Charger shows E401; app may indicate 'Authentication failed – RFID card not recognized' (for RFID-enabled models).

Note: This affects access control, not electrical safety.

• Use a known-good card: Test with an RFID card or fob that is confirmed registered in the Enphase system.
• Check reader area: Remove any metal stickers, covers, or objects placed over the RFID reader zone.
• Re-enroll cards: Using the app or management portal, delete and re-add the RFID cards.
• Power cycle: Turn OFF the breaker for 1 minute, then ON, to reset the reader module.
• If still failing: The RFID reader module or communication with the control board may be defective and require replacement.