Certification just isn't a business prerequisite for EnergySage installers, nevertheless it's highly recommended. In case the installer begun working inside the solar industry ahead of NABCEP was fashioned in 2002 and it has a long (and beneficial) track record, we should let them to hitch our Market. Details provided on https://www.americanarraysolar.com/4-things-to-see-when-hiring-solar-installers-in-california-in-a-budget/