Tesla Powerwall 3 Installation Manual with Backup Gateway 2 v1.8

Description

Powerwall 3 Installation Manual with Backup Gateway 2

SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE

Ensure Installation Meets All Local Codes and Requirements

Powerwall 3 comes with a Backup Gateway 2 to enable integration with the electrical grid. Powerwall 3 communicates with Backup Gateway 2 by means of a wired connection; wiring and conduit (where required) must be provided by the installer and installed to comply with local codes.

WARNING: When Powerwall 3 is installed in a dwelling unit, fire detection and protection equipment should be installed in accordance with local building and fire codes.

WARNING: Powerwall is not intended for installation in habitable spaces and living spaces in dwelling units.

WARNING: Install Powerwall in a location that prevents damage from flooding.

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: Ensure that no water sources are above or near Powerwall, including downspouts, sprinklers, or faucets.

CAUTION: Ensure that snow does not accumulate around Powerwall.

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: Tesla does not recommend installing Powerwall and Backup Gateway in direct sunlight.

CAUTION: The Backup Gateway may not be recessed into a wall or cavity.

NOTE: Powerwall 3 systems must have a grid connection. Fully off-grid systems are not supported

NOTE: All installations must conform to the laws, regulations, codes, and standards applicable in the jurisdiction of installation.

APPENDIX F: SHUTTING DOWN POWERWALL 3

Powerwall 3 system shutdown for emergency response or maintenance requires system shutdown and disabling solar output.

CAUTION: Open all third party solar inverter breakers or handled disconnects before shutting down the Powerwall 3 system.

Safely Shut Down Powerwall 3 for Maintenance or Service

Turn the Powerwall 3 On/Off switch OFF.

NOTE: Powerwall 3 Expansion units are connected to Powerwall 3 via a factory-made harness. They are not connected to a breaker and they do not have an on/off switch; when Powerwall 3 is turned off, any Expansion units will automatically shut down.

Turn the Powerwall 3 integrated DC isolator switch OFF.
Open the Powerwall 3 AC circuit breaker.
Wait 30 seconds before proceeding with any work.

WARNING: Risk of electric shock from stored energy. Wait 30 seconds after disconnecting all sources of supply before proceeding.

Use a lock-out device on the disconnecting means listed in the table below whenever performing work on equipment that is not within sight of the switch.

Disabling Solar, System Shutdown, and Disconnecting Means for Powerwall 3

Action	Powerwall 3				AC-coupled Solar Inverter
Action	On/Off Switch	Integrated DC Isolator	AC Breaker / Isolator	External DC Isolator	AC Breaker / Isolator
Disables Expansion Units	Yes	No	No	No	No
Disables DC-coupled Solar	Yes	Yes	No	Yes	No
Disables AC-coupled Solar	No	No	No	No	Yes
Disables AC Inverter (Input and Output)	Yes	No	Yes	No	No
Isolates DC side for maintenance	No	No	No	Yes	Yes
Isolates AC side for maintenance	No	No	Yes	No	No

APPENDIX G: TROUBLESHOOTING

Situations in Which Powerwall 3 Stops Grid Forming

Some situations in which the Powerwall will not be allowed to grid-form are:

The Powerwall 3 On/Off switch is switched OFF.
An open circuit between any Powerwall and the Backup Gateway. Example: an open Powerwall AC breaker.
Excessive voltage drop between any Powerwall and Backup Gateway. Example: poor connections at AC wire terminals or wiring damage between Powerwall and Gateway.
Loss of communications between any internal system or meter (for instance loss of communication with Backup Gateway 2).

Earthing

When operating off-grid, the Backup Gateway 2 forms a local TN-S supply to the connected distribution board(s):

Relationship of power system to earth: T – Direct connection of one point to Earth – this is provided by the local earth, connected into the main earthing terminal
Relationship of the exposed conductive parts to Earth: N – Direct connection to the earthed point (neutral) of the power supply system - this is facilitated by the local N-PE bond created within the Gateway during off-grid operation
Arrangement of neutral and protective conductors: S - Separate conductors - separate neutral and protective conductors are connected between the Gateway and downstream distribution board(s)

Proper earth connection and Neutral-to-Earth (N-PE) bonding during on-grid and off-grid operation is required for safe operation of the Powerwall system and for compliance with local code requirements. For instruction regarding the switched earth connection, refer to Verify Neutral-Earth Bonding Scheme on page 58.

WARNING: To ensure safe operation when operating off-grid, a local earth must be present on the site, such as by earth rod or ground electrode. During a grid fault it cannot be assumed that the DNO's Earth or PEN conductors are intact. Installation of earth rod must comply with local codes.