Solis Inverter Alarm: 1022
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Solis alarm 1022: DC bus voltage and DC bus half voltage is not correct
Solis alarm code 1022 usually means the inverter has detected that the DC bus voltage and half bus voltage are not correct. This points to an abnormal voltage condition within the inverter’s internal power conversion system.
Alarm code 1022 may appear as:
- UNB-BUS
When this happens, the inverter may stop operating or disconnect from the system to protect its internal components.
This is not a normal operating message and should not be ignored if it keeps coming back. It may be linked to internal voltage imbalance, inverter hardware behaviour, PV input issues, DC bus circuit faults or another electrical issue within the inverter.
Let e-Solar check your inverter and internal voltage behaviour
If the alarm appears once and clears after a restart, the inverter may have recovered from a temporary internal voltage condition.
If Solis alarm 1022 keeps returning, it is worth having the system checked. Our Perth-based solar team can inspect the inverter, review fault history and help determine whether the issue is linked to DC bus voltage imbalance, PV input conditions, inverter hardware or another system fault.
Contact e-Solar and let us know:
- The exact error code on the screen or app
- When the code appears
- Whether your solar production has dropped
- Your inverter model, if you know it
Do not open the inverter or attempt internal electrical checks yourself. If the issue is persistent, a qualified technician may need to assess the inverter’s internal voltage behaviour, DC input and system safety before recommending repair, warranty support or replacement.
Get In Touch Today
Not sure what the error code means? Send us a quick message with a photo of your inverter screen. We’ll help identify the issue and guide you towards the safest next step.
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Solis Inverter Repairs and Fault Support
We understand that every solar system is different, which is why our repair and fault-finding services cover a wide range of Solis inverter models. If your inverter is showing error code 1022, our experienced technicians can help determine whether the issue is linked to grid voltage, inverter settings, site wiring or wider network conditions.
With over 22 years supporting Perth solar systems, e-Solar has seen all kinds of inverter faults and performance issues. We’ll assess your system safely, explain what the code means, and recommend the right next step to help get your solar running properly again.
Trust e-Solar for reliable Solis inverter support backed by local experience, honest advice and long-term solar care.