first commercially available all electric RV

Slownsy wrote:
so are you saying that Americans park there vehicles with solar in the shade

The ones with portable solar panels do.

The panels go wherever the sunlight is, and the RV stays in the shade.

Shade greatly reduces heat buildup inside the RV - which in turn reduces the amount of power required to keep it comfortable.

In that regard, roof-mounted panels tend to be counterproductive: The power they produce by parking the RV in full sunlight is offset by the extra power required to keep the RV cool...due to the extra heat buildup from parking in full sunlight.