3 ms·
Driving an down some hills can regenerate 400-500 Wh, at least in my hybrid, so it would take 40 million electric cars to convert 20 MWh in this way. On the to
by stephengillie 8y ago
Driving an down some hills can regenerate 400-500 Wh, at least in my hybrid, so it would take 40 million electric cars to convert 20 MWh in this way.
On the topic of energy density, other solutions - like the house-sized lead-acid battery - have been proposed on the grounds that energy density isn't as important for stationary power stations as other factors, like the vampire effect. Losing 1% of your charge per day is a big issue when storing 20 MWh.
- pjc50 8y agoNot sure about that charge loss question; it depends on how often you're cycling the battery, if it's charged and discharged every day then self-discharge losses may be much smaller than inefficiency losses or the wearout cost on the battery. 1% of 20MWh is 200kWh or about £30 of electricity. The other unclear factor is "C" rate. Is it actually possible to do a full 20MWh cycle in a day?