I'm up in the East Bay hills in a Tier II zone, plus we had more than 2 PSPS events last year. We also are on Medical Baseline for a CPAP machine.
I really appreciate all the replies! Looks like we're going to move forward with the two Powerwalls, then add some panels down the road if we have issues keeping them charged.
Welcome to the TMC. Enjoy your stay.
Do add more panels now as it will cost you more later on as a separate transaction. Aim for at least 100-110% of your actual use to account for solar degradation.
The additional equipment (Powewalls, gateway, solar inverters) consume power and there are in-and-out inefficiencies (about 10% loss) for the Powerwalls. Roughly each Powerwall consumes about one solar panel worth of electricity a year.