You plug in when you get home, and your car doesn’t actually charge until it’s scheduled…sometime later at night. Mine starts at 8pm. During the heatwave I bumped it to 10pm because it doesn’t really matter to me. It’s done charging in about 3 hours.
If you use anything more fancy on the PV side you can also control it on the other side.
And for more than one flat, load control is already available. We're I life we have 90 cars in the parking garage and there is a load controller