The wiring will connect the solar panels to the charge controller. Learn about wiring for solar panels from a professional in this free energy conservation video.
Alright! We've got the panels mounted and now we're ready to connect the wiring that brings the power down to our charge controller which is located on the ground. We're going to be using this BX style wire which is just twelve gage wire with a wrapping of sturdy aluminum on the outside to protect it from the elements. Typically used in household wiring, pretty common at your home improvement center, twelve gage is adequate for a small system like this. Black wire for our positive connection, the white wire will be negative. It's also called the neutral in an AC system. But for this we can use the white wire as negative, and then the green will go to our frame as a ground. So, we'll just strip a little bit of wire off here. We've got our DC wires already marked coming from the panels. Red, positive and white is negative. So we'll follow that here, again, and strip these wires down. Special wiring comes out of these panels. It's USE rated versus THHN for instance. And this USE wire is UV stabilized so it can actually be out in the sunlight for many years without degrading. We're using the shielded wire here could be in different styles of conduit or even a UV rated wire for a small installation like this. And your bigger grid type connections, all this can be in conduit and the wire choices would be a little more limited because of the high voltages concerned. But here, twelve to forty volts, we're not really as concerned with that as we might be. Still, it's nice to have everything solid. We're going to use our linesmen pliers here to get a nice solid twist on our positive wires and a little wire nut on top of that, snug it down. We've got our negative wire here, and you notice I didn't strip these both at the same time. Even through it's only 40 volts, you can still get a pretty decent shock off of these panels. So, it pays to keep the wires separate. In fact, at the other end here, we're not quite ready to make this connection, we should connect down at the bottom first before making this wire completely hot, just for safety. So now, let's leave this for a moment and go down and wire up our charge controller here in the laundry room.