for a diagram of the connector location. 2. Using minimum 24 AWG conductors (maximum 16 AWG), with wiring methods according to code, connect pins 1 and 2 (labeled “SDO” and “SDI”) to a suitable disconnect switch. 3. Conffrm that all Powerwalls cease operation when the switch is open. Operation Initiate Remote Disable Turn the switch to the OFF (open) position All Powerwalls will go to idle. This behavior is the same whether the AC utility grid is present or not. Resume Powerwall Operation Turn the Switch to the ON (closed) position AC Grid Present AC grid not present (Ofi-grid or AC grid is down) Normal system operation will resume shortly Powerwall operation will only resume when the grid is back or a 12V jump start is provided to the Gateway STEP 5: MAKE COMMUNICATIONS CONNECTIONS 42Powerwall 2 AC Installation Manual Guidelines for Remote Disable Switch Selection and Installation • Must be Listed or Recognized as "Emergency Stop Button", "Emergency Stop Device", "Emergency Stop Unit" • Must be lockable in the OFF/open position when necessary to comply with AHJ requirements • Must have a clear indication of ON/OFF position • Must be outdoor rated (NEMA 3R or higher) • Should be installed externally in a readily accessible location preferably near utility meter • The maximum low voltage wire run from switch to Gateway should not exceed 150 feet (45 m) • Should observe 12V, 0.1 A ratings STEP 5: MAKE COMMUNICATIONS CONNECTIONS 43Powerwall 2 AC Installation Manual STEP 6: INSTALL ENERGY METERING FOR THE SYSTEM About Energy Metering Visibility on power and energy data is needed for the Powerwall system to operate properly. An energy meter accomplishes this by measuring voltage (by voltage tap) and current (by Current Transformer, CT) at certain points in the system. There are many possible conffgurations for installing metering depending on system design. However, there are two goals: • Metering the Site – Site meters show the overall power flow to/from a site from the Grid’s perspective. Thus, Site meter(s) must be installed upstream of all solar production, Powerwalls, and loads. Multiple physical Site meters can be installed together where needed, but their sum should capture all of the power flows from load, solar, and Powerwall(s). • Metering all Solar – Solar meters capture production from PV inverter(s). There must not be any loads or Powerwalls behind the Solar CTs. This would result in under- or over-estimation of solar production. Site and Solar Metering for Backup Gateway 2 Backup Gateway 2 makes metering simple with built-in options for Site and Solar metering: • Internal Primary Meter (Meter X) – This Site meter may be used when the Grid connection is at the Supply terminals. No additional steps are needed during install. If there are any loads or solar upstream of the Supply terminals, Tesla 100 A CTs connected to the Internal Auxiliary Meter can be used to measure loads less than 100 A, or a Remote Meter can be used to meter the Grid connection point. • Internal Auxiliary Meter (Meter Y) – Metering solar circuits inside the Gateway or in adjacent switchboards is simple with the three (3) internal CT connections for use with Tesla 100 A CTs (one included in the Accessory Kit). Additional Tesla 100 A CTs (Tesla P/N 1467316-00-x) may be ordered individually. The Tesla 100 A CTs may be extended a max distance of 330 ft (100 m) by splicing twisted pair or using the Tesla 100A CT Extension (10 ft/3 m) (Tesla P/N 1467274-00-x). Use 20 AWG (0.5 mm2) conductors or larger to extend CTs up to 330 ft (100 m). Voltage rating of the extension wire must be equal to or greater than all other adjacent circuits. Depending on site layout it may not be possible to use internal Gateway 2 meters, and Remote Energy Meters will be required. • See Appendix D: Configure Energy Metering on page 66 for further guidance on metering. • See Appendix E: Installing a Neurio Energy Meter on page 67for Remote Neurio Meter installation instructions. 44Powerwall 2 AC Installation Manual Install Tesla 100 A CTs WARNING: Before installing, disconnecting, and/or adjusting CTs, ensure the circuits being measured are not energized and the system is completely powered down. Failure to de-energize the system may compromise operator and equipment safety. 1. Plug the Tesla 100 A CT into the terminal in the Backup Gateway. Ensure the connector is fully seated in the terminal. 2. Clamp the CT around the conductor to be measured. Figure 16. Embedded Site CTs and Solar CT Connectors Tips • See Appendix D: Configure Energy Metering on page 66 for additional diagrams on conffguring energy metering. • When metering split-phase 240 V solar inverters, a single CT on L1 or L2 can be used to meter production. • The CT1 and CT2 terminals have voltage references to L1 and L2 respectively and cannot be reconffgured. The CT3 terminal has a default voltage reference to L1 but can be conffgured as L2 in the Commissioning Wizard. • Ensure CTs are facing the proper direction as indicated on the label. A CT will show negative current if installed backwards. • When upgrading a Gateway 1 system, the existing Remote (Neurio) Energy Meter(s) may be left in place and re-paired with the new Gateway. The Remote Meter must be power cycled within one minute prior to re-pairing. If metering Site power with the Remote Meter, ensure the Backup Gateway 2 internal site meter is de-selected in Commissioning. • See Appendix G: Installation Troubleshooting on page 82 for CT conffguration troubleshooting tips. • The Powerwall installer has the option to set a Conductor Export Limit, or a Site Charge Limit. When used, the Powerwall will dynamically curtail to meet these site-speciffc programmed thresholds. See Appendix F: Feature Notes on page 79 for more information. STEP 6: INSTALL ENERGY METERING FOR THE SYSTEM 45Powerwall 2 AC Installation Manual STEP 7: COMPLETE THE INSTALLATION Plan Internet Connection for the Backup Gateway 2 Internet connectivity is required to receive the full 10-year Powerwall warranty, and for the customer to see their system in the Tesla App. For best performance, ensure Ethernet and Wi-Fi connections are both conffgured during commissioning. The Gateway will automatically select the network option with best connection. Cellular is available only as a backup connection when Wi-Fi and Ethernet connections are lost. Cellular should not be relied on as the default connection method. Install Ethernet Connection • Ethernet cable must be CAT5 (24 AWG) cable at minimum. • If not possible to run an Ethernet cable directly to the customer’s network router, Powerline Ethernet socket adapters may be used. • See Appendix B: Wiring Reference on page 54 for the position of the Ethernet port. Close the Wiring Compartments and Turn the System On 1. Before closing any installed hardware, take photos of the completed wiring in the Powerwall, Backup Gateway, and main distribution board. 2. Ensure that all conduit junctions and cable entry points are secure and properly sealed. 3. Arrange the communication and AC power wires neatly inside the Powerwall wiring compartment. 4. Replace the cover on the Powerwall wiring compartment. Ensure that the cover seats properly on the gasket so that the compartment is sealed. Using a Torx T20 bit, tighten the fasteners to 1.5 Nm. 5. Replace the left side cover on Powerwall by pushing the top into place and working toward the bottom to reattach it to the clips along the length of the unit. 46Powerwall 2 AC Installation Manual 6. Install the Backup Gateway dead front panel and secure it ffrmly with the original screw. Mount the Backup Gateway door, and latch it shut. Figure 17. Install the Dead Front Cover and Glass Door 7. Use the provided breaker label sheet to clearly label the circuit breakers. NOTE: If the Backup Gateway is installed outdoors or in a high-traffic area, the latch can be locked shut. 8. Switch on the AC circuit breakers for the Backup Gateway and Powerwall. WARNING: Upon powering on the Backup Gateway and Powerwall system, allow it to boot up undisturbed for at least one minute. Do not power cycle or reset the Backup Gateway during this time, as the boot sequence must be completed for the software to operate properly. 9. Switch on Powerwall by moving the switch on the right side of the unit to the ON position. When Powerwall establishes communication with the Backup Gateway, the LED on the right side of Powerwall illuminates. CAUTION: Always leave site with Powerwall breaker closed for battery to maintain a base level of charge. Leaving the Powerwall disconnected from AC for extended periods increases risk of damage. STEP 7: COMPLETE THE INSTALLATION 47Powerwall 2 AC Installation Manual STEP 8: COMMISSION THE SYSTEM Commission the System See Commission a System Using the Setup App for instructions to connect to the TEG Wi-Fi network and commission the system. Finish and Demonstrate the Installation 1. After installation is complete, remove the protective fflm from Powerwall. 2. Remove the plastic straps from the left and right side covers by cutting them and carefully pulling them through the slots in the covers. 3. If necessary, ask the homeowner to download and install the Tesla mobile app and connect to the system. 