@chrisjrn that works. I use the "solar charge only' mode through Emporia for general charging and I put a bypass button in Home Assistant if we want to pay to charge. I'd like to be able to show how much charge is on the car.

@Myphatself For what it's worth, my polestar reports the drivetrain battery charge over the OBD port, so you could likely get that to transmit with something like https://www.home-assistant.io/integrations/torque/