Submitted by witjweri on February 11, 2019
If you turn the power to the UMC ( portable EVSE) off and then on, the car will start to charge again. If you do the same thing with the wall charger, the car will not restart charging until you have unplugged the car and plugged back in. Why the difference?
If you go away on holidays, leaving the car plugged into the wall charger and there is a short power outage ( storm damage etc) then charging will not resume. If you are plugged into the UMC, then charging will resume after the power failure. It will make a big difference when you get home!
The reason I am interested is actually a bit different. I have a solar charging facility for the car. There is nothing available on the market for a solar inverter to communicate with the wall charger or the car. I control the charging by switching the power to the UMC off and on using a standard signal from the solar inverter based on the state of charge of the solar battery. Simple stuff, but it won't work on a wall charger. Why not?
Why can't we get a car charger to communicate with a standard solar BMS (battery management system) and control the car charging?