4. Demonstrate the capabilities of the Tesla mobile app, such as how to change the operation mode. 5. Simulate an outage by opening the main breaker and show that Powerwall is powering backup loads. 6. Leave the Powerwall Owner’s Manual with the owner of the newly installed system. 7. Archive the photos from the installation. Troubleshooting See Appendix G: Installation Troubleshooting on page 82 for common installation troubleshooting steps. Technical Support Resources for Certiffed Installers, including service request forms and the latest versions of installation manuals, are available within the Tesla Partner Portal: https://partners.tesla.com Maintenance Powerwall does not require pre-scheduled preventative maintenance. The only maintenance required by an owner is to keep the unit connected to the internet and free and clear of debris, especially around the air intake and exhaust. To clean Powerwall, use a soft, lint-free cloth. If needed, the cloth can be dampened with mild soap and water only. Do not use cleaning solvents to clean Powerwall, or expose Powerwall to flammable or harsh chemicals or vapors. 48Powerwall 2 AC Installation Manual APPENDIX A: POWERWALL MOUNTING DETAILS Powerwall Space Requirements Figure 18. Powerwall 2 Mounting Bracket Dimensions and Space Requirements Minimum lateral wall space 38 in (960 mm) Minimum clearance from left side (air intake)2 in (50 mm)1 Minimum clearance from right side (air exhaust)6 in (150 mm) Minimum clearance above single Powerwall 2 in (50 mm) Minimum clearance above side-by-side Powerwalls 12 in (300 mm) Minimum clearance between side-by-side Powerwalls 10 in (250 mm) Maximum height above ground 39.5 in (1 m) to bottom of unit Maximum slope +/– 2° side-to-side +/– 5° front-to-back 1Ensure there is sufficient working space to connect Powerwall wiring. Tesla recommends at least 200 mm (approximately 8 inches) of working space to the left of the unit. NOTE: Powerwall meets the unit level performance criteria of UL 9540A, allowing Powerwall to be installed side-by-side as long as the clearance requirements deffned in this manual are followed to allow for air flow around the units. NOTE: Powerwall has a pump and fan that produce a gentle hum during operation, comparable to a typical refrigerator. The noise level depends on the ambient temperature and the power level of operation. Consider these noise levels when choosing where to install Powerwall. 49Powerwall 2 AC Installation Manual Mounting Bracket Anchoring Details NOTE: The details below are minimum guidelines and are not guaranteed to be applicable. Refer to local building codes to ensure the use of appropriate fasteners. Refer to Powerwall 2 Anchorage Details for complete mounting information. Wood Studs (spaced at 12, 16, 20 or 24 inches) If anchoring directly into wood studs, use at least four (one in each corner) 1/4-inch wood screws with washers, of sufficient length for at least 2.5 in embedment into the studs. Wood Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to blocking between wood studs, use minimum 2 x 4 in blocks, end-nailed into studs with two 16d nails or toe-nailed into studs with four 8d nails. Use at least four (one in each corner) 1/4-inch wood screws with washers, of sufficient length for at least 2.5 in embedment into the blocking. APPENDIX A: POWERWALL MOUNTING DETAILS 50Powerwall 2 AC Installation Manual Plywood If anchoring to plywood wall material, the plywood must be minimum 1/2-inch thick. Use at least four (one in each corner) 1/4-inch wood screws with washers, of sufficient length to penetrate at least 1/4 inch beyond the backside of the plywood. Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring directly to metal studs, studs must be minimum 18 gauge. Use at least four (one in each corner) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the stud. Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to backing between metal studs, studs must be minimum 25 gauge, and backing must be minimum 22 gauge. Use at least eight (two in each corner) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the backing. APPENDIX A: POWERWALL MOUNTING DETAILS 51Powerwall 2 AC Installation Manual Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to backing between metal studs in an outdoor high wind area, studs must be minimum 25 gauge, and backing must be minimum 22 gauge. Use at least twelve (three in each corner) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the backing. Concrete or Masonry Minimum strength must be 2500 PSI (concrete) or 1500 PSI (masonry). Use at least four (one in each corner, in any available anchor slot) minimum 1/4-inch fasteners with washers, of sufficient length for at least 1.5 in (38 mm) embedment into the material. Ensure that all fasteners are at least 1.5 in (38 mm) away from the edges of masonry blocks . When required, use 3/8-inch ESR fasteners and full embedment as required by the ESR and fastener schedule. For stacked units and severe seismic (Ss ≥ 2.6) or wind (Wind Speed (ULT) ≥ 160mph) conditions, use at least eight (two in each corner, in any available anchor slot) fasteners. Brick Minimum strength must be 1700 PSI. Use at least four (one in each corner, in any available anchor slot) 3/8-inch mesh anchor sleeves, of sufficient length for at least 3 1/8-inch embedment into the material, fflled 75% with adhesive. APPENDIX A: POWERWALL MOUNTING DETAILS 52Powerwall 2 AC Installation Manual Channel Strut (Unistrut) Struts must be minimum 1-5/8 in x 1-5/8 in, 12 gauge. If mounting on wood studs, attach the strut to at least three studs, using at least one 1/4-inch wood screw with washer per stud, of sufficient length for at least 2.5 in embedment into the studs. If mounting on metal studs, attach the strut to at least three studs, using at least two #14 sheet metal screws with washers per stud, of sufficient length to penetrate at least 3 threads beyond the studs. To attach the bracket to the struts, use at least four (one in each corner) 1/4-inch hex head screws with washers and strut nuts. APPENDIX A: POWERWALL MOUNTING DETAILS 53Powerwall 2 AC Installation Manual APPENDIX B: WIRING REFERENCE Powerwall Wiring Table 3. Powerwall Wiring: Communication Powerwall Terminal Recommended Wire Color Wire Gauge 1 12V + (Logic +)Brown 18 - 16 AWG (0.8 - 1.5 mm2) 2 GND (Earth)White 18 - 16 AWG (0.8 - 1.5 mm2) 3 CN + (CAN HI)Blue 24 – 16 AWG (0.2 – 1.5 mm2) 4 CN – (CAN LO)Yellow 24 – 16 AWG (0.2 – 1.5 mm2) Cable Shield/Drain Wire (Terminate at Powerwall chassis ground lug only) Table 4. Powerwall Wiring: Power1 Powerwall Terminal Recommended Wire Color Wire Gauge 5 L2 (Line 2) – to Neutral Red 10– 8 AWG (6 – 10 mm2) 6 N (Neutral)White 10 – 8 AWG (6 – 10 mm2) 7 L1 (Line 1)Black 10 – 8 AWG (6 – 10 mm2) 8 Chassis Ground Lug Green / Yellow 10 – 8 AWG (6 – 10 mm2) 1 Depending on local code for installation methods and cable sizing calculations. NOTE: Refer to local codes and standards for correct wiring practices and wire colors. 54Powerwall 2 AC Installation Manual (2) Wago lever nuts are provided for use with up to 6 mm2 AWG cable. If 10 mm2 cables are required per wiring methods, other appropriate connectors may be used, or a junction box near the Powerwall can be used to convert from 10 to 6 mm2 cables. Follow all code wiring requirements. NOTE: Suitable wire ferrules may be used with Wago connectors, but are not required. Backup Gateway 2 Wiring NOTE: Wire terminals (B, C, D, E, F, G, I, and K above) are rated to a minimum of 75°C. Table 5. Backup Gateway 2 Wiring: Power Component Recommended Wire Color Wire Gauge 1 Torque A Ethernet Terminal -24 AWG CAT5 or better - B Main Ground Terminals Green or Bare 6 AWG – 2/0 120 in-lbs (14 N-m) C Load/Generation Ground Terminals Green or Bare See Neutral Bar and Ground Bar Torque Specs on page 56 See Neutral Bar and Ground Bar Torque Specs on page 56 D Supply Terminals (L1, L2) Black, Red 6 AWG – 250 kcmil 275 in-lbs (31 N-m) E Backup Loads and Generation (L1, L2) Black, Red 6 AWG – 250 kcmil 275 in-lbs (31 N-m) F Main Neutral Terminals White 6 AWG – 250 kcmil 275 in-lbs (31 N-m) G Load / Generation Neutral Terminals White See Neutral Bar and Ground Bar Torque Specs on page 56 See Neutral Bar and Ground Bar Torque Specs on page 56 APPENDIX B: WIRING REFERENCE 55Powerwall 2 AC Installation Manual Component Recommended Wire Color Wire Gauge 1 Torque H Neutral-Ground Bonding Strap --- I Non-Backup Loads (L1, L2) Black, Red 14 - 2 AWG 120 in-lbs (14 N-m) J RESET button --- K Optional Internal Panelbard Terminals Black, Red 300 kcmil - 1 AWG 225 in-lbs (25 N-m) 1 Use copper or aluminum conductors. Figure 19. Backup Gateway 2 Neutral Bar and Ground Bar Table 6. Neutral Bar and Ground Bar Torque Specs Terminal Wire Gauge 1 Torque 1 14 AWG - 10 AWG 20 in-lbs (2.3 N-m) 8 AWG 25 in-lbs (2.8 N-m) 6 AWG - 4 AWG 35 in-lbs (4.0 N-m) 2 14 AWG - 10 AWG 35 in-lbs (4.0 N-m) 8 AWG 40 in-lbs (4.5 N-m) 6 AWG - 4 AWG 45 in-lbs (5.1 N-m) 3 AWG - 1.0 50 in-lbs (5.6 N-m) 3 14 AWG - 10 AWG 35 in-lbs (4.0 N-m) 8 AWG 40 in-lbs (4.5 N-m) 6 AWG - 4 AWG 45 in-lbs (5.1 N-m) APPENDIX B: WIRING REFERENCE 56Powerwall 2 AC Installation Manual Backup Gateway 2 Communication Wiring Table 7. Backup Gateway Communication Wiring Terminal Name Recommended Wire Color Wire Gauge 1 12V + (Logic +)Brown 18 - 16 AWG (0.8 - 1.5 mm2) 2 GND (Earth)White 18 - 16 AWG (0.8 - 1.5 mm2) 3 CN + (CAN HI)Blue 24 – 16 AWG (0.2 – 1.5 mm2) 4 CN – (CAN LO)Yellow 24 – 16 AWG (0.2 – 1.5 mm2) Table 8. Aux Wiring Terminal Name Recommended Wire Color Wire Gauge 1 Remote Disable (OUT)-24 – 16 AWG (0.2 - 1.5 mm2) 2 Remote Disable (IN)-24 – 16 AWG (0.2 - 1.5 mm2) 3 Generator / Load Control (+)Red 18 – 16 AWG (0.8 - 1.5 mm2) 4 Generator / Load Control (-)Black 18 – 16 AWG (0.8 - 1.5 mm2) 5 Interlock pin -24 – 16 AWG (0.2 - 1.5 mm2) Table 9. External Meter Communication Wiring Terminal Name Recommended Wire Color Wire Gauge 1 GND (Earth) / Shield -24 – 16 AWG (0.2 - 1.5 mm2) 2 RS485 HI #1 Red 24 – 16 AWG (0.2 - 1.5 mm2) 3 RS485 LO #1 Black 24 – 16 AWG (0.2 - 1.5 mm2) 4 GND (Earth) / Shield -24 – 16 AWG (0.2 - 1.5 mm2) 5 RS485 HI #2 Red 24 – 16 AWG (0.2 - 1.5 mm2) 6 RS485 LO #2 Black 24 – 16 AWG (0.2 - 1.5 mm2) APPENDIX B: WIRING REFERENCE 57Powerwall 2 AC Installation Manual Table 10. Jump Start Wiring Terminal Name Recommended Wire Color Wire Gauge 1 12V Red 24 – 16 AWG (0.2 - 1.5 mm2) 2 GND Black 24 – 16 AWG (0.2 - 1.5 mm2) Acceptable Circuit Breakers Acceptable Main Circuit Breakers Table 11. Eaton CSR 25 kAIC Breakers Amps Part Number Description 100 CSR2100 Eaton # CSR2100N: 100A MB; 2-Pole, 240V, 25kAIC, For Convertible Load Centers 125 CSR2125N Eaton # CSR2125N: 125A MB; 2-Pole, 240V, 25kAIC, For Convertible Load Centers 150 CSR2150N Eaton # CSR2150N: Breaker, 150A, 2P, 120/240V, 25 kAIC, Type CSR 175 CSR2175N Eaton # CSR2175N: 175A MB; 2-Pole, 240V, 25kAIC, For Convertible Load Centers 200 CSR2200N Eaton # CSR2200N: 200A MB ONLY; 2-Pole, 120V/240V, 25kAIC, Bolt On Table 12. Eaton BW 10 kAIC Breakers Amps Part Number Description 100 BW2100 Eaton # BW2100: 100A Main Circuit Breaker; 2-Pole, 240V, 10kAIC 150 BW2150 Eaton # BW2150: Circuit Breaker; 150A/240V/2P 175 BW2175 Eaton # BW2175: Circuit Breaker; 175A/240V/2P 200 BW2200 Eaton # BW2200: 200A Main Circuit Breaker; 2-Pole, 240V, 10kAIC Table 13. Eaton BWH 25 kAIC Breakers Amps Part Number Description 100 BWH2100 Eaton # BWH2100: 100A Circuit Breaker; 2-Pole, 120V/240V, 25kAIC, Bolt On 125 BWH2125 Eaton # BWH2125: 125A Circuit Breaker; 2-Pole, 120V/240V, 25kAIC, Bolt On 150 BWH2150 Eaton # BWH2150: 150A MB; 2-Pole, 120V/240V, 25kAIC, Bolt On 175 BWH2175 Eaton # BWH2175: 175A MB; 2-Pole, 120V/240V, 25kAIC, Bolt On 200 BWH2200 Eaton # BWH2200: 200A MB; 2-Pole, 120V/240V, 25kAIC, Bolt On Acceptable Branch Circuit Breakers Manufacturer Model Current Rating SCCR Siemens QP Series all breakers up to 80A 10kA Schneider / Square D Homeline Series all breakers up to 80A 10kA Eaton BR Series all breakers up to 80A 10kA APPENDIX B: WIRING REFERENCE 58Powerwall 2 AC Installation Manual APPENDIX C: SYSTEM WIRING DIAGRAMS Overview The following diagrams are intended for illustration purposes only. Drawings represent sample site layouts to show example system layout and metering. Please note that these examples represent common conffgurations and are not the only allowable conffgurations. Lastly, these diagrams should not be considered complete plan sets. The Wiring Key below illustrates how the lugs in the Backup Gateway are connected. Figure 20. Backup Gateway 2 Wiring Key Whole-Home Backup • All loads and generation are downstream of the Backup Gateway contactor. • Site-level metering by integrated Site CTs. • Internal panelboard kit may be used for Generation breakers. • Neutral-Ground Bonding Strap installed only if Gateway is main service equipment. 59Powerwall 2 AC Installation Manual Figure 21. Whole Home Backup with Standalone Meter APPENDIX C: SYSTEM WIRING DIAGRAMS 60Powerwall 2 AC Installation Manual Figure 22. Whole Home Backup with Meter Load Center APPENDIX C: SYSTEM WIRING DIAGRAMS 61Powerwall 2 AC Installation Manual Partial-Home Backup • Non-Backup loads (refer to design guidance for information on selecting circuits to back up) • If Non-backup loads connected to Non-Backup Lugs, site-level metering by integrated Site CTs. • If Non-backup loads are upstream of Gateway, site-level metering by integrated Site CTs plus additional 100 A CTs on L1/L2 of non-backup circuit, or by remote meters at point of interconnection. • The internal panelboard kit may be used for Generation breakers or Non-Backup loads. • Neutral-Ground Bonding Strap installed only if Gateway is main service equipment. APPENDIX C: SYSTEM WIRING DIAGRAMS 62Powerwall 2 AC Installation Manual Figure 23. Partial Home Backup with Standalone Meter APPENDIX C: SYSTEM WIRING DIAGRAMS 63Powerwall 2 AC Installation Manual Figure 24. Partial Home Backup with Standalone Meter - Option Using Secondary Load Lugs APPENDIX C: SYSTEM WIRING DIAGRAMS 64Powerwall 2 AC Installation Manual Figure 25. Partial Home Backup with Meter Load Center APPENDIX C: SYSTEM WIRING DIAGRAMS 65Powerwall 2 AC Installation Manual APPENDIX D: CONFIGURE ENERGY METERING 66Powerwall 2 AC Installation Manual APPENDIX E: INSTALLING A NEURIO ENERGY METER Neurio Energy Meter Overview If additional energy metering is required (in addition to the built-in metering), remote Neurio Energy Meter(s) may be paired with Backup Gateway. Beginning with Powerwall ffrmware 21.13, Tesla supports both the Neurio W1 (Tesla P/N 1112484-02-x) and Neurio W2 (Tesla P/N 1112484-04-x) meters and their accessories. While the meters serve the same applications, there are some difierences between them which will be called out in the following sections. It is very important to note that Neurio W1 accessories are not compatible with the Neurio W2 meter, and Neurio W2 accessories are not compatible with the Neurio W1 meter. Important Notes • Neurio W2 CTs are only compatible with Neurio W2 meters, and Neurio W1 CTs are only compatible with Neurio W1 meters. Do not attempt to install Neurio W1 CTs with a Neurio W2 meter, or vice versa • 800 A CTs are only available with the Neurio W1 meter Figure 26. Neurio W1 Meter Kit with 200 A CTs Figure 27. Neurio W2 Meter Kit with 200 A CTs NOTE: When replacing a Gateway, the existing Neurio Energy Meter(s) may be left in place in the main distribution board and re-paired. The Neurio Meter must be power cycled within one minute prior to re-pairing. If metering Site power with the Neurio Meter, ensure the Gateway's internal site meter is deselected in Commissioning. Wireless Communication to the Backup Gateway The Neurio Energy Meter (Tesla P/N 1112484-00-x) is wirelessly paired with Backup Gateway as part of the normal Powerwall commissioning process within the Commissioning Wizard. 67Powerwall 2 AC Installation Manual Wired Communication to the Backup Gateway As an alternative to wireless communication with the Neurio meter, it is possible to establish wired communication between the meter and the Gateway using an optional 2-conductor meter communication harness (Tesla P/N 1133339-00-x). Up to two meters can be wired directly to the Gateway. The meter antenna is always required, even if the meter is located inside the Backup Gateway enclosure or connected to the Gateway using the optional wired communication harness. NOTE: Tesla recommends connecting the meter via wireless Wi-Fi rather than using a wired connection. This is because the meter receives ffrmware updates with new features and improvements, but only if the meter is communicating to the Gateway via Wi-Fi. Firmware updates are not possible when the meter is using wired communication. If you must use wired communication, connect the meter to the Gateway wirelessly ffrst to update the meter ffrmware, then transition to wired communication. 1. Plug the 2-conductor harness into the port on the top of the meter. 2. Connect the harness leads to the Backup Gateway Meter Communication ports by inserting them into the corresponding connector, according to the following table and diagram. Figure 28. Meter Communication Wiring Backup Gateway Meter Communication Pin Meter Terminal Wire Gauge 3, 6 RS485 LO 3 24-16 AWG (0.2–1.5 mm2) or CAT5 (24 AWG) 2, 5 RS485 HI 2 24-16 AWG (0.2–1.5 mm2) or CAT5 (24 AWG) 1, 4 (Earth/Shield) 1 1 24-16 AWG (0.2–1.5 mm2) or CAT5 (24 AWG) 1 The shield wire is optional; if extending the harness leads with communication wiring that includes a shield wire, land it at the Gateway Comms 1 and 4 ports. Meter Voltage Taps The voltage line harness provided in the meter kit is used to install the corresponding voltage taps in the electrical panel. Modify the harness by combining the blue and red leads. APPENDIX E: INSTALLING A NEURIO ENERGY METER 68Powerwall 2 AC Installation Manual Figure 29. Voltage Line Harness with Combined Leads Voltage Tap and Current Transformer Connections Voltage taps and current transformers must be connected so they are measuring the same phase. They must correspond according to the following table and diagram: Figure 30. Neurio W1 Voltage Tap Port (left) and Four CT Ports (right) on Bottom of Meter Figure 31. Neurio W2 Voltage Tap Port (left) and CT Ports (right) Phase Meter Voltage Tap Port Meter CT Port Solar L1 A 1/A Solar L2 B/C*2/B Solar L1 4/A Solar L2 3/C *With combined leads in voltage line harness, ports B and C are equivalent (correspond to L2). APPENDIX E: INSTALLING A NEURIO ENERGY METER 69Powerwall 2 AC Installation Manual Meter Placement and CT Wire Lengths Neurio CT Wire Lengths CT Lead Length CT Extension Kit Length Maximum Wire Extension Neurio W1 CT 1.5 m (5 ft) 3 m (10 ft) Tesla P/N: 1125547-03-x Total Length: 4.5 m (15 ft) 15 m (50 ft) using