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Haley McdonaldAug 23, 2025
What to do about grid undervoltage on Huawei Controller?
- TTravis WestAug 23, 2025
A grid undervoltage alarm on the Huawei Controller means the grid voltage is below the lower threshold. Here's what you can do: 1. If the alarm is occasional, it might be a temporary grid issue, and the SUN2000 should recover automatically. 2. If the alarm persists, check if the grid voltage is within the acceptable range. If not, contact your local power operator. If it is, you can modify the grid undervoltage protection threshold (with the power operator's consent) using the mobile app, SmartLogger, or NMS. 3. If the alarm continues, inspect the connection between the AC circuit breaker and the output power cable.