Ant

I don't have experience with SLA batteries only lithium. The visual clues show over charging caused this. Looking at your values in the lower left corner your Bulk Charging Values and Float Charging values seem too high ? Check the battery manufacturers specification for the correct values. What temperature does the environment around the batteries fluctuate too ? Operating Temperature can have a part to play if it is exceedingly high... I hope you find the problem !

Thanks Costa for your post, it was helpful in trouble shooting my Warning 32 , on an Axpert 5kw King after installing some fresh Pylontech batteries. After several attempts to boot without this Warning 32 , I gave up and called it a day. It was highly frustrating , I disconnected batteries and PV solar strings and attempted a clean boot many a time from the battery power, to no avail. On return the next day I decided the only thing left to do to get a clean boot without this error is to FIRST disconnect my AC Input voltage completely, the PV string and batteries were already off the entire night . And presto, on first start I had no Warning 32 the next day! I surmise that the AC Input was keeping something alive in the Axpert enough to hold the warning in memory, even though the batteries were off for longer than 5 minutes the day before, and the unit appeared absolutely powered off. Perhaps you really need to rest the unit for a stubbornly long time to get all the caps drained! i.e. hours ! We know that this unit can ONLY be powered up by a battery , but this situation perhaps suggest that the AC input has a small enough effect to keep the warning 32 in memory? -Just my opinion. My suggested solution for anyone else having this problem, would be to disconnect the PV solar strings, AC Input, and then the batteries and watch the unit power off. Wait as long as you can . Then power up the batteries only to get the clean boot and no warning 32. Switch on your PV Input and AC Input once the unit has settled.

I have exactly this same problem after installing a new SOL-I-AX-5K on the weekend, firmware 71.50, when solar is available during the day and it reaches the lower battery threshold it does charge from solar, else at night if this happens it charges from utility. I suspect its either setting 01sbu , or setting 16 which I have tried as sbl ucb , but changed with no luck. I dont find the SOLAR only option. I did not have the opportunity to reboot the system after the changes, I read somewhere that this might be required for some settings ? Also I read that firmware 71.50 might not be the greatest. Manual link here: Axpert King 5KVA If someone can shed some light that would be greatly appreciated !