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4-1myenergi · eddi solar immersion diverter

4-1 on a myenergi eddi solar immersion diverter: Output Overload - heater load above 16 A

Short answer

On a myenergi inverter, 4-1 means: Output Overload - heater load above 16 A. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.

Reviewed 24 September 2026 · 1 source

What it means

The manual says: Output Overload - heater load above 16 A.

Likely causes:

  • Connected heater(s) exceed 3.7 kW per output.

Is it safe?

Does the inverter stop?Yes
SeverityFault — needs a manual reset once the cause is fixed
Engineer needed?Yes

The inverter stops until the fault clears or is reset.

Resetting itself: restart after load corrected.

Manual reset: Reboot device from menu or via supply breaker.

What you can check

  • Read the fault on the eddi screen. Check the eddi supply breaker is ON. Report to your installer.

What the engineer will check

  • Check heater ratings; measure current; redistribute loads.

Who to ask for: Electrician / plumber-electrician for immersion circuits.

Certification: Competent electrician (BS 7671); immersion heater work to Part P.

What you might notice

Sources

A code explains what the controller detected, not a confirmed root cause.

Reviewed: 24 September 2026