wire with the following properties: • Shielded, twisted pair with drain wire • Wire gauge of 0.2–1.5 mm2 • Voltage rating equal to or greater than all other circuits in shared enclosures or raceways Neurio W2 CT 1.2 m (4 ft) 3.3 m (11 ft) Tesla P/N: 1622289-xx-y Total Length: 4.5 m (15 ft) 4.5 m (15 ft) using extension (wire splicing not supported) If the distance between the meter and the CT is greater than 50 ft (15 m), the meter can be relocated, or a second meter can be used. When the meter is relocated into the main distribution board, use the antenna extension to place the antenna on the outside of the distribution board. NOTE: CT extensions cannot be combined unless the connection point between extensions remains accessible (for instance, inside a panel). Current Transformer Placement CT placement locations include the following: Site (Grid): A CT is placed between the utility meter and main switch to measure both load and generation. See Appendix F for information on implementing a Site Limit to curtail Powerwall charging from the grid. Solar: If the site includes solar equipment, a CT is placed after the solar inverter to measure the solar output. Load: Site and solar metering are preferred. However, in conffgurations where it is not possible to locate CTs between the utility meter and the main switch, load metering can substitute for site metering. Conductor: Where desired to curtail Powerwall discharge on a conductor, a dedicated Conductor Limit CT can be installed. This feature is optional for installations. See Appendix F: Feature Notes on page 79 for more information. See Appendix C on page 59 for system wiring diagrams depicting CT placement for various wiring conffgurations. APPENDIX E: INSTALLING A NEURIO ENERGY METER 70Powerwall 2 AC Installation Manual Current Transformer Orientation CTs must be installed with the label on the CT housing pointing toward the power source, according to the following table and diagram. Always verify CTs are in the correct orientation by observing power flow in the Commissioning Wizard. Figure 32. Neurio W1 CT Orientation in Relation to Power Flow Figure 33. Neurio W2 CT Orientation in Relation to Power Flow CT Usage CT Orientation Site CTs CT label facing toward the service entrance/grid Solar CTs CT label facing toward the solar inverter Load CTs CT label facing away from the loads Current Transformer Capacity Standard Neurio CTs have a capacity of 200 A. If the wiring conffguration allows, it is possible to pass multiple conductors of the same type through a single CT, provided the sum of the conductor’s current ratings does not exceed the CT current handling capacity. This is especially useful for systems with multiple solar inverters. NOTE: Multiple conductors through a single CT is only possible if all conductors are on the same phase. APPENDIX E: INSTALLING A NEURIO ENERGY METER 71Powerwall 2 AC Installation Manual Figure 34. Multiple Conductors Passing Through Single Neurio W1 CTs If a site has multiple solar inverters spaced far apart, or if a main panel has two main breakers (for example, 400 A service with two 200 A breakers), a Y-splitter cable (for Neurio W1 meters: Tesla P/N 1129625-00-x, for Neurio W2 meters: Tesla P/N 1622286-xx-y) can be used to connect two CTs on the same phase to a single meter port. Figure 35. Y-Cables Connecting Neurio W2 CTs on the Same Phase APPENDIX E: INSTALLING A NEURIO ENERGY METER 72Powerwall 2 AC Installation Manual For the Neurio W1 meter, 800 A CTs are also available for larger service sizes (Tesla P/N 1447689-00-x). The 800 A CTs can only be used with the Neurio W1 meter, and the 800 A CT option must be selected in the Commissioning Wizard drop down menu on the CT page. NOTE: When 200 A CTs are used in parallel, each input channel can measure up to 400 A. When 800 A CTs are used in parallel, each input channel can measure up to 1100 A. Metering Split-phase Solar with a Single CT Metering a split-phase solar inverter with one Current Transformer (CT) is supported with ffrmware version 1.37 and later. In this conffguration, connecting a single CT to one of the two PV inverter output phases allows total power output to be calculated by software. The single CT must be installed on the phase that corresponds to the same CT port on the meter (phase A or B). It is possible to meter multiple split-phase solar inverters with one CT, if the solar inverter circuits are physically near each other: 1. Install both solar inverters with the same phasing 2. Group all conductors of the same phase together to pass through a single CT 3. As with a single inverter, it is important that the phase of this CT matches the phase of the voltage reference on the meter Installing the Meter Using the screws provided in the meter kit, attach the mounting plate to the inside of the main distribution board or to another surface. Choose a location that takes into account the voltage line harness and CT cable lengths. Wire the Voltage Taps 1. Plug the voltage line harness into the meter. 2. Connect the voltage line harness leads to a dedicated circuit breaker (not exceeding 16 A) of corresponding phase inside the distribution board: Voltage Harness Port/Wire Color Distribution Board Connection A / Black L1 breaker terminal B / Red L2 breaker terminal C / Blue Spliced with the Red B wire N / White Neutral busbar NOTE: If a dedicated circuit breaker is not available, the voltage line harness can be spliced to existing breakers. APPENDIX E: INSTALLING A NEURIO ENERGY METER 73Powerwall 2 AC Installation Manual Figure 36. Voltage Line Harness Wired to Dedicated Breakers (Left) or Spliced to Existing Breakers (Right) APPENDIX E: INSTALLING A NEURIO ENERGY METER 74Powerwall 2 AC Installation Manual Install the Antenna To install the antenna, screw it onto the meter. It is recommended to locate the antenna outside the enclosure using the included antenna extension: • Locate a 1/2” or 3/4" knockout and install a cable gland. • Mount the antenna by threading the extension cable through the included knockout mount and securing the mount. • Screw the antenna onto the extension cable and connect the extension cable to the meter. Figure 37. Antenna Port Locate the CTs • Place a CT on the corresponding power wire in the main distribution board after the utility meter and ahead of any loads. Be sure to orient the CTs with the “source this side” text facing the utility source. • Connect the CTs to the ports on the remote energy meter. Ensure the CTs are connected to the correct CT ports on the meter. Figure 38. Neurio W1 CT Ports (right) on Bottom of Meter APPENDIX E: INSTALLING A NEURIO ENERGY METER 75Powerwall 2 AC Installation Manual Figure 39. Neurio W2 Meter CT Ports APPENDIX E: INSTALLING A NEURIO ENERGY METER 76Powerwall 2 AC Installation Manual Neurio W2 Meter Installation Troubleshooting Chime Indication When powered on, the Neurio W2 will play the following tones to indicate its status in sequential order. Tone Indication Description Short Beeps Voltage check One beep for each voltage wire that is connected. For a 3-phase installation there should be three beeps to indicate that the brown, black, and gray wires are connected. Short Chime Neurio Wi-Fi network started Neurio has started housing its own Wi-Fi network. You can join this network to conffgure Neurio and connect it to your own Wi-Fi network. Long beep Voltage warning (conditional) Indicates that two wires are connected to the same phase. Long Chimes Neurio joined network successfully Neurio successfully joined your Wi-Fi network. Failing tone Neurio failed to join network Neurio was unable to join your Wi-Fi network. Neurio will now start hosting its own Wi-Fi network again to allow you to re-connect to Neurio and re-enter the Wi-Fi credentials. LED Indication The LED on the meter housing will also indicate the current state of the meter. Figure 40. Neurio W2 Meter LED Location State LED Behavior Powered Solid Red Wi-Fi Connected Solid Blue Normal Operation "Breathing" Blue Wi-Fi Network Lost Slow Flashing Blue (2s/2s) Attempting to join Wi-Fi Network Fast Flashing Blue (0.5s/0.5s) APPENDIX E: INSTALLING A NEURIO ENERGY METER 77Powerwall 2 AC Installation Manual Conffguration Network Up (Ready to Pair)Solid Green Conffguration Data Transfer (Pairing in Process)Blinking Purple Firmware Update in Progress Solid Yellow Pairing Behavior How long can a Neurio meter remain powered on to accept pairing requests? If the meter has never been paired, or if it was previously paired and then unpaired gracefully via the Commissioning Wizard, the meter will remain on and accept pairing requests indeffnitely. It will reboot every 30 minutes. If the meter has been previously paired and was not unpaired gracefully via the Commissioning Wizard, the pairing process must begin within 1 minute of bootup (audible chime). APPENDIX E: INSTALLING A NEURIO ENERGY METER 78Powerwall 2 AC Installation Manual APPENDIX F: FEATURE NOTES Conffguring Site Limits Site Import Limits The Backup Gateway can be conffgured to limit Powerwall charge power from the grid. When Site Limits are programmed by the installer during commissioning, the Powerwall charge power is dynamically adjusted based on the net measured site power and the programmed site limit threshold. Site Limits are conffgured in the Commissioning Wizard; select Site Import Limit from the Settings page. At the conclusion of the commissioning process, a summary of the settings will be displayed. The net site power measurement can be a virtual aggregated meter; therefore, abide by all prior guidance on meters and CTs. Conffguring Conductor Export Limits Overview The Powerwall system can be conffgured to limit Powerwall discharge power. When Conductor Export Limits are programmed, the Powerwall discharge power is dynamically adjusted based on the amperage measured by designated current transformers (CTs) and the programmed Conductor Limit amperage threshold. Set Conductor Export Limits Install CTs • Conductor CTs must be installed on conductors that are: ◦ Between the grid connection and the Powerwalls. ◦ At a location where the Powerwalls have control over current. • CTs should be oriented such that the label faces toward the grid. Complete Commissioning 1. In the Commissioning Wizard, assign the correct CTs to Conductor. NOTE: CTs can only be assigned one designation, meaning a CT cannot be both a Site and a Conductor CT. 2. Enter the amperage for the Conductor Limit on the Settings page. At the conclusion of the commissioning process, a summary of the settings will be displayed. 