100 Series Land Cruiser 12V Setups

[thebighundy]

Hi all,

I will be building a relatively simple 12V system in the coming months and I am curious where people have put their second battery, DC/DC chargers etc. I will be using lithium so engine bay is out of the question. I goal is to use at little space as possible in the rear as I generally have quite a bit back there on trips.

Just want to see other people’s setups as I am at a bit of a roadblock with mine. I would love to make a gull-wing window to have everything centralized there, but it doesn’t make the most sense cost wise for what I am trying to do (fridge in summer, heated blanket, camp lights, charge drone and camera equipment)

 

[e9999]

Check out the newer "mini" 12V lithium batteries. Those are much smaller now for the same capacity. Very nice if space is limited. And the lighter weight makes it much easier to install safely.

 

[Hugh Heifer]

If you are not going with a dual battery system, try an Anti-Gravity battery. @BMThiker is running one with a solar on his FJcruiser and it has been good.

Lithium with a piggy back back up

 

[GTV]

Power station?

 

[RKRUGER]

You can check out my install here. Victron DC/DC charger install ARB Drawers - https://forum.ih8mud.com/threads/victron-dc-dc-charger-install-arb-drawers.1349090/page-2#post-15944132

Obviously it is specific to mounting the mini -LiFePo in the wing of the ARB drawer set, but the rest of the hardware should work out well for you. I am getting 4+ days of running time on my ARB Classic in hot summer weather, never drawing down below 50%.

Most will tell you that you need a good battery monitoring system (BMS) to track both amps in and amps out to understand what is going on with your battery. Some of the new minis have Bluetooth monitor built in.

 

[Edwardsrealtor]

Why not use a heated lithium?

 

[Shoredreamer]

640ah tucked in around this Trekboxx system. 360 watts on the roof, 2000w inverter. Forever power! LX570

 

[thebighundy]

That's what I am talking about! 640AH is diabolical, are you running Redvision or any other REDARC management/BCDC or just using the inverter?

This project is put on hold for me unfortunately while I decide if I want to jump up to a 200 Series this winter or stick with the 100 Series and "make it work".

 

[Shoredreamer]

This was a customer install I did. 640ah is definitely over the top! It’s got an Alpha 50R for charging and monitoring. No Redvision, just fuseblock distribution in back and Switch Pros up front for lighting and driving accessories.

 

[SuperExciteBike]

Recently put together a 12v system with 100ah mini LFP, Victron 18amp dc dc charger, MPPT solar.

I built it on a 1/2" plywood board

Then mounted it on the back of the ARB drawers

Yes, it clears the seats. USB ports and 12V cig port here for plugging in a fridge.

Battery mounting plate made of spare wood, extended length M10x1.25 35mm bolt to hold it down.

WattCycle 100ah Mini Smart LFP mounted sideways

 

[SuperExciteBike]

And some OEM style switches from aliexpress.

250A relay between the LFP negative terminal and all connected accessories, tied to the Aux Battery switch. Pressing it disconnects everything in the entire rear LFP system.

 

[SuperExciteBike]

Original system diagram that I didn't quite follow exactly and probably went a little overkill with the fuses LOL. Recommend mapping it out like this before you start so you know what you need.

 

[SuperExciteBike]

Inverter will go in the right side drawer wings. Right side panel of the ARB wings will have another 12V DC cig, anderson style port for solar input, 110V socket.

Planned accessories powered by the rear battery:
Fridge
USB charging
AC charging
Small LED hatch lights in both warm white for visibility and red to preserve night vision and minimize bugs when camping.
Roof rack mounted flood lights (amber for crawling and red for camping). Left side and right side with separate control for powering each side.
Forward facing light bar, switch in the front driver area.
Ham mobile radio

 

[thebighundy]

This is fantastic, and exactly what I was hoping to see! Thank you for posting with such detail.

I apologize to everyone for my lack of progress on this thread, work has become busy along with a surprise structural fix that required some unique fabrication (tore the trunk of my MCS equipped Z3 at the track recently and have been fabricating an I-Beam fix myself, easy albeit laborious).

That said, I have collected some of the core parts required for this:
-REDARC BCDC1250D 50a charger
-Victron 500W inverter
-BMS System
-100AH LiPo4 Battery

Once I figure out where I want to put everything, I will get started. That is my main concern at the moment and what is keeping me from diving in on this, and the lower ball joints I destroyed in Moab over new years

Photo of my truck doing the Delores River Crossing in Moab for entertainment for now

 

[isagard]

Sorry to revive this old thread, but was wondering if anyone in this thread who installed one of these rear dual battery setups could tell me where they ran their ground wire? Been trying to avoid drilling a new hole in the chassis, so was considering the rear factory ground point, but wasn't sure what other guys had done

 

[SuperExciteBike]

Sorry to revive this old thread, but was wondering if anyone in this thread who installed one of these rear dual battery setups could tell me where they ran their ground wire? Been trying to avoid drilling a new hole in the chassis, so was considering the rear factory ground point, but wasn't sure what other guys had done

For chassis ground I think I used one of bolts on the back of the arb drawers. It works because the drawers are bolted into the 3rd row seat mounting points in the cargo floor. In other words, you can use the 3rd row seat mount for ground.

Plenty of options to ground in the back. Factory tie down points would probably work too. Or remove one of the side interior panels and find an existing bolt hole.

 

[isagard]

For chassis ground I think I used one of bolts on the back of the arb drawers. It works because the drawers are bolted into the 3rd row seat mounting points in the cargo floor. In other words, you can use the 3rd row seat mount for ground.

Plenty of options to ground in the back. Factory tie down points would probably work too. Or remove one of the side interior panels and find an existing bolt hole.

Thanks, appreciate it!