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

Alarm 2068Battery abnormal

Name in the manufacturer's documentation (fault list): Battery abnormal[1]

In plain words (editorial)

Battery problem: the manual names a battery fault, lost communication with the battery, the battery breaker opened while the inverter was running, incompatible storage devices, wiring errors on the BAT terminals and similar causes. The manual's restart sequence: send a shutdown command, turn off the AC switch, DC switch and battery switch, wait 5 minutes, then turn on the battery switch, AC switch and DC switch in that order.

When to call a service technician: If the battery fault indicator is on or blinking, contact the battery supplier; otherwise, if the alarm persists, contact your vendor or 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. 62 official manufacturer document quote verified 2068 Battery abnormal
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the battery is faulty.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified communication with the battery is interrupted.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the battery circuit breaker is disconnected during the running of the inverter.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified a battery port is connected to more than two batteries.
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified incompatible energy storage devices are connected.
  7. [7] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified communication congestion occurred due to low baud rate of the meter.
  8. [8] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the number of battery racks connected to the inverter exceeds the upper limit.
  9. [9] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the pv terminals are incorrectly connected to the bat terminals.
  10. [10] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the bat terminals are loosely connected or not connected.
  11. [11] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 62 official manufacturer document quote verified the ess software version is outdated. this item applies only to the sun2000-(6k-15k)-mbl0 series.
  12. [12] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified if the battery fault indicator is steady on or blinking, contact the battery supplier.
  13. [13] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified check that the battery is enabled, the communications cable and power cable are connected correctly, and the communication parameters are consistent with the rs485 configuration on the device.
  14. [14] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified check that the auxiliary power switch on the battery is set to on.
  15. [15] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified send a shutdown command, turn off the ac switch, dc switch, and battery switch. wait for 5 minutes and turn on the battery switch, ac switch, and dc switch in sequence.
  16. [16] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified if batteries have been removed, set battery type to none.
  17. [17] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified if the alarm persists, contact your vendor or technical support.
  18. [18] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified remove incompatible energy storage devices by referring to the product documentation.
  19. [19] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified manually negotiate the baud rate. for details, see the user manual.
  20. [20] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified if the negotiated baud rate of the rs485-2 bus is lower than 115200 bps, replace the meter with one that supports a higher baud rate.
  21. [21] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified if the fault persists, contact the vendor or technical support.
  22. [22] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified ensure that the number of connected battery racks does not exceed the upper limit. for details, see the user manual of the device.
  23. [23] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 63 official manufacturer document quote verified check whether the bat terminals are correctly and securely connected.