79Powerwall 2 AC Installation Manual Load Shedding Overview The Backup Gateway allows for load shedding, meaning a low voltage control circuit can be wired to control a speciffc load. For instance, an air conditioning load controlled by a thermostat can be wired to the low voltage control circuit in the Backup Gateway so that the load can be shed when Powerwall is ofi-grid. When commissioned for load shedding and the Powerwall system is on-grid, the low voltage control circuit is closed and the load is powered. When commissioned for load shedding and the system is operating ofi- grid, the low voltage control circuit is open and the load is OFF. When the system is wired for load shedding, the controlled load breaker can remain on the backup loads panel. NOTE: Refer to Appendix B: Wiring Reference on page 54 for wiring speciffcations NOTE: The load shedding feature is not applicable to permanently ofi-grid Powerwall systems. Permanently ofi-grid systems use the Backup Gateway Aux terminals for generator control rather than for load shedding. NOTE: To activate this feature in the Commissioning Wizard, make the appropriate selection to the "Gateway Low Voltage Relay" within the Installation page. This feature can be activated in ffrmware version 1.47 or later. APPENDIX F: FEATURE NOTES 80Powerwall 2 AC Installation Manual NOTE: See the Load Shedding with the Backup Gateway application note for an example installation which uses the load shedding feature to control a condenser for a central air conditioning system. NOTE: The low voltage control circuit will be opened briefly during ffrmware updates and under abnormal fault conditions. NOTE: The load shed relay is rated up to 60 V (DC or AC) and 2 A. APPENDIX F: FEATURE NOTES 81Powerwall 2 AC Installation Manual APPENDIX G: INSTALLATION TROUBLESHOOTING Accessing the Powerwall User Interface Use Chrome: Incognito mode or Safari: Private Browsing mode. Work in one browser tab only. For security message Your connection is not private. select Advanced and Proceed to 192.168.xx.x (unsafe). For Error: Bad Credentials, select FORGOT PASSWORD to reset password. For Error: Login Error (Cannot Start Wizard), select Click for More and tick the Force Launch Wizard option. Try again. If experiencing other issues in the Commissioning Wizard, refresh the web page. If issues persist, reboot Gateway using RESET button. If issues still persist after rebooting the Gateway, reset the Backup Switch using the RESET button. Updating Firmware CHECK INTERNET CONNECTION to verify Gateway network connection. Check for Update to verify you are on the latest ffrmware. Factory ffrmware ending in GF must be updated. Never power down or modify wiring during an update. During the update, the Gateway will reboot which will cause the “TEG-xxx” Wi-Fi to disconnect. When reconnected, refresh the web page. Conffguring Energy Meters Conduct all CT tests with at least 1 kW of power flowing. Ensure all solar inverters are monitored with CTs. When using only 1 CT for solar, select Solar (1CT x2) on the Current Transformers screen in the Commissioning Wizard. For each CT, select the applicable function on the Current Transformers screen and perform the following steps to ensure it is in the correct location and orientation: • Adjust the Amps/kW slider to see what the CTs are reading. • Verify the on-screen values for the CT against the applicable meter (such as the solar inverter meter or utility meter). • Ensure that: ◦ Site CTs are positive for import, negative for export. ◦ Solar CTs are positive when the PV array is producing power (Solar is NEVER negative during daytime). Negative power flow may indicate CT is installed on the wrong phase! 82Powerwall 2 AC Installation Manual • If the “toward source” CT label is correctly facing the solar inverter but power flow is negative, a voltage-current mismatch is likely. • Physically move the CT to the correct phase with the label facing the correct direction. Do not use the Flip checkbox in this case. Solar CTs should only meter generation sources. It is never recommended to meter both generation and loads using the Solar (1 CT x2) option. If it is absolutely necessary to install solar and a small amount of loads together without independent metering, you must install the solar CT on the phase without any downstream loads. Use a handheld clamp or fork meter to verify CT readings. Reset the Backup Gateway If experiencing issues with the Backup Gateway, reboot the Gateway using the RESET button (1 below). Power Cycle the System If resetting the Backup Gateway does not resolve issues, power cycle the system as follows. To power the system ofi : 1. Turn ofi solar equipment. 2. Turn ofi all Powerwalls. 3. Open breakers feeding Powerwall and solar. 4. Open breaker feeding Gateway. 5. Disconnect communication wiring. Reverse steps to power the system on. APPENDIX G: INSTALLATION TROUBLESHOOTING 83Powerwall 2 AC Installation Manual APPENDIX H: INSTALLING THE COLD WEATHER KIT The cold weather kit is for use on outdoor installations in cold climates to improve the performance of the Powerwall unit's Heat mode. The cold weather kit will be inefiective in extreme cold climates (classiffed as two or more consecutive days of -10°C temperature in a one year period). Always install indoors where possible for best system performance. Installing the Cold Weather Kit The cold weather kit (Tesla P/N 1766691-xx-y) must be installed before mounting Powerwall. Two people are required to complete this task. 1. Fill any air gaps between Powerwall and the wall (for instance those caused by mounting against an uneven surface like vinyl siding or a strut substructure) by mounting a sheet of cement board against the wall. This will provide an even surface for mounting Powerwall. NOTE: Use cement board or a material that meets all local building requirements and is appropriate for the installation location. The material must be at least as wide and as tall as the Powerwall back plate, but can be up to the same width and height as Powerwall. Ensure the fasteners used are of sufficient length so that they are embedded in the structural material. The fasteners must be long enough to penetrate the cement board and other ffnish materials and embed into the structural framing material per the minimum embedment dimension noted in Mounting Bracket Anchoring Details on page 50. NOTE: If Powerwall is being mounted against a smooth surface with no air gaps, no cement board is needed. 2. Stand up Powerwall so that it rests on its bottom edge. One person should hold the unit in this position. 3. Clean around the perimeter of the back plate with an alcohol wipe as shown below. 4. Allow one to two minutes to ensure the alcohol has dried before proceeding. 