How Long Does It Take to Install Solar Panels? “A project manager confirms your roof measurements and solar production. We will need access to your electrical panel and attic space (if you are installing on your roof)” — Site Assessment (1-2 Weeks) “Our engineering team generates your final design and electrical drawings for submission to the town and utility. We will ask you to approve your design before we submit anything. ” — Engineering and Design (4-5 Weeks) “We apply for permits and interconnection with your town and utility, respectively. ” — Permits and Interconnection (4-6 Weeks) “Our installation team installs and hard-wires your solar system. ” — Installation (1-2 Days) “Our team schedules an inspection with your town’s building department to ensure quality and safety of your installation. ” — Inspection (1-2 Weeks) “Your utility will visit your home and install a net meter. They will then email you with permission to energize your system. ” — System Activation (4-6 Weeks) “Your project manager will walk you through your system and answer any additional questions you may have” — Final Walkthrough (1-2 Weeks)