GoodWe Inverter Error Code 15 / 15ETU
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GoodWe error 15 / 15ETU: PV overvoltage
GoodWe inverter alarm 15 or 15ETU usually means the PV string voltage exceeds the maximum DC input voltage of the inverter, or is too close to the limit. This can occur if too many panels are connected in series, the array is incorrectly designed, or the temperature coefficient of the PV modules causes voltage rise above safe limits.
When this happens, the inverter may pause operation or trigger protection to prevent damage. Occasional alarms may indicate temporary conditions, but repeated occurrences should be assessed promptly.
Contact e-Solar for safe PV string inspection
Power off the inverter before inspection (turn off the AC output and DC input switches) and follow the safety label instructions. After powering on, e-Solar can measure the DC voltage, verify PV string configuration, check open-circuit voltages, and ensure the total PV string voltage is within the inverter’s safe operating range.
Contact e-Solar and let us know:
- The exact error code on the screen or app
- When the code appears
- Whether your solar production has dropped
- Your inverter model, if you know it
Our Perth-based solar technicians can determine if the overvoltage is due to series configuration, environmental factors, or inverter settings, and advise on the safest corrective action.
Get In Touch Today
Not sure what the error code means? Send us a quick message with a photo of your inverter screen. We’ll help identify the issue and guide you towards the safest next step.
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GoodWe Inverter Repairs and Fault Support
We understand that every solar system is different, which is why our repair and fault-finding services cover a wide range of GoodWe inverter models. If your inverter is showing error code 15, our experienced technicians can help determine whether the issue is linked to grid voltage, inverter settings, site wiring or wider network conditions.
With over 22 years supporting Perth solar systems, e-Solar has seen all kinds of inverter faults and performance issues. We’ll assess your system safely, explain what the code means, and recommend the right next step to help get your solar running properly again.
Trust e-Solar for reliable GoodWe inverter support backed by local experience, honest advice and long-term solar care.