Is energy storage also unprofitable for electric cars? Costs of wallbox + storage

Maybe just have two (or the required vehicle+1) electric cars and switch when one is empty?

The consideration is quite simple: You charge the car battery with 100% electricity, and due to charging losses and conversion losses, about 88% arrives. Now you come up with the idea that the electricity is needed for the house. So the same game happens again with withdrawal losses. Now the car is empty, but you need it fully charged for work, and bam, charging and conversion losses again.

And the battery in the car is not free. It's like saying the heat generated by your car heater is free. If you've ever seen how quickly the oven, stove, dishwasher, and hot water consume 10 kWh, you'll quickly abandon the idea.

Therefore, this bidirectional charging is just marketing blah blah. Sure, it works, but it doesn't really make sense.

So my kWh price was 900€ including labor without subsidy. With subsidy, it's a zero-sum game, which is completely sufficient.

If you can charge for free because there is currently a surplus on the grid and then use the electricity when it costs 50 cents instead of 25 cents as it does now, then the charging losses don't matter.
Of course, it must be intelligently controlled so that when you want to start with the car, there is definitely enough electricity ready in the battery.

So it must be defined in advance what minimum charge must be in the battery and when the full capacity must be available.
However, such things should be controlled externally rather than by the car.

Has anyone ever calculated whether, with the current electric vehicle subsidies, it is not cheaper to permanently install a ZOE instead of a battery?

installing a ZOE permanently instead of a battery?

You mean that plastic ball with four wheels? I prefer to drive a real car where more than one driver can fit in.

So I only paid 11,000 for 36kwh. The car even came free with it best deal of my life. Thanks, Vater Staat. And the car is amazing, but it is also a VW.