Towing ?

Okay, one caveat to that is most modern vehicles have a "smart" alternator. When we did the conversion to LiFePO4 battery, I found that the tow vehicle was getting power from the trailer. I started a trip with a full battery and the alternator just loafed because the LiFePO4 battery's voltage was high enough that the alternator's programming "thought" it i did not need to provide power. I ended up on that trip with a rather depleted LiFePO4 battery. I then realized that I needed to do something different so I added a DC to DC converter from Renogy. To power it, I added a dedicated circuit from the tow vehicle. I could possibly have used the 7-way connector and just disconnected the wire underneath the trailer and run a separate wire to the DC to DC charger, but I did it this way so that I could also put in a battery isolation solenoid. This is the one I bought:

I do have a write-up in my mods detailing that conversion. With the Grey Wolf which has solar, I got an MPPT controller that can also use the solar as well as the vehicle for input. I still have the DC to DC converter. I would be willing to part with it if you would like to put it to use.