 The solar is kind of hard to beat because you can just cut a hole up there in the roof and tuck the flashing underneath the shingles and put it down and screw it down and do a little sealant around the top half edge of it and you're done. And they run. And the electric ones, though, you have to have an outlet for them to plug in inside the attic. You have to have a light up there. You have to run a switch light down and put a switch on.