Certification isn't really a organization prerequisite for EnergySage installers, nonetheless it's highly encouraged. Should the installer started off working from the solar business right before NABCEP was fashioned in 2002 and has a protracted (and optimistic) reputation, we should permit them to hitch our Market. The standard cost per watt https://www.diigo.com/item/note/asc9s/ei4h?k=5f5e3872140be0a8a895d98b9647b5f0