miimura
Well-Known Member
If you want to dark start the system with the "3V Gateway" you need a Universal Wall Connector with the low voltage wire. That wire has two functions, providing DC power to the Gateway so the Gateway computer can boot up without AC power, and whatever RS485 communication is required for the Gateway to tell the truck that it's safe to start providing AC power.Good point.
I just find it hard to believe the Universal Wall Connector needs communication wires to the 3 V Gateway, but the v2 Wall Connector does not to any of the Powerwall gateways. It must have something to do with how it handles the neutral.
In a Powerwall system, you don't need any of that stuff. The AC micro-grid is already running off the Powerwalls and the Powerwall Gateway can communicate over the internet to the vehicle. It probably doesn't require any local communication because it's not safety critical. The truck is synchronizing to the PW AC waveform and they can negotiate through the cloud how much the truck is going to output.