I like this system a lot. It convert postmoterns into actionable checklist for next project. My only concern is that the checklist might get too big. But definitely, better than expecting people to go to wikis to avoid past mistakes

2 questions: - If you opt-out of the powerwalls can the system switch to the regular grid when needed? - Can you sell energy back to the regular grid in case you produce more than you need?

Yes you can switch to the regular grid and yes you can sell back your power in most states ("net metering"), though that often just manifests as a credit for your night time electricity usage.

38 states, DC, and Puerto Rico allow this. https://www.seia.org/initiatives/net-metering

Last I heard from PSEG, anyone who produces extra energy is just given a credit towards their next bill, there is no redeemable cash value. Not bad though :)

It depends on your local power grid. Sometimes yes, you can sell it back.

That’s a great idea. I’ll look into it.