yep just the normal power grid to charge it

Powerwall was FULL by 2am and would have sat idle until the grid went down at 4am, then the 100% battery took over and ran the house for the next 15 hours.

Much clearer now. That means, nothing is wrong with the battery like I mentioned earlier.

If we had a bad day for solar generation then the powerwall level will suffer, we had a bad day yesterday for generation

Yeah, I get it. Low sunny days aren't sweet days for solar owners..., it's a general pandamic 😀

But even with that, there is no better steady electricity like solar in your home!