The size of batteries in cars is huge too. I was looking at a home battery, and the tesla powerwall is one of the better ones for a relatively high power outpu

The size of batteries in cars is huge too. I was looking at a home battery, and the tesla powerwall is one of the better ones for a relatively high power output (assuming you can get one somewhere). That's around £10k+ for 13.5kWh, while a volkswagen ID3 has a 58kWh battery and costs £33k. That's less per kWh, and it's also a brand new car. It'd power my entire house for days, and is capable of charging drastically faster (so my home power supply would easily be the limiting factor) and I assume capable of discharging faster too (?).