Appendix N: Revision Log


Revision	Date	Description
1.0	2021-04-20	Initial release
1.1	2021-05-16	Added UL 1741 PCS requirements to energy metering section Added Neurio meter installation appendix
1.2	2021-06-01	Updated multi-Powerwall+ wiring instructions Corrected minimum fastener size in Mounting Bracket Anchoring Details
1.3	2021-06-24	Corrected Powerwall+ weight Updated Mounting Bracket Anchoring Details to include brick, updated concrete and masonry section
1.4	2021-06-27	Added information on Panel Limit Feature
1.5	2021-08-05	Updated Install Mid-Circuit Interrupters in PV Array to include Tesla solar modules Updated STEP 7: Install System Shutdown Switch to clarify wiring options and resulting functionality Added instructions to Unplug Solar Assembly Site Controller Power Harness Updated Finish and Demonstrate the Installation to clarify that the Powerwall+ breaker should be left ON and the Powerwall+ Enable switch should be turned OFF
1.6	2021-08-23	Updated Finish and Demonstrate the Installation to clarify that the Powerwall+ Enable switch should be turned ON at end of installation
1.7	2021-10-12	Updated with latest Compliance information Added instructions for multi-Powerwall+ installations
1.8	2021-11-03	Updated Appendix K: Multi Powerwall+ Installations to reflect latest wiring guidance when Powerwall+ is connected to another Powerwall+ or Powerwall 2 Added terminal temperature ratings to Solar Assembly Wiring and Backup Gateway 2 Wiring
1.9	2021-12-15	Updated STEP 7: Install System Shutdown Switch to reflect System Shutdown Switch functionality with software version 21.39.1 and later Added new Emergency Stop switch components to Recommended Switch Components in STEP 7: Install System Shutdown Switch Added note to ensure sufficient working space around wiring compartment Updated Powerwall+ Operating Temperature Range to reflect that installing Powerwall+ outside of direct sunlight is a recommendation but not a requirement
1.10	2022-01-13	Added Appendix J: Installing the Cold Weather Kit
1.11	2022-02-16	Updated Stacked Installations to reflect that Powerwall+ can be stacked with only one Powerwall Corrected type and size of screwdriver required to spring wiring terminals for Powerwall+ AC and DC wiring terminals (up to 3 mm or 3/32 inch cabinet tip or electronics tip slotted screwdriver) and communications wiring terminals (up to 3 mm or 1/8 inch cabinet tip or electronics tip slotted screwdriver) Updated Install Mid-Circuit Interrupters in PV Array to reflect that systems using certified PV modules and mounting systems are covered by Tesla's UL 3741 certification if they are in compliance with the PVHCS listing instructions
1.12	07-11-2022	Updated Maximum Short Circuit Current per MPPT in Powerwall+ Specifications Added instruction to install solar assembly door after mounting to confirm alignment of solar assembly to battery assembly Added diagram with distance from center of each solar assembly knockout to ground in Choose Solar Assembly Cable Entry Updated instructions in Appendix J: Installing the Cold Weather Kit to include a step to fill any air gaps between Powerwall and the wall if mounting to an uneven surface
1.13	10-07-2022	Updated Plan Distance Between Components and Wired Communication to the Backup Gateway to reflect that Neurio W2 meters can be connected to the Gateway via RS-485 wiring
1.14	01-26-2023	Updated STEP 7: Install System Shutdown Switch to reflect system behavior for all systems on Powerwall software version 21.39.1 or later; for earlier software versions, system behavior is described in Rapid Shutdown Initiation Updated Perform Device Setup to include link to Device Setup in Tesla One instructions Updated Acceptable Circuit Breakers to include new alternate branch breakers Updated Mount the Solar Assembly to reflect that only the existing knockouts are to be used, and drilling into the enclosure is not an accepted installation practice
1.15	03-03-2023	Corrected Maximum Input Short Circuit Current in Mid Circuit Interrupter Specifications (P/N MCI-1) PV Rapid Shutdown Equipment (PVRSE) Updated Mount the Solar Assembly to reflect that installers should not drill into the top of the enclosure Updated Acceptable Branch Circuit Breakers for Internal Panelboard to reflect that the breakers listed are acceptable for use in the Backup Gateway internal panelboard Updated Choose a Location and Site Requirements to reflect that, when floor-mounting Powerwall+ (including installing a stacked configuration), Powerwall must be installed on a structurally sound flat surface that supports both feet of each unit.
