Optimizers Are Offline Occasionally, But Their Total Energy Yields Are Updating - Huawei SUN2000-450W Series Troubleshooting Manual

SUN2000-450W and SUN2000-600W-P Series
Troubleshooting Guide
After the extension cables are replaced onsite, PV2 can connect to the power grid properly
(the forward impedance is 15.5 kΩ and the backward impedance is 14.35 kΩ).
3.4.2 Optimizers Are Offline Occasionally, but Their Total Energy
Yields Are Updating
Symptom: Certain optimizers are offline, but their total energy yields are updating.
Before an optimizer goes offline (energy yield: 225.965 kWh):
After the optimizer goes offline:
After a certain period of time, the optimizer recovers to operating status (the energy yield is
updated to 226.026 kWh):
Cause: The optimizers are shut down due to heartbeat issues.
Solution:
1.
Issue 01 (2024-1-2)
When the irradiance is good, upgrade the optimizer MBUS to SPC330 or later.
Upgrade on the local app:
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