I came across this thread and have found it very useful as I am having similar problems. I have 10 panels of 325w and a 5kW inverter and running 5 huawei 100ah Li ion batteries. The batteries never seem to get full and end up on 47v and the inverter (MECER) indicates two bars indicating about 50 percent power. I am not sure about the battery settings though. Can anyone please advise.