Skip to content
EN

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

Alarm 2077Off-Grid Output Overload

Name in the manufacturer's documentation (fault list): Off-Grid Output Overload[1]

In plain words (editorial)

The off-grid (backup) output is overloaded or short-circuited, or the irradiance or battery is too low for the load. The manual says to check for a short circuit, check that the load does not exceed the rated power, and remove some loads; then clear the alarm.

When to call a service technician: If it persists with fewer loads, contact your installer.

✎ 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. 68 official manufacturer document quote verified 2077 Off-Grid Output Overload
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified the output is overloaded or short-circuited.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified the irradiance or battery is low.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified check whether the device output is short-circuited.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified check whether the device load exceeds the rated power.
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified if the irradiance or battery is low, remove some loads.
  7. [7] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 68 official manufacturer document quote verified after the preceding problems are resolved, manually clear the alarm.