Charger shows E205; app may indicate 'Firmware update failed' or 'Firmware corruption detected'.

Warning: Do not repeatedly power cycle during firmware updates unless instructed; this can worsen corruption.

• Stable power: Ensure the charger circuit breaker remains ON and that there are no ongoing power outages.
• Retry update: Using the Enphase app, check for available firmware and attempt the update again, following on-screen instructions.
• Network stability: Make sure Wi-Fi or Ethernet is stable during the update. Avoid heavy network usage that could interrupt the download.
• Factory reset (if supported): Follow the user manual to perform a safe factory reset of the charger configuration, then reconnect it to the app and retry the update.
• If E205 persists: The internal flash memory or control board may be damaged. A technician may need to reflash firmware via service tools or replace the control board.