Even the best solar systems can develop faults over time. From inverter errors to wiring wear, these issues can reduce performance or stop your system completely. Knowing the most common faults helps you spot problems early and avoid costly repairs.
At Williams Electrical & Air, we diagnose and repair all types of solar faults across Melbourne, Geelong, and Ballarat — getting your solar back to full strength fast.
1. Inverter Faults
Your inverter is the “brain” of your solar system. If it fails, power stops flowing. Common signs include flashing lights or error codes. Faults can result from:
- Overheating
- Internal component wear
- Incorrect installation
- Moisture exposure
Our fix: We inspect and test your inverter, reset the system, and replace faulty parts where needed to restore proper function.
2. Wiring & Connection Issues
Loose or corroded connections can cause power loss, arcing, or even fire risks. These faults are often hidden until performance drops or tripping occurs.
Our fix: We test voltage, tighten all terminals, and replace damaged cables using weather-rated materials for long-term safety.
3. Panel Damage
Hail, debris, or birds can crack panels — reducing output and creating water ingress risks.
Our fix: We safely isolate the array, replace damaged modules, and reseal mounting areas to prevent further damage.
4. Isolator Switch Failures
Water or UV exposure can cause isolator switches to fail over time. This is one of the most common safety issues seen in older systems.
Our fix: We replace worn isolators with fully compliant, weatherproof models that meet Australian standards.