It doesn't make sense to power any vehicle with onboard solar. There are no electric RVs yet because the batteries required to have any amount of range are cost prohibitive and heavy.
I put 1800W on my RV and that's covering the roof end to end. I'd guess it'd be enough for something like 1-2 miles a day on an electric drive train, assuming you don't use power for anything else.
> I'd guess it'd be enough for something like 1-2 miles a day on an electric drive train
It's probably more 10~20, possibly as much as 30, if it's a long and sunny summer day FWIW.
For references:
- the F150 lightning gets close to 2 miles / kWh on average, ~1.5 at highway speeds but as much as 3~4 at consistent low speeds
- on the other side of an RV, Volvo markets their FH Electric (cabover semi) for 1.1kWh/km — 0.7 mi/kWh — at 80km/h (50mph), DAF/Innovate UK's Battery Electric Truck Trial yielded similar results (1.08kWh/km over 287000 km), it's also close to the numbers of the electric trucker in their very recent MAN eGTX video (0.83 kWh/km = 0.75 mi/kWh)