It's more about space heating here. ...and air conditioning and hot water. ...and cooking.
...and the little Raspbeerry Pi that is my connction to the world.
But since I wrote that at 10:48 AM everything has changed.
ecomodder.com/.../software-defined-power
I ranted about this before when it was theoretical, now it's being rolled out in California by Tesla.
I need the Powerwall because it's the hardware platform for the Virtual Power Plant, but my situation calls for a standing seam metal substrate. Those panels are half the cost, too.
The local utility has to be onboard, but I can be ready for them and sell peaker power into my neighborhood.