For the fun of it I did do the calculation. Berlin uses about 12TWh per year. That’s about 33GWh per day.
Assuming an energy density of 450Wh/l (a number car batteries apparently were able to reach 2020) that’s about 80.000 m³.
A soccer field is about 4000 m². So a space of 10 soccer fields with 20m high battery stacks would do that.
Now assume that energy density will have improved in the last 4,5 years and that maybe storage batteries can be different from batteries in cars and that can go down by a lot. Seems reasonable enough for the biggest city in Germany.
For the fun of it I did do the calculation. Berlin uses about 12TWh per year. That’s about 33GWh per day.
Assuming an energy density of 450Wh/l (a number car batteries apparently were able to reach 2020) that’s about 80.000 m³.
A soccer field is about 4000 m². So a space of 10 soccer fields with 20m high battery stacks would do that.
Now assume that energy density will have improved in the last 4,5 years and that maybe storage batteries can be different from batteries in cars and that can go down by a lot. Seems reasonable enough for the biggest city in Germany.