Dual battery setup in 1997 4runner

thanks for this post, i am planning on doing a dual battery mod and this will be most helpful. are you running the stock electrical system completely off the starting battery and any and all mods of the support battery?
 
would installing a bigger alternator(cs144) have the same effect as have two batteries?
No. A bigger alternator would just help with running high electrical loads when the engine is running. The advantage with dual batteries is you can run electrical accessories without the engine running using the deep cycle battery, but still have the main battery available to start the engine. The wiring setup isolates the starting battery automatically when the engine stops.
 
thanks for this post, i am planning on doing a dual battery mod and this will be most helpful. are you running the stock electrical system completely off the starting battery and any and all mods of the support battery?

Exactly, We have a Fridge and inverter running off the Yellow top (Secondary), the Red top (Primary) is our starting battery.
 
You might want to reconsider running a winch of both batteries, You will drain them both and then your stuck... are you sure you need two batteries to run a winch?
 
It was an idea that i was throwing around to get more power with out needing to rev my engine, but i definitely see where you are coming from. It would be kinda pointless to have a second battery just to drain both and still be stuck.
Electrical isnt my strongest subject. I understand how it works but figuring out the best way to route stuff and power required over time and all that hurts my brain after a while. Thanks for the info.
 
It was an idea that i was throwing around to get more power with out needing to rev my engine, but i definitely see where you are coming from. It would be kinda pointless to have a second battery just to drain both and still be stuck.
Electrical isnt my strongest subject. I understand how it works but figuring out the best way to route stuff and power required over time and all that hurts my brain after a while. Thanks for the info.

you generally want to run the winch off the starting battery. This is because you want to winch with the engine on whenever possible and if you attach to the main battery, the winch will be running off the alternator.

If you can't run your vehicle while winching you can simply drain your starting battery and once you are out, you can then jump your starting battery off the aux. Generally though, you can't winch with the engine running because you are stuck in water, rolled over or have some other major problem which is generally a bigger issue than a dead battery.
 
you have some great write ups, really simplified the dual battery install. I know a few people running the edgestar fridge and they all love it. basically the same internals as the more expensive fridges. All i need is more money now :redbrick:
 
We just added an additional article that goes over the custom cargo area we built in our 4Runner Blue gets a bit more Junk in the Trunk. Our Plan is to drive from Seattle to Argentina starting this October, the trip will last about 18 months, so this article is all about the storage of our gear.

Thoughts? or suggestions ?
 
Last edited:
Nice work. I like your site too. What arrangements have you made for getting your vehicle from Panama into Columbia?

Regarding the new cargo area, if you haven't already planned to do so, make sure you give it a good workout before you leave. I've seen a few homemade setups fall apart after a few hours on rough corrugated roads, especially when fully loaded up. You can never make those things too strong.
 
We will be shipping the vehicle from Colon to Cartagena Colombia, No official arrangements just yet, but we know of a few people there that will help us set the shipping up.... Going to be fun, no doubt... depending on if you have your own container or sharing it, we are looking at $1000 or $600 for the vehicle shipping.

I know exactly what you mean with poor quality... Learned my lesson in Africa ;)
We have been testing like mad, doing fully loaded trips on as much bad road as possible... All we can do now is go ;)
 
First Nice site, and build. I'm also a bit jealous of your upcoming trip!

In checking out the sight i did have a question... Is there a reason you went with the ANL fuses over a circuit breaker? I used the circuit breaker with my electric fan conversion figuring if i ever had a problem I should be able to trouble shoot/repair the problem with out the need to carry around more fuses for a just in case situation.
 
Aditional Modification to the Battery system.

Just thought I would make an additional post on the condition of the battery install and the life of the batteries.

The modifications are holding up really well after 7000 miles through the US and Mexico, temperatures have ranged from 18 degrees to 107 on and off paved roads.

We dd however buy the [Dual Battery Monitor |http://www.nationalluna.com/dualmon.htm] from National Luna. We were worried that the life of the batteries were going south, but after installing the monitor we can safely say that they are both in Good health and that the Alternator is working really well.

If you plan on using the National Luna components as we have get the monitor, it is peace of mind.
 

Members online

Forum statistics

Threads
278,310
Messages
3,554,079
Members
248,016
Latest member
Advally Service

Trending content

Back
Top