I'm still using SOC and I initiated a manual charge with the 6000xp for 2 ea. wall mounts. The inverter was only showing 55.9 volts at 100% and then settled at 54.2 volts. For charging by voltage, what is the recommended EG4 wall mount battery charging voltage? Awhile back I was told 56.2 volts
My batteries are the Basengreen DIY 314aH/16.2kWh with an active 2A balancer and I originally assembled and connected 2 packs together and I ran them down to 5% by charging our EVs and then let it fully charge in order to reset the SoC coulomb counter in the BMS. This was because I was using SoC for charge control in the 18KPV. But I did noticed the 18KPV stopped charging with a 100% SoC but going into the BMS configuration software they showed 98% SoC. Balancing was happening since that was set for 3.45V(54.4V) but even after 3 days of good sun they batteries didn't get fully charged.
I've since added a 3rd DIY battery pack and ran it down to 3% SoC and as I'm running them all to a full charge I have switched the 18KPV to use voltage level for charge control and I set the top Charge Voltage Limit to 58.3V since the BMS and battery manufacturer states 58.4V as max upper charge voltage.
Yesterday I saw my batteries reporting 100% SoC while only at 54.45V and before I lost sunlight/charge power I saw 7kWh go into the batteries and still only saw 85.5V so there's a decent amount of capacity missing from my previous SoC charging. I think I will try switching back to SoC level charging and then in a few months revert to Voltage level charging and see if there's a change in capacity. I have my discharge cut-off set to 50V which equates to ~5%.
I will update this msg when I see how many kWh go into the battery today to get it to 58.3V/100% SoC.
