What this covers
Solar panel installation puts photovoltaic panels on the roof or the ground and connects them to the home's electrical system through an inverter. The installer checks the roof's age, structure, orientation and shade, designs the layout, and confirms the electrical panel can accept the system. Where the local code requires a permit, the installer pulls it and applies to the utility to interconnect. Crews flash each roof attachment, mount the racking and panels, run conduit to the inverter and disconnect, and make the connection. After inspection, the utility gives permission to operate before the system is turned on.
When to call
- A roof with good sun exposure that has years of life left.
- A roof replacement coming up, which is the natural time to plan panels.
- Interest in generating some of the home's electricity on site.
What to expect
- Site checkThe installer reviews the roof, shade, structure and electrical panel.
- Design and permitsA system is designed, permits are pulled and the utility interconnection application is filed.
- InstallAttachments are flashed, racking and panels mounted, and wiring run to the inverter.
- Inspect and connectThe system is inspected and turned on after the utility grants permission to operate.
Get a certified company
Look up a certified company by ZIP code. Every company's license, insurance and trades are verified before it is listed, and placement is never paid.
Questions people ask
Should the roof be replaced first?
If the roof is near the end of its life, replacing it first avoids removing and reinstalling the panels later. The installer and roofer can coordinate the timing.
What is interconnection?
The utility's process for approving a system that connects to its grid. It usually includes an application, a review and a final permission to operate after inspection.
Do panels work during a power outage?
Most grid-tied systems shut down automatically during an outage so they do not send power onto the lines. Keeping power on during an outage requires a battery or other backup equipment designed for it.
Related: Home battery installation · Electrical panel upgrades · Roof replacement · All insulation and energy
This page describes what the service involves. The company you hire sets the scope, the schedule and the price, and your contract is with that company. We verify credentials and collect reviews from real jobs. We do not guarantee any company's workmanship. Safety steps are general guidance. When in doubt, leave the home and call 911.