Futurology

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submitted 3 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 6 points 3 weeks ago (1 children)

So if you can charge them with "free" (that would be spoiled otherwise) energy, at say 0.20€/kWh it'd take 575 charges to pay back.

I wonder how many cycles they hold...

[–] [email protected] 3 points 3 weeks ago

Depends on the depth of discharge, but several thousand. You do need to account for round trip efficiency.