Thermal drones find faults that are invisible to the eye — a failing solar cell, a wet patch in a roof, an overheating connector. What to look for, when to fly and which tools to use.
What thermal shows
A thermal camera measures surface temperature. Faults usually show up as spots that are hotter or colder than their surroundings: a damaged solar cell runs hot, trapped water in a flat roof holds heat after sunset, and a loose or corroded connection warms up under load.
Solar farms
Fly when panels are working hard — in strong, steady sunlight — so faulty cells and strings stand out. An automated grid flight with a thermal drone such as the DJI Matrice 4T covers rows quickly, and the zoom camera confirms what each hotspot is without walking the site.
Roofs and buildings
Moisture and insulation problems are easiest to see in the evening, when the roof gives back the heat it stored during the day. Keep a steady distance and angle so readings are comparable across the roof.
Power lines and substations
Hot joints and overloaded components appear when lines carry load. Multi-sensor payloads like the Zenmuse H30T pair thermal with long zoom and a laser rangefinder so inspectors can stay at a safe distance. For long corridors and heavier payloads, the DJI Matrice 400 extends what one flight can cover.
Report and compare
Save thermal images with their temperature data, log the location of every fault and fly the same route at the next inspection — trends tell you more than a single snapshot.
Inspection work often needs permissions and trained pilots. Talk to our team about the right aircraft and payload for your assets.