Yes, absolutely. That’s what we’ve all been waiting for!
Have you checked out the all-electric motorhome concept that Dethleffs showed at Dusseldorf in 2017? The engine is electric, but the solar cells don’t charge the engine’s batteries — not enough power yet. Even still, they produce 3000 KW, so enough to completely power the camper. The camper itself contains many of the technologies discussed in this thread, including far-infrared panel heating, the kind used on French TGV trains. Some motorhome manufacturers are really beginning to “think through” what would be required to create a completely autonomous, all-electric motorhome.