These may include things like low or uneven charging, excess heat from poor airflow, loose wiring, aging components, shading on panels, or incorrect charge controller settings. To test solar panels, set your multimeter to DC voltage mode and measure open circuit voltage (VOC) at the positive and. Are your solar panels not working properly? Is your inverter giving a warning light on its display? There must be a technical issue with your system while producing and delivering the desired amount of power. Troubleshooting basic issues is something that every homeowner should be aware of. If you. Waking up to discover your solar panels aren't producing power can be frustrating and alarming. Before you panic or immediately call a technician, there are several simple troubleshooting steps you can take to potentially resolve the issue yourself. Checking Voc (voltage open circuit) and Isc (current short circuit) measurements can help diagnose panel issues. Soiling is the #1 culprit: Dirt.
