Certification is just not a company requirement for EnergySage installers, but it really's highly suggested. In case the installer started out Doing the job during the solar business ahead of NABCEP was shaped in 2002 and has an extended (and constructive) history, we should still make it possible for them https://www.tumblr.com/californiasolarinstallation/761498651179794432/why-buy-maintenance-services-from-solar-companies