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.

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Warning
All Powerwalls in the system must be installed on the ‘Backup’ ('Home') side of the Backup Gateway’s relay.
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Warning
When Powerwall is installed in a dwelling unit, fire detection and protection equipment should be installed in accordance with local building and fire codes.
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Warning
Do not connect the Backup Gateway in any way that bypasses or short-circuits its relay.
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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.
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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.
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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.
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CAUTION
The Manual Override switch inside the product may not be used to simulate a grid outage or take home off-grid. A main isolation switch should be installed upstream of the Backup Gateway for testing the system and for service purposes.
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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 configured 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.

Figure 1. Powerwall 2 AC and Backup Gateway 2 Dimensions