Riaan Claassens Posted April 13, 2022 Posted April 13, 2022 Good mornig. I have a client running a Mecer SOL-AX-8M 8kW inverter, paired with 8x 12 volt 200aH VRLA batteries, and 12x 430Watt solar panels. The system works generally well and has been used purely for backup purposes until recently when the client installed additional batteries and wanted to start using the inverter in a "solar first" approach to start saving on electricity. The issue is that when the output source priority is set to SUB (solar, utility, battery), and the sun is for example rising in the morning and the solar power is insufficient to carry the load, the batteries are supplementing what the solar doesn't, and not Utility. Every morning the batteries are charged full, but by the time the sun is effective enough to power the loads, the batteries are down to about 52.5V (70 - 80%). With the batteries being AGM, we want the cycles to remain to a minimum. Please advise if this is possible with this inverter. Thank you. Quote
Riaan Claassens Posted April 14, 2022 Author Posted April 14, 2022 Is there anyone with some valueable information to share here? Quote
Steve87 Posted April 14, 2022 Posted April 14, 2022 Hi Riaan, I own the same said inverter. The devil lies in the details with all of the Axpert inverters. Just by making a mode change to SUB might not be the only thing needed to accomplish what you want. Can you please write down and share the menu settings of the following: 2= Max charging current amps, 5= Battery type, 11= max utility charging current amps, 12= setting voltage switching to utility, 13= setting voltage switching to battery, 16= Charge source, 26= Bulk Voltage, 27= Float voltage, 29= Battery cutoff voltage... Somewhere in these settings lies the answer. Quote
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