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Light Overland Vehicle Tech Tech issues, tips and hints, prepping for travel
Under 3500kg vehicles, e.g. Land Cruiser, Land Rover, Subaru etc.
Photo by Igor Djokovic, camping above San Juan river, Arizona USA

I haven't been everywhere...
but it's on my list!


Photo by Igor Djokovic,
camping above San Juan river,
Arizona USA



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  #1  
Old 16 Mar 2012
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dua battery system for hdj80

hi all
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
cheers all
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  #2  
Old 16 Mar 2012
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Hi Omar,
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
Sam
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  #3  
Old 16 Mar 2012
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Quote:
Originally Posted by Niva Say Never View Post
Hi Omar,
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
Sam
Hi Sam
thanks for your reply
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
cheers
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  #4  
Old 16 Mar 2012
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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
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  #5  
Old 16 Mar 2012
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Just thought.....
I assume your landcruiser is 12 volt
Is that right?

Doesn't make much difference, just which diagram i'm looking for!
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  #6  
Old 16 Mar 2012
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Quote:
Originally Posted by Niva Say Never View Post
Just thought.....
I assume your landcruiser is 12 volt
Is that right?

Doesn't make much difference, just which diagram i'm looking for!
yes Sam its 12 v
right now was checking dual battery kit
something like that
Ironman 4x4 Dual Battery Kits 275amp
but its b.... expensive ,
i know nothing about electricity so im trying to learn
thanks a lot for your kind help mate
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