5. Cut foam strips and stick them along the perimeter of the back plate as shown below. The foam must cover the screw heads with no gaps between strips. ◦ When cutting the foam for the right side of the back plate, leave extra length to navigate curves around the wiring box. ◦ Install the foam strips 1 inch from the edge of the unit so that no foam is visible from the front of the unit. 84Powerwall 2 AC Installation Manual 6. Apply ffrm pressure along the foam strips to engage the adhesive. NOTE: The efiectiveness of the cold weather kit is dependent on Powerwall being installed against a perfectly flat wall with no obstructions behind the unit, as the foam strips are intended to seal the air gap between the unit and the wall. If Powerwall is floor mounted away from the wall, the cold weather kit will not be efiective in improving performance. APPENDIX H: INSTALLING THE COLD WEATHER KIT 85Powerwall 2 AC Installation Manual APPENDIX I: MULTI-POWERWALL INSTALLATIONS Electrical Equipment Sizing and Overcurrent Protection Overview This section describes the requirements for installation of multiple Powerwall units with a Backup Gateway in North America. Pre-Requisites for Design Before designing a Powerwall system with more than four Powerwall units: • AC line impedance must be measured at the installation site to ensure the utility grid connection is able to support the desired quantity of Powerwalls. If the required grid impedance is too high, the Powerwalls may not connect to the grid, resulting in undesirable operation. See Table 1 in this app note for required minimum impedance values. • Minimize Impedance: ◦ Install the Powerwalls as close as possible to the point of interconnection with the grid. The recommended maximum wire length is 33 ft (10 m). ◦ Install wires larger than required by code between the Powerwall generation panel and the point of interconnection with the grid. Example, if the design requires 3/0 AWG wire, use 4/0 AWG wire. • Tesla Certiffed Installers should submit their multiple Powerwall system designs and measured impedance values to Tesla for review by sending design documents to powerwalldesignreview@tesla.com. Copy your Tesla account manager on all submissions. • Designers must properly size overcurrent protection and loads to account for the full power potential of multiple Powerwalls. For example, a 10-Powerwall system is capable of discharging up to 50 kW of power. See design examples in Panel Conffguration and Breaker Sizing. • Multi-Powerwall installations may require larger Powerwall communication wire between the Backup Gateway and the Powerwall units. Please refer to the Powerwall 2 AC / Gateway Communication Wiring application note on communication cable requirements, as your install may require up to #16 AWG or 1.3 mm2 wire. • For systems between 11 to 20 Powerwalls, multiple Backup Gateways are required, as each Gateway can only control up to 10 Powerwall units. Please refer to the Multiple Gateways on a Single Site application note on the Partner Portal. • Grid impedance does not need to be measured for ofi-grid systems as there is no grid impedance to measure. 86Powerwall 2 AC Installation Manual Pre-Requisites for Installation Before installing and commissioning a multi-Powerwall system: • Plan for the commissioning process to take longer than a typical installation. It can take up to 3 minutes to complete the commissioning scan and verify process for each Powerwall, so a 10-Powerwall system can take up to 45 minutes during this stage of commissioning. NOTE: Do not interrupt a commissioning step, turn ofi the system, or unplug the communication wiring at any time during the commissioning process. Service Type and Capacity Requirements The Backup Gateway supports systems of up to 10 Powerwall units, but the maximum number of Powerwalls may be limited by the site electrical service, utility grid infrastructure, or local requirements; therefore an impedance test is required to conffrm. Line Impedance Requirements The sensitivity of the system to line impedance increases with the number of Powerwalls in the system. (See Impedance Requirements for Multi-Powerwall Systems on page 89for the maximum allowable impedance as it relates to number of Powerwalls.) If grid impedance at a site exceeds the maximum allowable value, do either of the following: • Decrease the impedance of the site grid connection. This may require coordinating with the local electrical utility. See “Minimize Impedance” in the Pre-Requisites for Design for suggestions. • Reduce the quantity of Powerwalls installed at the site to meet the maximum allowable impedance value. If impedance values exceed the requirement for the installed number of Powerwalls, the system may not function properly. Measuring Line Impedance To determine the line impedance at a site, measure between Line and Neutral where the Powerwalls will be interconnected to the site electrical system with testing equipment such as the following: • Fluke 1660 Series Installation Tester (1662, 1663, or 1664) • Metrel-MI3000 Multifunction Tester • Megger LTW315 Loop Impedance Tester APPENDIX I: MULTI-POWERWALL INSTALLATIONS 87Powerwall 2 AC Installation Manual Example Line Impedance Test Instructions For details on line impedance testing, refer to the test equipment manufacturer’s instructions. The steps below are general guidelines only. WARNING: Impedance tests must be performed on an energized electrical system. Impedance tests should be carried out only by trained electricians using appropriate safety equipment and safety practices. 1. Follow manufacturer instructions to calibrate and zero the impedance tester before taking measurements. 2. Complete the test on L1 ffrst, then move to L2. 3. Connect all three voltage test leads – Line, Neutral, and Ground 4. Follow manufacturer instructions to verify that the correct voltage is present. Switch the tester to a voltage measurement mode and check Line-to-Neutral and Line-to-Ground voltages. 5. Follow manufacturer instructions and take an impedance measurement where the Powerwalls will be interconnected to the site electrical system. Switch the tester to the appropriate impedance measurement mode and take the following readings: ◦ Line-Neutral ◦ Line-Ground NOTE: The Line-Neutral impedance measurement is the value referenced in Impedance Requirements for Multi-Powerwall Systems on page 89. 6. Record the impedance measurements. 7. Repeat steps 3-6 for L2. Recommended Interconnection Point for Large Multiple Powerwall Systems 1 Service Entrance 2 Meter 3 Main Panel NOTE: Impedance should always be measured at the point of Powerwall interconnection. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 88Powerwall 2 AC Installation Manual Table 14. Impedance Requirements for Multi-Powerwall Systems # of Powerwalls per site Maximum Grid Impedance, Line – Neutral 1 0.80 Ohms 2 0.40 Ohms 3 0.27 Ohms 4 0.20 Ohms 5 0.16 Ohms 6 0.13 Ohms 7 0.11 Ohms 8 0.10 Ohms 9 0.09 Ohms 10 *0.08 Ohms 11 to 12 **0.07 Ohms 13 to 14 **0.06 Ohms 15 to 17 **0.05 Ohms 18 to 20 **0.04 Ohms *Maximum number of Powerwalls supported for a single Gateway **11 to 20 Powerwalls require multiple Gateways APPENDIX I: MULTI-POWERWALL INSTALLATIONS 89Powerwall 2 AC Installation Manual Panel Conffguration and Breaker Sizing The Backup Gateway has a maximum continuous current rating of 200 A. In systems with 7 or more Powerwall units, to ensure sufficient ampacity while keeping total charge/discharge current within the 200 A capacity of the Backup Gateway, a separate generation panel (400 A minimum) with a 200 A main breaker is recommended. The example below shows the following: • 400 A main panel with a 200 A main breaker in the panel or in the Backup Gateway • 400 A generation panel with 200 A main breaker • Load panel w/ 200 A main breaker Example 400 A Service with Separate Generation and Load Panels 1 400 A Service 2 200 A Breaker in Backup Gateway 3 200 A Breaker (max) in 200 A Panel 4 Loads 5 200 A Breaker (max) in 400 A Panel 6 Solar 7 7 or more Powerwalls APPENDIX I: MULTI-POWERWALL INSTALLATIONS 90Powerwall 2 AC Installation Manual When wiring the load panel, ensure that combined loads do not exceed main breaker continuous or peak current ratings, whether the system is on-grid or ofi-grid. When the grid is operational, power can flow from both the grid and the generation panel to the load panel. Power Flow from Grid and Generation Panel when On-Grid 1 400 A Service 2 200 A Breaker in Backup Gateway 3 200 A Breaker (max) in 200 A Panel 4 Loads 5 200 A Breaker (max) in 400 A Panel 6 Solar 7 7 or more Powerwalls APPENDIX I: MULTI-POWERWALL INSTALLATIONS 91Powerwall 2 AC Installation Manual When there is a grid outage, power can flow from the generation panel to the load panel. Power Flow from Grid and Generation Panel when On-Grid 1 400 A Service 2 200 A Breaker in Backup Gateway 3 200 A Breaker (max) in 200 A Panel 4 Loads 5 200 A Breaker (max) in 400 A Panel 6 Solar 7 7 or more Powerwalls APPENDIX I: MULTI-POWERWALL INSTALLATIONS 92Powerwall 2 AC Installation Manual Multi-Powerwall Installations with the Stack Kit In the Powerwall Stack Kit Powerwall Stack Kit: Tesla P/N 1112154-00-x 1. (2) Side clips 2. (1) Top cover 3. (1) Conduit nipple 4. (2) Conduit insulation bushings 5. (2) Conduit sealing O-rings 6. (1) Bridge piece 7. (1) 6 mm Allen wrench 8. (1) Drill guide (two pieces) 9. (1) 5-conductor communication cable 10. (1) Wiring interface cover 11. (4) Magnetic camshaft caps Required Tools • Personal protective equipment (safety glasses, gloves, protective footwear) APPENDIX I: MULTI-POWERWALL INSTALLATIONS 93Powerwall 2 AC Installation Manual • Drill and 6 mm (1/4-inch) drill bit (for drilling pilot hole in Powerwall chassis) • 35 mm (1-3/8 inch) hole saw (for drilling conduit hole in Powerwall chassis) • Small metal ffle (for removing burrs from Powerwall chassis sheet metal) • Rubber mallet or small hammer and wood block (for seating side clips in Powerwall) • Wire strippers/cutters for 1.5 to 8 mm2 (24 to 8 AWG) wires • Large (5 mm) flathead driver bit (for Powerwall Earth terminal) • Small grease applicator (wooden craft stick or cotton swab) • Water-resistant heavy-duty grease (Dow Corning Molykote BR-2 Plus High Performance Grease or equivalent, for preventing corrosion on side clips) • Installation tools (level, tape measure, pencil, flashlight) Site Requirements Stacked multi-Powerwall systems must be floor-mounted and must be anchored to an adjacent wall. The wall must be capable of supporting the lateral load of the Powerwall stack. A maximum number of 3 floor-mounted Powerwall units may be joined together with two Powerwall Stack Kits. For systems with more than 3 Powerwalls, separate groups of 3 units should be assembled, with each group of 3 attached to a wall. For complete Powerwall Mechanical Speciffcations and Site Requirements, see Site Requirements and Pre- Installation Guidance on page 11. Figure 41. Dimensions for 2-unit and 3-unit Powerwall Stacks NOTE: Powerwall meets the unit level performance criteria of UL 9540A, allowing Powerwall to be stacked front to back as long as the clearance requirements deffned in this manual are followed to allow for air flow around the units. