Load Shedding Feature
Overview
Beginning with Powerwall software version 25.2 and Tesla One version 12.32, Powerwall 3 allows for load shedding, meaning a low voltage, dry contact 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 Powerwall 3 Aux wiring terminals so that the load can be shed when the Powerwall system 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 in the backup panel.
Wiring the System for Load Shedding
- Route the low voltage cable to the equipment that is being load shed (in the example below, the cable is routed to the condenser).
- Identify the two existing low voltage control wires at the condenser (in the example below, these wires connect the thermostat to the condenser).
- Remove only one of the low voltage control wires (either wire can be removed).
- Splice the low voltage control wire to one wire from the low voltage cable that was routed to the condenser in Step 1.
- Terminate the second wire from the low voltage cable at the condenser (where the wire was removed in Step 3).
- Route the opposite end of the
low voltage cable to Powerwall 3 and connect the wires
to the Aux
connector.NoteSee Aux Wiring for wiring specifications.
| 1 | Air handler unit |
| 2 | Thermostat |
| 3 | Condenser |
Configure Load Shedding in Device Setup
The load shedding feature must be configured during device setup; see the Powerwall 3 Device Setup Guide for complete instructions to configure the system.
- Select Advanced Settings from the Settings screen.
- Select TACO Load Control Relay.
- Select Off-grid Load Shedding from the Configuration Type menu, then select Done.