“If you keep a zero balance on your credit cards there is NO downside.
And if you use cash for everything you will never have a good credit rating. That can mean very real $$$ when you try to finance a car or a mortgage. “
It’s also about the same power as a central air conditioner. If people get home, plug their car in, and start to cool their house...and a lot of people do it, you better believe that a utility will notice. A typical house averages 1000 Watts without AC...then it operates at 6000 Watts with AC on, and now we add another 5000 Watts, to get that house up to 11 kW (after work). That is some serious power if lots of people buy the cars, a lot of areas won’t stand a chance. The utilities are able to predict very closely as to what their load will be - start doubling it all over the place, and they will be hit.
Most people now have programmable thermostats and the AC shuts down after midnight or so. Likewise, a charger can be programmed to come on in the middle of the night rather than immediately when plugged in, so there is no time both appliances are on at once. At your 5000 watt rate, it would only need to charge for two hours to replenish the charge to drive 40 miles.