1.16	04-21-2023	Added Concrete Pad Details for Ground-mounting Powerwall+ on Poured Concrete with an Existing Structural Wall and Anchoring and Concrete Pad Details for Ground-mounting Powerwall+ on Poured Concrete with Steel Posts to provide additional guidance on constructing a concrete pad for mounting Powerwall+
1.17	06-22-2023	Updated Powerwall+ Specifications and Powerwall+ Operating Temperature Range to reflect that Powerwall+ is designed to operate in all climates, in direct sunlight, for temperatures of –4°F to 122°F (-20°C to 50°C) Added Mid Circuit Interrupter Specifications (P/N MCI-2) PV Rapid Shutdown Equipment (PVRSE) specifications Added MCI-2 to Install Mid-Circuit Interrupters in PV Array and updated Installation Best Practices to reflect the latest maximum DC circuit length Updated Install Mid-Circuit Interrupters in PV Array with links to PVHCS compliance documents Updated Close the Wiring Compartments and Turn the System On to reflect that the Powerwall+ Enable switch can be locked, and cannot be switched on when locked Added Powerwall+ Anchoring Details and updated Concrete Pad Details for Ground-mounting Powerwall+ on Poured Concrete with an Existing Structural Wall and Anchoring and Concrete Pad Details for Ground-mounting Powerwall+ on Poured Concrete with Steel Posts for clarity on constructing a concrete pad for mounting Powerwall+ Updated Acceptable Branch Circuit Breakers for Internal Panelboard to reflect that Eaton BR branch breakers up to 125A are acceptable for use in the Backup Gateway internal panelboard Updated Plan Internet Connection for Backup Gateway 2 to reflect that, when Powerwall+ is installed with Backup Gateway, Ethernet can only be connected to the Gateway (not Powerwall+) Updated references to legacy Commissioning Wizard throughout manual to reflect the new Device Setup interface in Tesla One (see Performing Device Setup in Tesla One for more information)
1.18	08-31-2023	Updated Make Powerwall+ AC Power Connections to clarify that a 50 A circuit breaker is the recommended overcurrent protection device for Powerwall+ Added Appendix L: Shutting Down Powerwall+ to provide clear instruction on safely shutting down the system for emergency response or maintenance Updated Servicing the Solar Assembly to clarify that the System Shutdown Switch must be pushed to initiate Rapid Shutdown before performing service
1.19	10-12-2023	Added specifications for custom communication cable to Required Supplies Added caution to avoid twisting MCI-2 MC4 connectors to Install Mid-Circuit Interrupters in PV Array
1.20	01-16-2024	Added Supported System Configurations to Specifications Updated references to Tesla Pros to Tesla One to reflect latest app experience
1.21	03-17-2024	Updated Powerwall+ Specifications to reflect an updated Maximum Short Circuit Current per MPPT (I_sc) of 19 A Updated Mid Circuit Interrupter Specifications (P/N MCI-1) PV Rapid Shutdown Equipment (PVRSE) to reflect an updated Nominal Input DC Current (I_MP) of 13 A Updated Install Mid-Circuit Interrupters in PV Array to include guidance for Solar Roof V3R systems and UL 3741 listed IronRidge systems Updated UL 1741 PCS Requirements to reflect Export Only ESS Operating Mode.
1.22	04-29-2024	Updated MCI Locations to include guidance for Ecofasten systems, updated section for clarity
1.23	07-02-2024	Updated Maximum Output Fault Current and added Maximum Short-Circuit Current Rating in Powerwall+ Specifications Added Maximum Disconnect Voltage to Mid Circuit Interrupter Specifications (P/N MCI-1) PV Rapid Shutdown Equipment (PVRSE) and Mid Circuit Interrupter Specifications (P/N MCI-2) PV Rapid Shutdown Equipment (PVRSE) Updated Install Mid-Circuit Interrupters in PV Array with warning that where it is allowable to install only (1) MCI per string, MCI-1 must be used
1.24	07-24-2024	Updated Mid Circuit Interrupter Specifications (P/N MCI-1) PV Rapid Shutdown Equipment (PVRSE), Mid Circuit Interrupter Specifications (P/N MCI-2) PV Rapid Shutdown Equipment (PVRSE), and Install Mid-Circuit Interrupters in PV Array with link to UL 3741 Application Addendum for complete list of systems that have been certified to UL 3741 when installed together with Powerwall+ and Tesla MCI
1.25	10-25-2024	Updated Mid Circuit Interrupter Specifications (P/N MCI-2) PV Rapid Shutdown Equipment (PVRSE) to include MCI-2 High Current current ratings