I am just setting up my controller. It has run a few days . It says 13.3 volts most of the time. But it says it is at 100%. It's going to be super sunny here in Seattle and I want to get this thing set up right. I have no loads what so ever just the main battery bank, inverter and fuses to future loads. I have seen charts that say 13.3 is 80 90% or so but this can't be 100%. What am I missing?