Solis Inverter Alarm: 102A
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Solis alarm 102A: DC bus voltage and DC bus half voltage not correct
Solis alarm code 102A usually means the inverter has detected that the DC bus voltage and DC bus half voltage are not matching as expected. This indicates an abnormal voltage condition within the inverter’s internal power conversion system.
Alarm code 102A may appear as:
- Vbus-Sam
When this happens, the inverter may stop operating or disconnect from the grid to protect internal components.
This fault may be linked to internal voltage regulation issues, DC input conditions, inverter hardware behaviour or another fault affecting the inverter’s power conversion circuitry.
Let e-Solar check your inverter and internal voltage systems
If the alarm appears once and clears after a restart, the inverter may have recovered from a temporary voltage condition.
If Solis alarm 102A keeps returning, it is worth having the system checked. Our Perth 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 internal 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 testing yourself. If the issue is persistent, a qualified technician may need to assess the inverter’s internal voltage systems and determine whether repair or replacement is required.
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 102A, 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.