ID09 on a Shenzhen SOFARSOLAR Co., Ltd. SOFAR HYD 3000-6000-ES: LLCBus voltage too high (hardware protection); ID09-ID12 internal faults
Short answer
On a Shenzhen SOFARSOLAR Co., Ltd. inverter, ID09 means: LLCBus voltage too high (hardware protection); ID09-ID12 internal faults. 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: LLCBus voltage too high (hardware protection); ID09-ID12 internal faults.
Part involved: HW_LLCBus_OVP.
Likely causes:
- Switch off, wait 5 minutes, switch on; if not solved contact Sofar technical support.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: Restart: switch off, wait 5 min, switch on.
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.
- Sofar's manual remedy is: switch the inverter OFF, wait 5 minutes, switch ON. Only do this if your installer has shown you the power-down/power-up order in the manual (AC breakers, battery isolator, battery, DC switch); otherwise ask your installer.
What the engineer will check
- Restart; Sofar support. Same remedy for ID10 HW_Boost_OVP, ID11 HwBuckBoostOCP, ID12 HwBatOCP.
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 40 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026