2025-03-06

Install Powerwall and Generation Breakers in the Backup Gateway

  1. Install the Powerwall and generation circuit breakers on the DIN rail, and connect using an appropriately rated DIN rail circuit breaker busbar.
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    Warning
    All Powerwalls in the system must be installed on the 'Backup' ('Home') side of the Backup Gateway's relay.
  2. Connect the line conductors from the bussed generation circuit breakers to the Backup Gateway’s Backup terminals (see figure below). These conductors must be appropriately rated to carry the current of the main supply fuse.
  3. Connect Neutral and PE conductors from Powerwall and generation circuits to the Neutral and PE wiring bars, respectively.
    Figure 1. Single Phase Wiring Example

    Design Considerations

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    CAUTION
    If installing greater than 100 A of generation, a separate overcurrent protection (such as a generation sub-board) is required to maintain maximum current rating of the Backup Gateway.

    The Backup Gateway 2 can accommodate up to nine (9) 1-pole MCB slots on the DIN rail for generation circuits and fuse carrier(s).

    The Powerwall connection to the Backup Gateway requires a 63 A circuit breaker. This breaker serves as circuit protection for the Powerwall, and must be wired in accordance with local wiring codes and regulations.

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    Note
    Some regions may require use of an external Residual Current Device (RCD) / Residual Current Circuit Breaker with Overcurrent Protection (RCBO) on the solar PV inverter and/or Powerwall circuits. Refer to Residual Current Devices (RCDs) / Residual Current Circuit Breakers with Overcurrent Protection (RCBOs) for additional guidance.