The workmanship warranty addresses many of the labor your installer performs. It's usually somewhere involving one and 10 years. Certification isn't a agency requirement for EnergySage installers, however it's remarkably recommended. In the event the installer started Operating while in the solar industry just before NABCEP was formed in 2002 https://residential-solar-contrac68012.blogaritma.com/28693815/indicators-on-commercial-solar-installers-you-should-know