dua battery system for hdj80
want to add a dual batteries to my hdj80
as i live in Egypt ,i don't have much options so i want to do it my self ,
heard of the smart battery isolator !!!!
so I'm planning to get extra battery and a tray to hold it ,cables and what else so i need ?
sorry for my silly questions
I assume you want the original 12v battery that runs the car electrics, plus another 'auxillary' battery to run extras. Both to charge off the original alternator?
I use a solid state diode block to achieve this.
They're simple with no moving parts (like relays) to fail.
There are far more complicated and expensive (some would argue better) ways of doing it, but this works just fine for me.
Just make sure everything is properly rated for your alternator (100 amp would more than cover it i think. My 24 volt 60 series has an 80 amp alternator)
And make sure any additional cables are properly fused.
All the best
thanks for your reply :thumbup1:
if you have photos of what you did it will be great
i need the second battery for the fridge ,lights, and other things when i go deep desert trips
No problem Omar,
I'll take some photos this weekend and send you a link.
I'm not sure how much they'll help though.
I'll try to find a wiring diagram I drew a while ago, if I can find it, it'll be much more help.
Don't rule out 'smart charge' options just because I don't use them though, I don't know anywhere near enough about them to be telling you what's right or wrong. I just love the simplicity of a diode system.
Give me a day or two and I'll post you some more info
I assume your landcruiser is 12 volt
Is that right?
Doesn't make much difference, just which diagram i'm looking for!
right now was checking dual battery kit
something like that
Ironman 4x4 Dual Battery Kits 275amp
but its b.... expensive , :thumbdown:
i know nothing about electricity so im trying to learn
thanks a lot for your kind help mate
No problem at all,
How much do they charge for that setup?
This is the sort of thing I'm talking about
Sterling 130A 1-in/2-out Split-Charge Diode
(No experience with this seller, just the first decent picture I found)
It just needs connecting up to the two batteries. That's it.
No displays or other fancy stuff.
As long as it's properly rated, there isn't really anything to fail.
If you want to keep it really simple and reliable and cheap then just put starter size cable from pos of battery 1 to pos of battery 2 via a battery isolater switch . You then earth battery 2 same as battery 1 ie to chassis .
This system allows youto use battery 2 as a reserve jump start battery , but it does rely on you switching to connect at start up and switch disconnect when stopped. So you need to think how reliable you are ? :thumbup1:
Agree with that totally, it is split charge in it's purest form.
Me......i'm probably not reliable enough!!
You can very easily jump start yourself when using a diode block too.
Just clip a single jumper cable between the two outer pins on the diode block.
Hi again Omar,
Here are a couple of diagrams I drew.
This is using a diode block
Diode Split Charge | Flickr - Photo Sharing!
And this is using a battery isolator switch
Isolator Split Charge | Flickr - Photo Sharing!
I'm going out to work on my 60 now, I'll take some photos and post them later.
Sorry for the delay, but here are some photos of my instal.
As I thought, I doubt they'll be of much use.
This is the diode block. I've mounted it behind the front grill so that it gets some good air flow. They generate a fair bit of heat, so putting it next to the engine would not help.
IMG_0289 | Flickr - Photo Sharing!
IMG_0288 | Flickr - Photo Sharing!
Here is a 100A fuse that takes the power from the diode to the batteries (mine's 24v) in the rear.
IMG_0291 | Flickr - Photo Sharing!
This is all the electrical stuff in the rear, all to do with the auixiliary batteries. The isolator switch is at the top right. The row of fuses are for everything on the auxiliary circuit.
IMG_0292 | Flickr - Photo Sharing!
Here are the two auxiliary batteries.
IMG_0293 | Flickr - Photo Sharing!
Hope this helps some.
Let me know if you've got any specific questions.
when my Dual battery is ready will share photos in here ,
thanks again and all best wishes to you from Egypt
Important safety point , make sure that you have easily accessible isolator switch preferably on battery earth side for all batteries esp if mounting diode block as shown , as there is fire risk if suffering front impact , also secure batteries and make sure anything conductive cannot fall on and short out terminals inc on isolators . There is a lot of energy stored in batteries !!:thumbup1:
you are totally right safety always first
No problem at all Omar, good luck with the instal.
All very valid points made by Tacr2man.
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