outboundwest,
I would change to the flooded settings. Do you know how long the BZ will stay at the various stages?
I had a switch added to my Blue Sky controller that allows me to flip one of the dip switches without pulling the case apart. I'll sometimes use that setting late or early in the day to get the voltage up.
Your system is working ok--but I think you might garner another 10 to 15 amps by changing to a better quality MPPT controller. I'd suggest a single 80 amp unit be used.
The Magnum PT-100 has some quirks. To get to the 100 amp rating, input voltage may need to be 72 volts or higher.
