When it's the prototype of a vehicle feature, scalability is expected.

Of course, this was just for show, as a distraction from other nasty things that were being done behind the curtains, but it's the principle. Don't show it unless you mean it.

Assuming the same number of panels, if you use X amount of solar power to do Y, then X amount of solar power isn't available for something else and it has to use non-solar. The only thing that increases solar is adding more panels, rather than nitpicking which thing used the solar and which didn't.

The use of energy generally is non-green as long as non-green is a major part of the energy market. Ascribing some end uses of energy as green or non-green is silly and wrong. It is only the production end that can be green or non-green. On the use end all energy is equal.