Sure they can and anyone who is aware of it does. We do it in NYC and I save things like dishwasher and laundry for off-peak times. But things like car charging

Sure they can and anyone who is aware of it does. We do it in NYC and I save things like dishwasher and laundry for off-peak times. But things like car charging are unique because there may be a 12-hour window in which you need to do 4 hours of charging and the timing is very flexible and has diminishing returns if you don't have a lot of miles to cover any time soon.