Posted January 2, 20223 yr Hi..I have this Axpert/Mecer 3kva inverter. Connected to 2 x 100a batteries and 4 x 375w panels. The average load is under about 400w. Every now and then the Inverter switches off totally- goes into fault mode and generates and undocumented Error Code 20 I suspect its to do with switching between solar and AC Power - when the sky clouds over, then opens up again. Just a suspicion. The only way to recover is to do a hard reset...cut all power to the inverter including from the batteries...and reconnect. Any idea whats going on here? Thanks Ian
January 3, 20223 yr 20 hours ago, IanDee said: undocumented Error Code 20 What version main firmware is that? I don't see that in the three 24 V firmwares I looked at, though one is largely unexplored.
January 7, 20223 yr Author Greetings...I have U3 01 07. Inverter is about 1 year old. This morning it did the same thing...it froze up/switched it self off, but with no Error code. A hard reset sorted it out
January 7, 20223 yr 42 minutes ago, IanDee said: Greetings...I have U3 01 07. The main DSP firmware is U1. I think U3 may be the Bluetooth firmware version number, for most models (if they display U3 at all).
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