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. 1

    Verify the battery's actual nominal voltage by checking its nameplate or specifications.

  2. 2

    Check the charger's settings related to supported battery voltages and adjust the voltage range or charging profile if necessary.

  3. 3

    Inspect the TagID data for correct nominal voltage programming and ensure it corresponds to the physical battery.

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Verified technical data. Last updated: March 2026

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