I'm just curious. Every morning, as I exit the freeway on my way to work, I have a downhill exit ramp of about 1/3 a mile and the signal is red 90% of the time, so I must make a full stop. I've often wondered from what speed one would need to slow down/stop to regen enough electricity to accelerate in EV to 25MPH. I know there are variable, but in general, how many watts are regenerated in stopping from 60 MPH? Conversely, how many watts does the car take to accelerate to 25 in EV? THIS IS NOT ABOUT FE!!! I understand the energy losses that occur when transferring energy from one form to another. I'm just curious.
Very roughly, I'd assume about 80% efficiency going each way, so you'd get 80% of the original kinetic energy into the battery, then 64% back to kinetic energy. so (V2/V1)^2 = 0.64 with V1 of 60, you have plenty to get back to 25 on EV, not even counting the downhill part. You'd need to stop from roughly 32MPH to get back to 25. There's wind, drag, and a little loss to friction brakes, so maybe 35-40.
The MFD indicates 150wh regen stopping from 60mph going downhill for me (have to stop for a T-junction). No idea how many wh to get up to 25 though, so not much help for you really...
