What does '10 min value grid overvoltage' mean on my Hoymiles HMS-1800 and how to fix it?
- LLaura MendozaJul 29, 2025
If you occasionally see the '10 min value grid overvoltage' alarm on your Hoymiles Inverter, it might be due to a temporary issue with the grid voltage, and the microinverter should automatically recover when the voltage stabilizes. However, if this alarm appears frequently, check to ensure the grid voltage is within the correct range. If it's outside the range, contact your local power operator or, with their approval, adjust the grid overvoltage protection limit using the Hoymiles monitoring system.