[Richard]

Since you asked. I think my coach uses around 180 hp cruising at 70 mph. That's around 135 kW. I think a Tesla has about an 85 KwHr battery pack. So if you used two Tesla battery packs you could cruise for about an hour.

I am thinking of a hybrid RV not necessarily one that has to be plugged in at the end of every trip.

I could be remembering the cruising Hp all wrong, it's been years since I had it on the Silverleaf screen. I have slept since then.

But think about it. A 180 hp diesel is around the size of the one in the Sprinter vans. The battery pack would come in handy for going up hills. You would get some power from regenerative braking, but not enough to be significant.

This is not out of our current technology window. Cost effectiveness could be the most serious barrier.

You wouldn't need the weight of the current genset, but would have one much smaller diesel engine used in a hybrid configuration

My math can't be right, but I don't know what I'm goofing up.

So, taking some of Elon's claims of 400 mi range, around 6 hrs drive time, of 6 X 135 = 800 KwH battery pack or ten times what Tesla is currently putting in cars. I can't make any math work that says that truck can be recharged in 30 mins at anything other than a nuke power plant.