I've had solar for over a year and recently installed 2 powerwalls to go along with it.
For some reason, the installer couldn't do a partial house backup (we have various stuff on different subpanels throughout the house), so it had to be full house backup. The house is 100% electric, with heatpumps, a pool and a couple of electric cars, meaning we often go above the 10kw that the 2 powerwall can supply. Would have been nice to have figured that earlier, but that's where we are...
I was wondering what the cost is to add a couple of powerwalls to my existing setup... I'm expecting some of the one time installation costs are not needed this time around... Right? Permitting, installation cost should all be minimal too, or am I too optimistic?