Load Shedding

Overview

The Backup Gateway allows for load shedding, meaning a low voltage control circuit can be wired to control a specific 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 off-grid.

When load shedding has been configured and the Powerwall system is on-grid, the low voltage control circuit is closed and the load is powered. When the system is operating off-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 for wiring specifications

Note

The load shedding feature is not applicable to permanently off-grid Powerwall systems. Permanently off-grid systems use the Backup Gateway Aux terminals for generator control rather than for load shedding.

Note

To activate this feature during device setup:

Select Advanced Settings from the Settings screen.
Select Low Voltage Relay Control.
Select Off-grid Load Shedding from the Configuration Type menu and select Done.

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 firmware updates and under abnormal fault conditions.

Note

The load shed relay is rated up to 60 V (DC or AC) and 2 A.