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 94Powerwall 2 AC Installation Manual Installation Instructions These instructions assume that at least one Powerwall has been installed and additional Powerwall units are being installed using the Powerwall 2 Stack Kit (Tesla P/N 1112154-00-x). See Plan the Installation Site on page 21 for complete installation instructions. Step 1: Prepare for Installation 1. Turn ofi the ffrst (previously installed) Powerwall by setting its On/Ofi switch to the OFF position. 2. Turn ofi the AC circuit breaker for the Powerwall. 3. Ensure that the second Powerwall is turned ofi by verifying that its On/Ofi switch is set to the OFF position. 4. Remove both side covers from each Powerwall to be joined. NOTE: On the ffrst (previously installed) Powerwall, it may be necessary to remove the small plastic insert at the bottom of the covers to help with removal. For the right (LED) side covers, do not disconnect the switch and LED leads. Turn the cover to one side and rest it against the Powerwall chassis. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 95Powerwall 2 AC Installation Manual 5. Using a T20 Torx bit, remove the wiring compartment covers from the previously installed Powerwall. Step 2: Choose a Wiring Option In multi-Powerwall systems, communication wiring is daisy-chained between Powerwall units. Power wiring is direct (home run) from each Powerwall to a dedicated circuit breaker in the electrical panel. Wiring between Powerwalls can be concealed, or run externally. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 96Powerwall 2 AC Installation Manual Concealed Wiring For concealed wiring, a hole is drilled from the front of the ffrst Powerwall into its wiring compartment and wires are run directly into it from the back port of the second Powerwall. To use this wiring method, proceed to Step 3, “Prepare for Concealed Wiring.” External Wiring For external wiring, wires are run through conduit or raceway that spans the wiring compartment ports on the side of each Powerwall. To use this wiring method, skip to Step 4, “Join the Powerwall Units.” Step 3: Prepare for Concealed Wiring 1. Disconnect all wiring from the wiring compartment of the ffrst Powerwall. 2. Locate the wiring interface cover and peel back the fflm to expose the adhesive on the cover gasket. With the gasket facing inward, place the cover over the interface board at the back of the wiring compartment. The cover is intended to protect the circuit board and its components from metal shavings while drilling into the wiring compartment. 3. Attach the included drill guide to the front of the ffrst Powerwall by bracing the inside half of the guide against the bottom of its wiring compartment. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 97Powerwall 2 AC Installation Manual 4. Clip the outside half of the drill guide to the inside half so that the guide engages the hem of the Powerwall enclosure. 5. While holding the drill guide to make sure it conforms to the edge of the Powerwall chassis, drill a 6 mm (1/4-inch) pilot hole using the small hole in the drill guide. 6. Remove the drill guide. 7. Drill the full-size 35 mm (1-3/8 in) hole with a hole saw, using the pilot hole as a guide. 8. File the edges of the hole to remove any burrs. 9. Clear the wiring compartment of all metal shavings and debris. 10. Remove the protective cover from the wiring compartment. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 98Powerwall 2 AC Installation Manual 11. If the ffrst Powerwall still has its protective fflm, remove the fflm. 12. Peel back the protective fflm from the feet of the second Powerwall before moving it into place. 13. Remove the plug from the back cable entry port of the second Powerwall and place it in the side cable entry port of the same Powerwall. Step 4: Join the Powerwall Units 1. Orient the second Powerwall about 2 cm (1 in) in front of the ffrst, with its back cable entry port facing the hole you drilled in the front of the ffrst Powerwall. 2. (Concealed wiring installations only) Do the following to bridge the gap between the Powerwall wiring compartments: ◦ Locate the bridge piece, conduit nipple, two O-rings, and two insulation bushings. ◦ Assemble the conduit nipple, bridge piece and O-rings. Center the bridge and O-rings on the nipple. NOTE: Orient the O-rings so that the sides with greater surface area (marked “Box Side”) point to the outside, toward the Powerwall chassis. ◦ Install the assembly between the two Powerwalls so it spans the two wiring compartments. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 99Powerwall 2 AC Installation Manual ◦ Thread an insulation bushing onto each end of the conduit nipple, but do not fully tighten the bushings. 3. (All installations) Locate a side clip, making sure the flange (with magnet) is positioned at the top and that the cams are rotated vertically in relation to the clip. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 100Powerwall 2 AC Installation Manual 4. Slide the side clip into the gap between the two Powerwalls so that its flanges engage the side hem of each enclosure. NOTE: The Powerwall enclosure hems have cutouts that mate with tabs in the clip. 5. Press the clip until it is flush with the sides of the Powerwalls. 6. Using the provided 6 mm Allen hex wrench, do the following: ◦ Turn the top cam 90 degrees clockwise until it clicks into place and stops rotating. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 101Powerwall 2 AC Installation Manual ◦ Turn the bottom cam toward the wall (toward the ffrst Powerwall) so that the cam indicator notch on the hex camshaft head points toward the wall, until the cam clicks into place. NOTE: The top cam is symmetrical and can be rotated in either direction to secure the side clip. The bottom cam must be rotated toward the ffrst Powerwall so that its stepped side (indicated by the notch on the hex camshaft head) engages the housing of one of the Powerwalls. 7. Repeat steps 3-6 to install a side clip on the other side of the Powerwalls. NOTE: If necessary, use a small rubber mallet or a hammer and wood block to gently tap the side clips so that they are fully seated in the hem of the Powerwall. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 102Powerwall 2 AC Installation Manual 8. Position the top cover across the gap between the Powerwalls so that its flanges engage the tops of each side clip. The cover is held in place by the magnets on the tops of the side clips. 9. (Concealed wiring installations only) Tighten the insulation bushing on each side of the conduit nipple to secure the bridge between the two Powerwall wiring compartments. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 103Powerwall 2 AC Installation Manual 10. Use the provided shims to ensure that the Powerwalls are level. NOTE: When joined, the units should be level within +/– 2 degrees side-to-side and within +/– 5 degrees front-to-back. Step 5: Wire the Powerwall Units 1. Connect the communication ports of the two Powerwalls by doing the following: ◦ Run the provided 5-conductor communication harness between the Powerwall wiring compartments. At the ffrst Powerwall, cut back the drain wire; the drain wire should be terminated only at the second Powerwall. NOTE: The orange conductor is unused in Powerwall 2 AC installations. ◦ Attach the provided Phoenix connector to one end of the harness, and attach the extra Phoenix connector that came with the Powerwall to the other end of the harness. See Appendix B: Wiring Reference on page 54 for additional wiring information. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 104Powerwall 2 AC Installation Manual ▪ Connect the communication OUT connector of the ffrst Powerwall to the communication IN connector of the second Powerwall. ▪ To ground the drain wire: ▪ Strip the end of the equipment grounding conductor lead and wrap the communication drain wire around the grounding conductor lead. ▪ Insert the drain wire and grounding conductor lead into the second Powerwall chassis ground lug. The ground lug is identiffed with the following symbol: ▪ Tighten the screw in the ground lug to 4.5 Nm (40 lb-in). NOTE: There will be a drain wire grounded in each Powerwall in the chain. For each pair of components (Gateway and ffrst Powerwall, ffrst Powerwall and second Powerwall, etc.), the drain wire is cut at the ffrst component and grounded at the second. Figure 42. Connecting Powerwall Communication Ports ◦ In the last Powerwall in the communication chain, plug the 4-pin Phoenix connector with the terminating 120-Ohm resistor into the top 4-pin socket (labeled “OUT”). 