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
Verify any security, authentication, or login parameters configured in both the charger and the battery's BMS systems.
- 2
Ensure that compatible firmware versions are running on both the charger and the battery, particularly concerning communication protocols.
- 3
Consult the respective manuals for specific login procedures, security configurations, or protocols required for communication.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Perfect Charging