Re: charge controller readings
Let's see. Six 75 Watt panels is 450 Watts. Less a typical 77% efficiency derating is 346 Watts. Divide by 24 Volts nominal = 14 Amps peak current, which is 4% of 340 Amp hours. You're seeing 11 Amps, which is only 3%. You're going to run out of sun before that array manages to get the battery Voltage up to Absorb level.
Solution: get enough panels to charge the battery bank. You've got about 1/2 the amount needed.
Before you do that, find another way to charge the batteries before it's too late.
Just to cover bases, check the Isc on each panel and the insolation too. Watch out for long wire runs from array to controller or too small wire size; either can eat up Voltage when under load.
Oh, and you shouldn't disconnect a controller from the batteries if there are panels connected to the input. It can be bad for the controller.
Four 175 Watt panels, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.
Ohm's Law: Amps = Volts / Ohms
Power Formula: Watts = Volts * Amps