201
TagID Nominal Voltage Not Supported
Fronius · Perfect Charging
What does 201 mean?
The nominal voltage of the battery, as read from its TagID module, is not supported by the battery charger, or a specific charger setting prevents its use. This means the charger cannot safely or effectively charge the battery due to voltage mismatch.
Common Causes
- The battery's nominal voltage, as reported by TagID, falls outside the charger's specified operating voltage range.
- A specific charger parameter or charging profile setting is preventing the charging of the detected battery voltage.
- Erroneous or corrupted nominal voltage data within the battery's TagID module.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify the battery's actual nominal voltage by checking its nameplate or specifications.
- 2
Check the charger's settings related to supported battery voltages and adjust the voltage range or charging profile if necessary.
- 3
Inspect the TagID data for correct nominal voltage programming and ensure it corresponds to the physical battery.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Perfect Charging