The characteristic of the Inverter changes how it treats the battery when it is in CLOSE loop. I noticed is better regulates the battery then open loop. Example when the battery hit its low end. In my case 5% SOC, in close loop it maintains the battery by even adding 1W to it to keep the voltage exactly as it should be. VS when I was in Open loop it continued to drain the battery at 20W-30W and the voltage kept droping from 49 to 45 fast. See photo. There are also other facts differences in close loop that I prefer my batteries to stay set this way. Both the inverter and batteries are working perfectly and now its just fine tuning for optimal setting. Sol Ark Tech support did recommend to keep it in in Open Loop and they said its not a matter if it will happen or not, it is a matter of when it will change setting in the inverter and cause it to fault. I will keep my battieres in close loop and will deal with any faults as they come. Sol Ark need to support the batteries the customer choose. In this case I chose EG4 Wall Pro based on reviews, spec and cost/watt. If anything happen to my inverter as a worst case scenario, well then the GRID BOSS will be NEXT!
