Electric cars

AndyCr15 said:
No, I meant from my pedalling. If it skims 50W off me while I'm pedalling downhill (or possibly even on flats) that would be fine.
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Trust me, it wouldn’t. 50w is pretty significant for normal people. A very fit cyclist (you know the Lycra clad kind who ride everywhere daily) can only sustain 250w for about 20 mins and they would be a complete sweaty exhausted mess when they got off. The older you are the lower the number gets too. A normal person riding around town might be doing 100w.

let’s take 60w to keep the math simple.

Say you recharge the battery on a decent at 60w for 1 min. You would theoretically generate 1wh of stored energy. But you need to deduct drivetrain and charging losses, say 30%. You are down to 0.7wh.

A very typical 48V 12.5ah ebike battery is about 600wh. So you have recouped 0.116% of its capacity.
 
I take your point, I forget my FTP is a lot higher than just your regular person.

Having said that, my point wasn't around if it was possible, but that it was more believable than a self regenerating car...
 
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