Inverter overvoltage errors occur when the DC input voltage from your solar panels exceeds the inverter’s maximum voltage rating. While your system may still operate temporarily, this can damage the inverter or cause it to shut down as a protective measure.
Common Causes
- Too many panels in series – Connecting too many solar panels in a single string increases the voltage beyond what your inverter can safely handle.
- Cold temperatures – Solar panels produce higher voltage in cold weather. If your array is near the upper voltage limit, low temperatures can push it past the safe range.
- Incorrect system design – Wiring mistakes or incompatible components can result in unexpected voltage spikes.
How to Prevent Overvoltage Errors
- Check your inverter's maximum DC input voltage and ensure your solar array is designed within that limit—even during cold weather conditions.
- Use design tools or consult a professional to calculate voltage based on panel specs and local temperature extremes.
- Avoid over-sizing your panel strings beyond what the inverter’s voltage input range supports.
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