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IE023Tigo Energy · Tigo EI Inverter (EU)

IE023 on a Tigo Energy Tigo EI Inverter: Charger Relay Fault (Charge Relay Fault). Tigo suggestion: Press ESC to restart

Short answer

On a Tigo Energy inverter, IE023 means: Charger Relay Fault (Charge Relay Fault). Tigo suggestion: Press ESC to restart. 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: Charger Relay Fault (Charge Relay Fault). Tigo suggestion: Press ESC to restart.

Likely causes:

  • Charge Relay Fault.

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: unknown.

Manual reset: ESC key restart where stated.

What you can check

  • Read the code on the inverter display / EI app.
  • Consult your installer (Tigo: only qualified people should perform the listed actions).

What the engineer will check

  • Press ESC to restart.
  • Escalate to Tigo Support if persists.

Who to ask for: PV / hybrid inverter.

Certification: MCS PV installer; Tigo-trained installer; electrical work to BS 7671.

What you might notice

Sources

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

Reviewed: 24 September 2026