How to wire a solar panel junction box (or terminal box) is one of the most commonly asked question that we receive. This is a short introduction on how to wire a solar junction box.
- To begin, unscrew the 4 screws in order to open the junction box. Inside, you will notice that there are more screws than you might expect. There are only two screws that you will need to unscrew. These are the ones on the bottom left and right, under which there should be a positive and negative sign.
- Don't disconnect the mounting and diode connection screws.
- Bring the wires into the junction box via a conduit or directly with a cable using a rainproof cable connector.
Here are some websites for further detail photographs and explanation.
[image credit: robpatton]