Thought I'd share how I have too much power to use or store (8.19kW, west facing, 2PWs). It's been this way for about a month where I'm not needing the grid (maybe I should have just thrown the main switch). All driving, all rainstorms, everyday. And it's been raining every week here.
This shows my most recent 2 months, then compare to last year below. Both had 1 Tesla charging at home. I did not expect this, however, summer's not here yet either. Most of what I do now is shift activities and maybe that's what's not captured in the ROI calculations. That, and I just replaced all my yard lights with LEDs. December wasn't so easy, so I imagine I'll take on different strategies by season.
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I just changed my plan from E-29 to E-26. I was over producing off-peak and still having to pay all of the super off-peak energy. E-26 is back to peak/off-peak and my bill is down considerably. You might think about doing this also.