A Junction Box is Easy to Wire

A junction box connected in parallel is linking wires positive to positive and negative to negative. Each box has positive and negative terminals.

Ron used red, blue and black colored wires although any color wire can be chosen. In the picture, the blue wire is connected to the positive side of each of the 6 solar panels. The red wire (also positive) and the black wire (negative) runs to the charge controller.

The wires are only connected to two screws. All other screws are mounting screws or diode connections. The wires are pulled through a weather proof connector which prevents moisture build up in the box. A 12 volt system wired in parallel, the voltage remains the same.

In this picture the wire on the left goes to the next panel in line. The wire on the right goes to the charge controller.

If connecting in series, connect negative-positive, then connect the two end panels. A 12 volt system wired in series the voltage increases by the number of panels. Six panels would be 6 panels x 12 volts = 72 volts.

From the charge controller (wire on the right is from the box on the last solar panel). The wire on the left connects to the deep cycle battery bank.

Here you can see the red wire (positive) and the black wire (negative) going to the deep cycle battery bank.

Return to Solar Batteries from Junction Box