2037
Grid Underfrequency
Huawei · SUN2000 Solar Inverter
What does 2037 mean?
The actual power grid frequency is lower than the standard requirement for the local power grid. This condition indicates an unstable grid frequency, which can cause the inverter to disconnect for protection.
Common Causes
- Power grid exception: The actual power grid frequency is lower than the standard requirement for the local power grid.
- The power grid may be abnormal temporarily.
- The grid underfrequency protection threshold is set incorrectly.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check whether the grid frequency is within the acceptable range.
- 2
Log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold with the consent of the local power operator.
Verified technical data. Last updated: March 2026
Related Faults
Source: Huawei SUN2000 Solar Inverter