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Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)

Alarm 2001String Voltage High

Name in the manufacturer's documentation (fault list): String Voltage High[1]

In plain words (editorial)

The voltage coming from a PV string is too high – according to the manual this happens when too many modules are connected in series. The manual warns that an input voltage above the maximum DC input voltage may damage the inverter. The alarm clears by itself once the PV array is configured correctly.

When to call a service technician: Have your installer check the string configuration. Contact your installer or Huawei technical support.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

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. [1] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 12 official manufacturer document quote verified 2001 String Voltage High Major
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 12 official manufacturer document quote verified The PV array is not properly configured. Excessive PV modules are
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 13 official manufacturer document quote verified If the DC switch is on, check the series connection configurations
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 13 official manufacturer document quote verified than the maximum input voltage, contact your vendor or
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 13 official manufacturer document quote verified array is correctly configured, the device alarm is automatically
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 13 official manufacturer document quote verified If the DC switch is off, contact your vendor or technical support.
  7. [7] SUN2000-(3KTL-10KTL)-M1 User Manual (Issue 28, 2026-03-30) (EDOC1100163578 Issue 28) , p. 103 official manufacturer document quote verified If the input voltage exceeds this value, the SUN2000 may be damaged.