Hager EV charger shows E03 and will not energise; charging stops shortly after starting. Often logged as ‘overcurrent’ or ‘overload’ in the app.

Safety first: Overcurrent can overheat wiring. If you smell burning or see discoloration, switch off power at the main breaker and call a professional immediately.

Steps to try:

• Check charger rating vs. vehicle setting: Confirm the Hager charger’s maximum current (e.g. 7.4 kW / 32 A single‑phase). In the vehicle’s charging settings, ensure the requested current does not exceed this rating.
• Power-cycle the charger: Turn OFF the EV charger’s dedicated breaker for 1 minute, then turn it back ON. Attempt a new charging session.
• Inspect upstream protection: Check that the dedicated MCB/RCBO feeding the charger matches the charger’s rated current and has not been derated by overheating or loose terminals.
• Check for repeated trips: If E03 appears repeatedly even at low current, an internal contactor or current sensor may be defective. Do not open the unit unless qualified.
• Call a technician: A Hager‑trained electrician should open the charger, inspect the power contactor, torque‑check terminals, and verify current sensor calibration. Replace the power contactor or main control board if faulty.