The electric car is useful because in the event of a power outage, a decent one will have a 60KWH+ battery. Assuming it's even partially charged, that's enough

The electric car is useful because in the event of a power outage, a decent one will have a 60KWH+ battery. Assuming it's even partially charged, that's enough energy to power personal electronics for weeks. You could probably even power a fridge, TV, and some basic household equipment for a week if you had a decent inverter. On the other note, if you get grid tied solar you can use them if the power is down, but you need to buy an SMA inverter with secure power supply. The inverter will give you an outlet that will work if the grid is down, even without a battery system.