Green Energy

It's not just that but that is part of it. If you've ever done electrical load calculations you will find that they can be pretty complex even with a single power source. When you start trying to do capacitance, inductance, or impedance calculations with hundreds of power sources it gets out of hand pretty quickly. That makes what used to be fairly routine design decisions much more difficult to work through.

That's not to mention the additional danger to workers who need to repair damaged transmission lines. If the electric company shuts off a certain section then it should be safe to touch a line in that area right? Not if there's active solar panels in the area.