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

Alarm 2066License Expired

Name in the manufacturer's documentation (fault list): License Expired[1]

In plain words (editorial)

The licence (authorisation certificate) has entered its grace period or is about to expire. Licence-controlled features stop working without a valid licence.

When to call a service technician: Your installer or vendor needs to apply for and load a new certificate.

✎ 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. 60 official manufacturer document quote verified 2066 License Expired
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 60 official manufacturer document quote verified the authorization certificate has entered the grace period.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 60 official manufacturer document quote verified the authorization feature is about to expire.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 60 official manufacturer document quote verified apply for a new certificate.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 60 official manufacturer document quote verified load the new certificate.
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 60 official manufacturer document quote verified the features under license control are not available without license permissions.