Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)
Alarm 2014High String Voltage to Ground
Name in the manufacturer's documentation (fault list): High String Voltage to Ground
[1]
In plain words (editorial)
The PV string voltage to ground is abnormal, which may cause power degradation. The manual's checks concern the PID protection function and any PID compensation device.
When to call a service technician: If the alarm occurs repeatedly, contact your installer or Huawei technical support.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
- The string-to-ground voltage is abnormal, which may cause power degradation risks.[2]
Steps given by the manufacturer (source text)
- If no pid compensation device is deployed in the system, disable the pid protection function. note: if the pid protection function is disabled but the nighttime reactive power compensation is enabled, pv module degradation may occur.[3]
- If there is a pid compensation device in the system, check whether it is faulty. if yes, rectify the fault.[4]
- Check whether the device and pid compensation device have consistent compensation direction settings. if not, adjust the settings based on the pv module model. (note: if the pv– is set to positive offset, the voltage between the pv– of the device and the ground should be greater than 0 v to clear the alarm; if the pv+ is set to negative offset, the voltage between the pv+ of the device and the ground should be less than 0 v to clear the alarm.)[5]
- If the alarm occurs repeatedly, contact your dealer or technical support.[6]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →
Sources
Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.
- [1] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
2014 High String Voltage to Ground
- [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
the string-to-ground voltage is abnormal, which may cause power degradation risks.
- [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
if no pid compensation device is deployed in the system, disable the pid protection function. note: if the pid protection function is disabled but the nighttime reactive power compensation is enabled, pv module degradati…
- [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
if there is a pid compensation device in the system, check whether it is faulty. if yes, rectify the fault.
- [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
check whether the device and pid compensation device have consistent compensation direction settings. if not, adjust the settings based on the pv module model. (note: if the pv– is set to positive offset, the voltage bet…
- [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 34 official manufacturer document quote verified
if the alarm occurs repeatedly, contact your dealer or technical support.