Don’t forget the massive amount of heat those brakes generate while going down hill and the energy needed to power the air brakes.
And it is still a surplus amount of battery left after going back up.
Don’t forget the massive amount of heat those brakes generate while going down hill ...
Maybe not?
The idea with regenerative braking is to seldom use the friction brakes. The wheels are turning a generator converting most of the mechanical energy to charge the battery.
Typically the friction brakes only activate at low speeds and panic stops.