Charger displays E20; app may show ‘time sync error’ or ‘NTP/clock fault’.

Note: This mainly affects scheduled charging and billing accuracy; basic charging may still work.

• Step 1 – Restore internet: Ensure the charger has a working internet connection via Wi‑Fi or Ethernet.
• Step 2 – Reboot: Power cycle the charger to force a new time synchronization attempt.
• Step 3 – Check router time: Make sure your router or local NTP source has the correct time.
• Step 4 – Disable schedules temporarily: Turn off scheduled charging in the app and test immediate charging.
• Step 5 – If E20 persists with good connectivity: The internal RTC or its backup battery on the control PCB may be failing and require board replacement.