AZjeff
$50 Site Donor 2023
Depends on how you drive. If the Rivian towing uphill is what you do, the amount of range they calculated is based on towing a load uphill. Going downhill will not get them all back due to the aerodynamic loss a trailer towing pickup is horrible at.
A prius prime or other EV will likely get back quite a lot if they are aerodynamic and didn't waste too much energy in the heat going uphill.
Forgive me but I don't understand your answer. The 4 miles of range regenerated wasn't calculated, it was taken from the dash display of range at the top of the downhill and at the bottom. I also don't understand what aero loss has to do with going down a long steep grade that needs brakes to maintain speed in any vehicle.
I understand the concept of regenerative braking but maybe not the application I guess. It makes sense to me that that steeper the grade the more energy can be generated to put back in the battery at a given speed but maybe that's not the case? I think they thought the same, a heavy truck with a heavy load going down a steep hill should regenerate lots of electricity. Maybe it actually did.