Thermal Imaging for Solar Panels Explained
What a FLIR thermal inspection of your solar system actually shows — and why it should be free with every cleaning.
A FLIR thermal camera reveals hot spots, micro-cracks, dead cells, and failing optimizers — none of which you can see by eye. It's the single best diagnostic tool for residential solar.
What heat signatures reveal
Every solar cell that's working correctly runs at roughly the same temperature as its neighbors. A cell that's bypassed, cracked, or shaded shows up 15–40°F hotter on a thermal image. Patterns of heat reveal exactly what's failing: a single hot cell is a crack, a hot column is a failing bypass diode, a hot module is a dead optimizer.
What we actually find on most arrays
On about 1 in 8 scans we run in San Diego County, we find at least one hot spot worth flagging. About half of those are still inside the manufacturer warranty window — which means the homeowner gets a panel replaced free if they file the claim. That's a $400–$1,200 save that they would have missed entirely without the scan.
Why this should be free with every cleaning
Adding a thermal scan to a cleaning visit takes 10 minutes. We include it free on every biannual or quarterly plan because catching failures early protects the homeowner — and a panel that's running hot enough to be a fire risk is a problem worth catching before it becomes one.