Good one!
We're thinking of putting
solar on our little shop. It's still at the 'twinkle in the eye' stage. Although we don't have a good aspect - the rear roof faces SW ish and we don't get much sun on that side in the winter, the daylight in summer (when the electric loads from the refrigerators and freezers are highest) is pretty long, so we ought to be able to make a bit of a dent in the mains electric bill at that time of year.
Have you got solar-electric on your place at the moment? Can you have too much?!