Or you can by a car instead. An MG4 costs less than 20000 euros with a 51kWh LFP battery. In addition to a good battery, it's a great car as well.
afaik it doesn't support bidirectional charging, I'd much rather cycle my standalone lifepo4 bank than my EV battery
In germany was (still is) illegal to use the car as battery… it is going to change soon though
afaik it doesn't support bidirectional charging, I'd much rather cycle my standalone lifepo4 bank than my EV battery