But the biggest issue anyone is going to face here is the cost. Another great option with the lithium is we would basically need another two of our current deep cycle batteries to get the same performance as one lithium. The lithium battery we will be getting will be a 125AH and will weigh almost 20 kgs less than our current deep cycle battery that weight saving is huge. We knew we would eventually install a lithium battery because of their weight, how quickly they charge and how they can pretty much go flat without causing any issues. We have since sourced a lithium battery off a supplier at a ridiculously good price so will be adding this in 2021. There is nothing wrong with this battery if you are looking at one of these but we only every purchased one as it was cheap and for the short term. Initially we decided to add a cheaper deep cycle AGM battery and chose to use an Adventure Kings one. However, this was going to be added at a later stage due to cost. We decided at the start of the build that we would add a lithium battery to our 4WD 12V electrical setup.

4 x anderson plugs connected to draws to allow easy removal without having to disconnect all the electrical components if ever needed – red for power from main battery, green for solar input, one grey to trailer, and one other grey for the earth.

Isolator switch to turn off all power from second battery and allow easy removal.

Earth block plus a second earth terminal for larger wiring.

2 x fuse boxes connected to allow for a total of 12 fuses.

240V Thunder battery charger for 240V charge when needed for deep cycle AGM battery.

1 x external green anderson plug for solar input to charge second battery.

1 x external grey anderson plug to charge trailer battery.1 x internal grey anderson plug for the fridge.1 x power board for additional 240V sockets.7 x Adventure Kings LED camping light bars and switches in awning and rear of 4WD.CTEK CTX Battery Sense battery monitoring device for your phone.3 x double USB outputs – to charge devices including phones, tablets, Bluetooth speakers, GoPro’s, and anything else that uses a USB to charge.4 x 12V outputs – for lights in the awning and the rear of the Cruiser and a couple of spares to use for other accessories when needed.Adventure Kings 115AH deep cycle AGM battery.Redarc DCDC 40 Amp in-vehicle battery charger.Here is a list of the gear we have used and connected to our second battery in our 4WD 12V electrical setup: Remember, all those insanely fancy 12V electrical setups you see in 4WD influencer posts on social media are usually sponsored or heavily discounted, so doing the same in your setup is going to cost a bomb and let us face it, do you really need such a setup? Maybe you do… The fancier and more complicated your wiring becomes, the more difficult it will be to solve any potential problems on your own. When it comes to 12V electrical setups in your 4WD, our opinion is to keep it as simple as possible so that you know how it all works if something goes wrong. Do not go cheap on key items but save money on others. What we mean here, is all you need is a good setup using decent gear having everything you need. This does not mean you need to spend an insane amount of money on top of the range battery management systems with big LED displays and Bluetooth connectivity. As anyone who does a lot of camping, touring, overlanding, and exploring knows, a good 12V electrical setup in your 4WD is a must.

Dual battery setup with isolator