iStore Inverter Alarm 2021
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iStore error 2021: String reversed
iStore alarm 2021 usually means the inverter’s Arc Fault Circuit Interrupter (AFCI) self-check process has failed.
The AFCI system is designed to detect dangerous DC arc faults within the solar system and help reduce the risk of electrical faults and fire hazards. When the inverter cannot successfully complete its self-check, it may stop normal operation until the issue is resolved.
Possible causes include a fault within the AFCI monitoring circuit, a failed AFCI component or an internal inverter issue affecting the safety monitoring system.
Contact e-Solar before resetting the system
If iStore alarm 2021 appears, the inverter’s arc fault protection system should be assessed before the system continues operating.
Our Perth-based solar team can inspect the inverter and help determine whether the issue is related to AFCI circuitry, inverter electronics, firmware 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 to bypass any safety protection systems. If the issue is persistent, a qualified technician may need to perform further testing and determine whether repair or replacement is required.
If you’re unsure, don’t risk it. Contact e-Solar for safe, local support.
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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iStore 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 iStore inverter models. If your inverter is showing error code 2021, 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 iStore inverter support backed by local experience, honest advice and long-term solar care.