Export to SCE in So Cal?

Export to SCE in So Cal?

Hi All-

Anyone have experience exporting power back to SCE in So Cal? Can this be done with a Powerwall as well?


lilbean | July 28, 2018

I’d rather keep it since SCE is so unreliable.

cwied | July 29, 2018

I don't think Powerwalls are set up to export power in the US. You can offset house load and export all your solar power if you have a PV system, though.

scottman | July 29, 2018

Still trying to figure this out. Is the thinking...

Peak daytime --> Solar exports to SCE for $++
Peak daytime --> Powerwall powers the house
Offpeak nighttime --> Grid recharges the powerwall

cwied | July 31, 2018

Not quite. There's an additional restriction in the US that Powerwalls installed with solar will only charge from solar. This is to preserve eligibility for the 30% tax credit. So:
Offpeak daytime -> Powerwall charges from solar
Peak daytime -> Powerwall powers the house, all solar is exported.

This is assuming you're using the time-based mode. There is also a self-consumption mode that just attempts to use your solar as much as possible. There are two sub-modes for the time-based mode that change how the Powerwall deals with part-peak during the day.

Here's a vague description of the modes: