ID003 on a Shenzhen SOFARSOLAR Co., Ltd. SOFAR HYD 3000-6000-EP: The grid frequency is too high
Short answer
On a Shenzhen SOFARSOLAR Co., Ltd. inverter, ID003 means: The grid frequency is too high. 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 grid frequency is too high.
Part involved: Grid overfreq.
Likely causes:
- If occasional, grid abnormal temporarily; inverter returns to normal automatically. If frequent, check grid voltage/frequency within range and AC breaker/wiring; if out of range and wiring correct, contact Sofar support to change protection points after DNO approval.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: yes.
Manual reset: Automatic when condition clears.
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.
- If occasional, no action.
- Check the AC breaker is on; if frequent tell your installer.
What the engineer will check
- Grid V/f measurement; AC wiring; DNO approval before protection changes.
Who to ask for: Sofar-trained PV/battery installer.
Certification: Installer liaison with the DNO; any change to grid-protection settings needs DNO agreement (G98/G99) and the manufacturer's installer/grid code.
What you might notice
Sources
- HYD 3000/5000/6000-EP User Manual ↗ · sofarsolar.com upload 2024-12-27 · page 81 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026