Solis Inverter Alarm: 103A
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Solis alarm 103A: Low temperature
Solis alarm code 103A usually means the inverter has detected that the ambient temperature is too low for normal operation.
Alarm code 103A may appear as:
- UN-TEM
This alarm is less common in Perth conditions, but it can still appear if the inverter is exposed to unusually cold conditions or if there is a temperature sensor issue.
When this happens, the inverter may delay operation, reduce output or stop exporting power until the operating temperature returns to a suitable range.
Let e-Solar check your inverter and temperature behaviour
If the alarm appears once and clears by itself, the inverter may have responded to a temporary temperature condition.
If Solis alarm 103A keeps returning, it is worth having the system checked. Our Perth-based solar team can inspect the inverter, review the installation environment and help determine whether the issue is linked to low ambient temperature, inverter sensor behaviour, firmware, internal components or wider system conditions.
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 testing yourself. If the issue is persistent, a qualified technician may need to assess the inverter’s temperature readings, installation conditions and internal sensor behaviour.
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 103A, 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.