58

Login Failed (CAN)

Fronius · Perfect Charging

What does 58 mean?

The battery charger failed to successfully log in or establish a secure handshake with the battery via CAN communication. This can be due to authentication issues, protocol mismatches, or security settings preventing communication.

Common Causes

  • Incorrect authentication keys, passwords, or parameters exchanged between the charger and the battery's BMS.
  • A mismatch in communication protocols, software versions, or security settings that prevents successful negotiation.
  • Security settings or access controls on either device are preventing the establishment of the communication link.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify any security, authentication, or login parameters configured in both the charger and the battery's BMS systems.

  2. 2

    Ensure that compatible firmware versions are running on both the charger and the battery, particularly concerning communication protocols.

  3. 3

    Consult the respective manuals for specific login procedures, security configurations, or protocols required for communication.

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Verified technical data. Last updated: March 2026

Related Faults

Fronius Error 58: Login Failed (CAN) — Troubleshooting Guide | ErrorLib