I have a 30kW solar array and want to install 2-4 Powerwalls. We live in an old stone farmhouse, so for ease of running wires there are two 200 amp panels inside the house.
We never draw close to 200 amps even with everything powered on including heat, hot water, kitchen, car charging, all lights, etc.
The house is supplied with a single 200amp disconnect wired off our main 600 amp panel. This is a farm, so the main panel distributes to the entire property.
I'd like Tesla to backup the 200amp disconnect, as that would provide whole home backup, but they don't want too because that disconnect feeds the two 200 amp sub panels.
They say it can be done, but they don't like it so they won't. They want to instead break down the 4 Powerwalls into 2 gateways.
Doing this would require I rewire my solar into 2 feeds to split to each gateway evenly, and since the Powerwalls are split I lose capacity.
Having 1 Gateway and multiple Powerwalls gives me extra power capacity to the whole home backup, and extra storage for my oversized solar array.
Smaller energy storage will start and stop charging during a grid disconnect event, where as more capacity allows more charging and discharge.
To add insult, Tesla Energy doesn't know how Powershare will integrate into their system at all. They hope I could save cost and only purchase 2 Powerwalls and the Cybertruck will act as an additional 3-5 Powerwall storage capacity when plugged in, but they don't know any details at this time.
For now, I'm trying to start with a Powerwall system until my Foundation Series truck arrives in the next 90 days.
Has anyone ever fed two 200amp subpanels off a primary 200amp disconnect with a single gateway?