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.