Solar maintenance ·
Your Solar Inverter Might Be Failing Right Now: 7 Warning Signs to Check Today
One unusual reading does not confirm inverter failure. A pattern of fault messages, lower generation, heat, noise or shutdowns gives an electrician more useful evidence to assess the system.
1. The bill has changed without an obvious reason.
A higher electricity bill can prompt a solar check, but it does not identify the inverter as the cause. Tariffs, weather, shading and household use can all change the result. Compare bills with monitoring data and note any change in how the property is being used.
2. Record warning lights and error codes.
A recurring message is more useful than a general description that the inverter is not working. Write down the exact code, indicator colour, time and weather conditions. If the warning returns, do not repeatedly reset the equipment unless the manufacturer's user instructions clearly call for that action.
3. Compare generation over similar conditions.
Monitoring that stays well below the system's recent pattern may justify assessment, particularly when weather and shading are similar. Avoid treating one cloudy day or one app reading as proof of a fault. Save screenshots and note whether all parts of the monitoring system are still reporting.
4. Heat or repeated fan operation has changed.
Inverters can become warm in normal operation. A marked change, repeated heat-related messages, persistent fan noise or shutdowns during hotter periods is useful information to report. Keep ventilation openings clear from a safe distance, but do not touch hot equipment or alter the installation.
5. New sounds, smells or visible damage need attention.
Buzzing, clicking or other sounds that were not present before should be recorded. A burning smell, smoke, sparking, scorching or damaged casing calls for a more urgent response. Keep clear rather than trying to locate the source inside the unit.
6. Repeated daytime shutdowns need assessment.
A shutdown can relate to the inverter, the solar array, the grid connection or another part of the installation. Note the time, displayed message and whether the system restarts by itself. Those details help separate a repeatable pattern from an isolated event.
7. Equipment age and repair history affect the decision.
Age alone does not prove an inverter needs replacement. The model, fault history, parts availability, warranty position, system design and any future solar or battery plans all matter. Keep previous service records and equipment details available so repair and replacement can be assessed on the actual system.
What to prepare for an inverter enquiry.
- Inverter make and model, if it is visible without opening equipment
- The exact warning light, message or error code
- When the issue occurs and whether it clears by itself
- Recent monitoring screenshots or generation figures from similar days
- Any heat, unusual noise, smell or visible damage observed from a safe distance
Observe the system without exposing electrical equipment.
Use the normal display or monitoring app and take photos only from a safely accessible position. Do not open the inverter, switchboard or isolators, remove covers, climb onto the roof or touch damaged equipment.
If there is smoke, fire, sparking or immediate danger, keep clear and call 000.