Breakers are for 120v AC, the regular household outlets and how the converter gets power.
Red is battery + input, blues are two seperate circuits (fused on the front of the power center), you do not have to use both, cap one off if ya like.
Power centers with conv/off/batt do not charge batts, in the batt position, 12v enters via the red wire and goes out the blue, in conv position, the batt is disconnected and 12v converter dc goes out the blue, the white is neg/common/chassis.
In OFF, both the converter and battery are disconnected.
