Solar and batteries I get, but that's actually quite independent of electric cars.
A lot of people will be just peachy with the 1500W of Level 1!
Understanding that, yes most people would be in trouble if they got into their Tesla on Monday morning and it had.... 50 miles of range.
And you don't need to keep your gas tank at full because you can fill it up anywhere and everywhere at anytime in 5 minutes.
Technology Connections (of dishwasher fame) goes over why you probably need much less:
If you leave your bubble a little you'll learn a lot. And Im only 50 miles east of your bubble.
I'm not in that much of a bubble. I'm currently working at a company that makes 60-120kW DC fast chargers. I've talked to many people who actually own EVs. I get that the "home backup" use case is a bonus, but it's not a key selling point and it costs more. Also, the utilities want to use your car for "grid support" by making it bi-directional which is different than using your car as a backup when the power goes out. For backup you need the ability to disconnect the house from the grid while powering it from the car, and that's additional cost that people will balk at.