0205*
Grid frequency change not permitted or synchronization impossible
SMA · SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter
What does 0205* mean?
The inverter has detected an impermissible change in grid frequency or is unable to synchronize with the grid. This can prevent the inverter from feeding power into the utility grid. The inverter will shut down and monitor the grid for 30 seconds before attempting to reconnect.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the grid frequency using a frequency meter or power quality analyzer.
- 2
Verify the stability of the utility grid's frequency.
- 3
Check grid connections for any issues that could affect synchronization.
Verified technical data. Last updated: March 2026
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Source: SMA SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter