Solar Power

DIY adding solar power to a motorhome part 8 building cable

part 8:
building cable

At this point in the project, the solar panels are mounted and wired, the wires have been run in from the roof, and the batteries are mounted and wired together. Now it’s time to run the wiring to all the other components.

Original conclusion:

I’ve finally completed building this complicated cable assembly. I ended up running wires through the loom in both directions.

As mentioned in the first part of this video, I ran the following wires through the loom toward the batteries:
inverter remote cable
trimetric harness
26-gauge to forward battery

I ran the following wires into the loom starting from the batteries:
temperature sensor
ground wire
charge controller battery + and –

If you look carefully you’ll see each of these wires going into or coming out of the wire loom at different points. It was a challenge trying to pull wires into the loom from both ends and get them all to fit. In the end it worked!

All the major components are in place and wired together. In the next part I’ll show what happened when I turned everything on.

Notes referenced in the video:

Wire Harnesses:
You’re seeing a bunch of wire harnesses in this part. The one going into the floor is the new one. The one going through one of the holes I drilled in the wall (to the left) contains the solar wires from the roof. The rest are wire harnesses that were in the rig when I bought it.

Circuit Breakers:
The circuit breakers are installed in the “big baby box” I referred to in the unboxing video. Notice the harness going into the wall with a hole underneath it. This is the cable from the roof. I’ll use another harness for the wires from the controller to the batteries and run it through the empty hole.

Wire Guage:
Remember I’m using 4 gauge from the roof to the controller? Normally you use bigger wires from the controller to the batteries because you’re pushing more current through. But 4 gauge is big enough for my current needs, so I’m using the same wires in and out of the charge controller. It’s also a shorter distance to the batteries so that helps too. If for some reason I ever need to upgrade these wires, they are relatively easy to get to.

If you haven’t seen the other videos in this series, part 1 is here (along with links to shorter clips from the video in case it’s too long for you):