Are you sure? Google tells me a Cybertruck uses around 400 Wh of energy per mile. 20 miles worth of charging then would be 8000 Wh. To generate that much in an hour would take an 8000 W generator.
The first 8000 W generator I found [1] is 200 lbs.
Here's a 24000 W generator [2] that weighs 455 lbs. The weight of its fuel (propane) would be a little under 17 lbs for each hour's worth.
Are you sure? Google tells me a Cybertruck uses around 400 Wh of energy per mile. 20 miles worth of charging then would be 8000 Wh. To generate that much in an hour would take an 8000 W generator.
The first 8000 W generator I found [1] is 200 lbs.
Here's a 24000 W generator [2] that weighs 455 lbs. The weight of its fuel (propane) would be a little under 17 lbs for each hour's worth.
[1] https://www.generac.com/residential-products/portable-genera...
[2] https://www.generac.com/globalassets/products/residential/st...
Yes I was exaggerating; the 455lbs 24kW generator would probably be >20mph but not the 8000W one given all the losses.