2. Connect each AC Powerwall to the main or sub electrical panel of the installation (depending on the system conffguration) according to the electrical service type. 3. On the Powerwall side, strip the ends of the wires and attach them to the corresponding leads on the 3-pin AC power harness. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 105Powerwall 2 AC Installation Manual 4. Plug the AC power harness into the AC connector in the Powerwall wiring compartment. Ensure that the connector clicks into place. NOTE: Each Powerwall connection to the main electrical panel requires an independent 30 A circuit breaker. This breaker serves as the disconnect for the Powerwall, and must be wired in accordance with local wiring codes and regulations. 5. Reconnect the power and communications leads that were disconnected from the ffrst Powerwall at the beginning of the installation. Step 6: Close the Wiring Compartments and Replace the Covers 1. Arrange the communication and AC power wires inside the Powerwall wiring compartments. 2. Ensure that all conduit junctions and cable entry points are secure and properly sealed. 3. Replace the wiring compartment cover on each Powerwall. Ensure that the cover seats properly on the gasket so that the compartment is sealed. Tighten the fasteners using a Torx T20 bit. Torque to 1.5 Nm. 4. Replace each of the side covers on the Powerwalls by pushing the top into place and working toward the bottom to reattach it to the clips along the length of the unit. 5. (Optional) In humid or rainy climates, or in locations where the installation may be exposed to salt, fog, or other corrosive elements use a small applicator (such as a wooden craft stick or cotton swab) to apply a generous bead of heavy duty water-resistant grease around the outside edge of each camshaft head where it contacts the side clip. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 106Powerwall 2 AC Installation Manual 6. Place a magnetic camshaft cap on each of the four hex camshaft heads Step 7: Turn On and Commission the System 1. Switch on the AC circuit breakers for the Gateway and each Powerwall. 2. Switch on each Powerwall by moving the switch on the right (LED) side of the unit to the ON position. When each Powerwall establishes communication with the Gateway, the LED on the right side of Powerwall illuminates. 3. See Commission the System on page for instructions on updating system ffrmware and commissioning the system. NOTE: During commissioning, ensure that when scanning for Powerwalls, the Commissioning Wizard shows all Powerwalls in the system. 4. After installation is complete, remove the protective fflm from the second Powerwall. APPENDIX I: MULTI-POWERWALL INSTALLATIONS 107Powerwall 2 AC Installation Manual APPENDIX J: INVERTER SETTINGS Inverter settings must be conffgured in advance by Tesla. Talk to your Tesla representative if any of the default settings should be modiffed. The defaults for the inverter follow each region's grid code. Response to Abnormal Frequencies requirements for abnormal operating performance Category II & Category III NOTE: Any changes to the set points require approval from the local AHJ. Shall Trip Category II & III Shall Trip Function Default Settings Ranges of Allowable Settings Frequency (Hz)Clearing Time (s)Frequency (Hz)Clearing Time (s) OF2 62.0 0.16 61.8-66.0 0.16-1000.0 OF1 61.2 300.0 61.0-66.0 180.0-1000.0 UF1 58.5 300.0 50.0-59.0 180.0-1000.0 UF2 56.5 0.16 50.0-57.0 0.16-1000.0 Response to Abnormal Voltage requirements for abnormal operating performance Category II & Category III Shall Trip Category II Shall Trip Function Default Settings Ranges of Allowable Settings Voltage (p.u. of Nominal Voltage) Clearing Time (s)Voltage (p.u. of Nominal Voltage) Clearing Time (s) OV2 1.20 0.16 Fixed at 1.2 Fixed at 0.16 OV1 1.10 2 1.10-1.20 1.0-13.0 UV1 0.70 10 0.0-0.88 2.0-21.0 UV2 0.45 0.16 0.0-0.50 0.16-2.0 Shall Trip Category III Shall Trip Function Default Settings Ranges of Allowable Settings Voltage (p.u. of Nominal Voltage) Clearing Time (s)Voltage (p.u. of Nominal Voltage) Clearing Time (s) OV2 1.20 0.16 Fixed at 1.2 Fixed at 0.16 OV1 1.10 13.0 1.10-1.20 1.0-13.0 UV1 0.88 21.0 0.0-0.88 21.0-50.0 UV2 0.50 2.0 0.0-0.50 2.0-21.0 108Powerwall 2 AC Installation Manual Accuracy Trip Setting Accuracy Voltage +/- 1% of nominal voltage Frequency +/- 0.01 Hz Reconnection Time 1% of set point Trip Time 0.032 s for <5 s 1% of set point for >5 s Active Power +/- 5% of rated apparent power Reactive Power +/- 5% of rated apparent power APPENDIX J: INVERTER SETTINGS 109Powerwall 2 AC Installation Manual Volt Watt Capabilities Table 15. IEEE 1547-2018 Capabilities Voltage-Active Power Parameters Default Values (p.u)Range (p.u) V1 1.06Vn 1.05-1.09 P1 1.0 1 V2 1.1Vn 1.1 P2 0 0 P’2 0 0 - -1 Response Time 10s 0.5-90 Table 16. UL 1741SA Capabilities Description 240V (Split Phase)208V Output power rating (W)5000 4500 AC voltage range with function enabled (Vac)247.2 - 288 214.24 – 249.6 Nominal AC voltage (Vac)240 208 Manufacturer's stated output power accuracy (%)±5 ±5 Manufacturer's stated time accuracy (sec)0.1sec 0.1sec Settling time (sec)0.5 to 90 0.5 to 90 Frequency Watt Capabilities Table 17. IEEE 1547-2018 Capabilities Parameters Category II Category III dbUF(Hz)0.036 0-1 dbOF(Hz)0.036 0.017-1.0 KOF, kUF 0.05 0.02-0.07 Tr(s)5 0.2-10 Table 18. UL 1741SA Capabilities Description 240V (Split Phase)208V Output power rating (W)5000 4500 Settling time (sec)0.2 to 10 0.2 to 10 APPENDIX J: INVERTER SETTINGS 110Powerwall 2 AC Installation Manual Watt-Var Capabilities Active Power -Reactive Power Parameters Default Values (p.u)Range (p.u) P3 1.0 1.0 P2 0.5 0.5 P1 0 0 P’1 0 0 P’2 -0.5 -0.5 P’3 -1.0 -1.0 Q3 -0.44 0.25-0.44 Q2 0 0-0.44 Q1 0 0-0.22 Q’1 0 0- -0.22 Q’2 0 0- -0.44 Q’3 0.44 -0.25- -0.44 APPENDIX J: INVERTER SETTINGS 111Powerwall 2 AC Installation Manual Volt-Var Capabilities Table 19. IEEE 1547-2018 Capabilities Voltage -Reactive Power Parameters Default Values Range p.u VRef Vn 0.95-1.05 V2 0.98Vn 0.93-1.04 Q2 0 0.5- -0.5 V3 1.02Vn 0.96-1.07 Q3 0 0.5- -0.5 V1 0.92Vn 0.88-1 Q1 0.44 1- -1 V4 1.08Vn 1-1.1 Q4 -0.44 1 - -1 Table 20. UL 1741SA Capabilities Description Value (240V Split Phase)Value (208V) Apparent power rating (VA) 5800 5200 Output power rating (W) 5000 4500 Nominal AC EPS voltage (V) 240 208 AC EPS voltage range with function enabled (Vac)196.8-283.2 170.56-245.44 Max rated reactive Power (capacitive, overexcited) (VAr)2900 2633 Max rated reactive Power (inductive, underexcited) (VAr)-2900 -2633 Settling Time (sec)1-90 1-90 Ramp Characterization Parameters Description Value (240V Split Phase)Value (208V) Output current rating (Aac)20.83 21.63 Minimum normal ramp-up rate (%Irated / sec)1 1 Maximum normal ramp-up rate (%Irated / sec)100 100 Output current range of function (%Irated)0% to 100%0% to 100% Ramp rate accuracy (%Irated / sec)2%2% APPENDIX J: INVERTER SETTINGS 112Powerwall 2 AC Installation Manual APPENDIX K: REVISION LOG Revision Date Description 1.0 2020-05-23 Initial release 1.1 2020-06-26 • Added Powerwall and Backup Gateway 2 speciffcations • Updated multi-Powerwall communication wiring instructions for clarity 1.2 2020-08-10 • Noted breaker requirement when wiring Optional Internal Panelboard to Non-Backup lugs (see Install Optional Internal Panelboard in the Backup Gateway on page 33) • Added Optional Internal Panelboard terminal wire gauges to Wire Reference 1.3 2020-09-30 Corrected stack kit dimensions 1.4 2020-12-15 • Added warning to allow the Backup Gateway a full minute to complete its boot sequence before power cycling or resetting it (Close the Wiring Compartments and Turn the System On on page 46) • Added minimum clearance above Backup Gateway • Updated to include Powerwall part number 3012170-xx-y • Added note on maximum input channel current that can be measured by each CT when two CTs are used in parallel (Current Transformer Capacity on page 71) 1.5 2021-06-23 • Updated Installing a Neurio Energy Meter appendix to include the Neurio W2 meter and accessories • Updated Mounting Bracket Anchoring Details on page 50 to include brick, updated concrete and masonry section 1.6 2021-06-27 • Added information about the Panel Limit Feature on page 38 1.7 2021-12-14 • Added note to ensure sufficient working space around wiring compartment • Updated Powerwall Optimum Temperature Range on page 13 to reflect that installing Powerwall outside of direct sunlight is a recommendation but not a requirement 1.8 2022-01-13 Added Appendix H: Installing the Cold Weather Kit on page 84 1.9 2022-07-11 • Updated instructions in Installing the Cold Weather Kit on page 84 to include a step to ffll any air gaps between Powerwall and the wall if mounting to an uneven surface 1.10 2023-01-04 • Updated Powerwall Specifications on page 6 and added Appendix J: Inverter Settings on page 108 with additional Compliance information • Updated Plan Distance Between Components on page 22 and Wired Communication to the Backup Gateway on page 68 to reflect that Neurio W2 meters can be connected to the Gateway via RS-485 wiring 113Powerwall 2 AC Installation Manual Revision Date Description • Updated Acceptable Circuit Breakers on page 58 to include new alternate branch breakers • Updated Commission the System on page 48 to include link to Setup App commissioning instructions APPENDIX K: REVISION LOG 114Powerwall 2 AC Installation Manual Published January 2023 Revision 1.10