Solar · Error codes · Shenzhen SOFARSOLAR Co., Ltd.
ID56Shenzhen SOFARSOLAR Co., Ltd. · SOFAR HYD 3000-6000-ES
ID56 on a Shenzhen SOFARSOLAR Co., Ltd. SOFAR HYD 3000-6000-ES: The insulation resistance is too low
Short answer
On a Shenzhen SOFARSOLAR Co., Ltd. inverter, ID56 means: The insulation resistance is too low. 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: The insulation resistance is too low.
Part involved: PvIsoFault.
Likely causes:
- Check insulation resistance between PV array and earth; rectify any short circuit.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: unknown.
Manual reset: See checks.
What you can check
- Read the ID code and name on the inverter LCD (Event List) or in the SOFAR/SolarMAN app and note it for your installer.
- Do not touch panels, DC cables or the inverter; contact installer.
What the engineer will check
- Insulation resistance test per string; repair damaged cables/connectors.
Who to ask for: Sofar-trained PV/battery installer.
Certification: Qualified electrician (BS 7671; MCS-certified PV installer for work on the PV array/DC side).
What you might notice
Sources
- SOFAR HYD 3K~6K-ES User manual (Energy storage integrated inverter HYD 3000/3600/4000/4600/5000/6000-ES) ↗ · SOFAR HYD 3K~6K-ES User manual (midsummer.ie copy, undated) · page 42 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026