Does that mean if I have 15.3 input volts the lowest I can set it is 2 to 3 volts below this?
I pretty much reach mid to high 14's by 11 AM each day, and will spend much time up around 15.3v till late afternoon. Daily. Its what this particular battery needs. Different topic.
The wiring to the fans from the fuse block is about 6 feet of 12 awg to ~ 4 feet of 18 awg and about 10 inches of 22 awg from 18awg to the individual rocker switch back to each fan.
The combined total maximum draw of the 3 fans is under 1.2 amps. Not sure about start up surge but the max individual fan draw is .45 amps.