Not really. You can remotely tell if a system is broken based on the power it producing, and you usually clean the panels at least every few years. So any crack

Not really. You can remotely tell if a system is broken based on the power it producing, and you usually clean the panels at least every few years. So any cracks would be discovered relatively quickly, but they are pretty rare anyway. The glass they use to protect the panels is super strong, and designed to withstand large hail. The only time I've seen broken panels is when someone hits a baseball into one. However, drone imagery is heavily used in the solar industry for roof inspection. For rooftop solar, you need to inspect the roof to make sure the panels will fit and won't be obstructed. Google maps can give you a ballpark, but closer imagery is needed. There's a few companies doing this (Solar Census, Google Sunroof, Sun Number, etc.), so might check them out. FYI, the coolest cleantech application I've see for areal imagery is Ceres Imaging, who flies over crops to detect where you need to water. Something like a 50%+ water savings because you can target water to where it's needed. Crazy effective.