I wanted to share a recent answer to my low solar output question. I recently expanded from 1000w to 1500w. Changed from 4in series over to 2 strings. However, before all that I noticed something very important when reviewing my daily solar output graph (woot midnite solar). I was looking at the wrong thing! It was more a question of INPUT. I have my bulk charge set to 58.3 volts, that because my POS inverter over faults at 59v. The midnite 150 does an amazing job at regulating charge voltage. All the midnite 150 uses to keep the battery in that voltage during bulk is what it needs, not what the panels produced. My KWh reading was what it put in the batteries, not what the panels actually could have made.
So one sunny day, I get this thing pissed off! I run the a/c unit, all my power tools, radio, charge phone, freezer. All off the inverter (almost 2000w consistent). The night when I looked at the screen, low behold a 4KWh day! Holy **** self! After that day the kWh Ingested were simply 3.0, then 2.5, then 2.0. So problem solved, or more like clarified. I hope this helps someone in the future.