My car charger turns on and adjusts the charging amp based on how much solar energy I'm getting from the sun. I know this will eventually be replaced by some 3rd party solution, but when I did it there were none.
I wouldn’t be shocked if third party solutions become mandatory for this use case in the near future, similar to how smart thermostats controlled by the utility company are a thing already. I know some areas have incentive programs to have utility controlled car charging plugs already as well.