They pull grid. It’s NOT a logical thing.
Home battery systems that actually *do* something are double that capacity - 15kwh and that can barely sustain a 2 person household overnight.
You still miss the entire point though.
If the car is at WORK in the car park - it is NOT in the home driveway charging in the sunlight. It gets back there too late.
People who should not really be using a car to get to work may get away with it... I would have been stranded on the side of the road by 7:35am
These concepts (currently) work in high density low utilisation scenarios and nothing more. In these scenarios - Scooters are more sensible.

