Very little of what gets called solar panel repair is a panel. The common faults are inverter failures, isolator and connector problems, water ingress at a roof penetration, birds under the array and monitoring that stopped reporting months before anybody looked. The panels themselves are the most reliable part of the installation.
Common solar panel problems: what actually fails
Inverters lead by a distance: they are the working part and they run every day for decades. Then come DC isolators and connectors, particularly where a cheap connector was mated to a different make, which is a known cause of arcing and heat. Then roof penetrations that were never flashed properly and leak years later. Then birds nesting under the array, which damages cables and blocks airflow. Panels fail comparatively rarely, usually from physical damage, a cracked cell or a failed bypass diode that shows up as one string producing less.
How do I know if my solar panels are working? Catching it before it costs a year
Most arrays stop producing quietly. The generation meter or the monitoring portal is the only thing that tells you, which is why access to your own monitoring matters and why an annual look at the year on year figure is worth more than an annual clean. A sudden drop points at an inverter or an isolator; a gradual one points at soiling, shading from a grown tree, or a degraded string. If you have no monitoring at all, the meter reading against the same month last year is a rough but usable check.
Solar repairs near me: who is qualified to work on it
Roof work and live DC are both hazards, and an array is a generator that cannot be switched off by removing a fuse. Work on the electrical side belongs to somebody competent in solar specifically, not simply an electrician, and roof access belongs to somebody equipped for work at height. For anything under warranty, the installer or the manufacturer's approved repairer is the right call, because letting a third party open the equipment can void the cover.
Repair or solar panel replacement?
An inverter that has failed out of warranty is usually replaced rather than repaired, and a like for like modern replacement often produces slightly better and has better monitoring. A single failed panel can normally be replaced individually, though matching an older module exactly is sometimes impossible and a close equivalent is used instead. A whole array replacement only makes sense when the roof is being redone, when the system is very old and small compared with what the roof could carry now, or when a repair cost approaches the value of a new installation.
Questions people ask about solar panel repair
How do I know if my solar panels have stopped working?
Check the inverter display or the monitoring portal, and compare generation against the same month in previous years. A sudden drop to zero usually means an inverter or isolator; a gradual decline suggests soiling, new shading or a degrading string.
Can an ordinary electrician repair solar panels?
Not safely as a rule. An array generates whenever there is light and cannot be isolated like a normal circuit, and roof access is work at height. Use somebody with solar specific competence, and use the original installer or an approved repairer while equipment is under warranty.
Is it worth repairing an old array?
Usually yes if the panels are sound and the fault is the inverter or a connector, because the panels are the expensive, long lived part. A full replacement makes sense mainly when the roof is being redone or the system is very small for the roof.
What if the installer has gone out of business?
The manufacturer warranties on panels and inverter may still stand if they were registered in your name, so check those first. For workmanship there may be protection through the consumer code or quality scheme the firm belonged to.