I am looking to install an Anderson SB50 power harness to our 2025 Land Rover Defender 110. It is a P400 mild hybrid. We had a look around the vehicle and spotted an electrical hookup in the engine bay. See pictures. I would then run the cable down and underneath the covers to the rear of the vehicle and pick up the negative earth there. This is to plug in a camper and charge the batteries on the road. I have seen multiple ways of doing this. Some take the power from the battery under the seat, I have read about folks taking power from the 48V hybrid battery. The camper will take both.
I would be interested if anyone has done this. Land Rover dealer does not and will not help.........mumbled something about a warranty.
Any advice on how best to do this or identification of the plug so I can purchase one would be greatly appreciated! Thank you.


Battery terminals left side under bonnet

Connectors. One used and one spare. Is this to hook up a winch? Land Rover dealer did not know what this was for.

 

So I took power from the 48vdc to 12vdc converter under the rear load space. Added a relay so that power isn't always live. I also moved the trailer connector to the flat area near the license plate. See this Thread and this.

 

Thank you, Adamalli. This looks to be a great place to take the power from rather than the 12V battery and a shorter run. How did you get the wires out of the boot into the bumper without compromising the integrity of the vehicle? I do not want any water leaks or perforation issues.

 

There is a rubber plug on the back lower wall. I simply cut a hole and ran the wire through it. If you look through the 2nd battery thread there is a description of the route. The plug is roughly behind where I put my second battery.

 

Thank you, Adamalli. I will take a look at the weekend and take a look at your 2nd battery thread. Appreciated.

 

Wire glands/Cord grips/bulkhead fittings. They have several names. Trick is getting the right size for the wire you're running through the body sheet metal.
https://www.mcmaster.com/products/wi...s/cord-grips~/

 

@Adamalli is a way smarter engineer than me. I gave up in middle school after tangling with an electrical fence around our pig lot growing up. I'm just a simple red-neck. Depending on the amount of current you want to draw, this may work for you from PowerfulUK: Link . Even a video to show how it installs at the end of the page. I trickle charge thru it. Good luck, post pics after you figure your route.

EDIT: NM. I looked up the Anderson SB50 harness. That 50amps is going to be way more than the tow bar loom is going to be rated to handle. Still: good luck/post pics.

 

If you can design your overall system then it makes sense to setup your battery bank in a travel trailer with more than 12v.

A 48v system is really ideal as the higher voltage will mean lower amps, smaller/lighter conductors, and easier overall wiring. There is a good reason why the hybrid system has the 48v complexity in the Defender. These same higher load design concerns apply to an inverter/charger system in an RV as well.

Of course that means a whole extra level of complexity but if you are up to the challenge definitely give some thought to that approach.

 

Thanks H1Tad. Appreciate the advice and link where to buy.

 

Thanks GrouseK9, good reminder on the tow bar loom not being rated for the SB50. I am using this to charge a couple of 48V Lithium cells in our camper. I'll post some pics when done.