Parallel Dual Battery Set ups?

[Mudhog]

After some info on parallel battery set ups, I'm looking at running 2 x 750cca batteries (cranking,deep cycle style) in parallel and drawing from the positive on one and the negative on the other.

I've just upgraded my winch motor cables to 70mm and I'm looking at getting a good amp supply to it now!!

My questions are:

1. Will this help to keep the batteries evenlly charged?
2. What will the CCA be doing it this way?

Thanks in advanced for any info.

Cheers
Brett

[Sadam_Husain]

in parallel and drawing from the positive on one and the negative on the other.

might just be the way you've typed it but if your drawing off positive on one battery and negative off the other thats series which will give you 24v

parallel is both positives and both negatives joined together giving you double capacity in 12v

[rokhound]

Yeah I thought the Sadam, But I think what he means is the winch will hook onto the pos of one battery and the neg of the other.

[Mudhog]

Yeah I thought the Sadam, But I think what he means is the winch will hook onto the pos of one battery and the neg of the other.

Yep that is what I meant

Batteries will be linked by cables in parallel and the winch will draw as above of the pos of one and the neg of the other.

[Sadam_Husain]

yep so long as the 2 positives and 2 negatives are strapped together it wont make any difference, your not trying to use a VSR are you?

[red-devil]

You Cant strap the batteries up in parallel and in series at the same time.

Youll have to run some BIG ass Relays to switch between the two

[Mudhog]

The batteries will only be in parallel.

Not looking to use VSR

The truck is a Classic 2 door Range Rover, not to many other electrics to run on it

Will the CCA increase or will the RM increase?

Cheers

[red-devil]

is your winch 12 volt or 24 volt.

when battery in parrallel, your CCA will be ruffly between 1400- 1500 cca but its takes twice as long to charge the batteries.

[Shane]

So its a 12v system,2 batterys in parrallel well give same voltage(12v)twice the amps as above.
Using pos on one battery and neg on the other wont have any effect when in parrallel.main thing when running in parrallel(for battery life/charging) is that both batterys are the same make/model(unless using a VSR which you arent).I would run a earth to body and Chassis and winch,not sure how the body is connected to chassis on a Range rover,never hurts to have lots of good earths esp on dirty 4x4's(mud,grit,water etc)

[Mudhog]

So its a 12v system,2 batterys in parrallel well give same voltage(12v)twice the amps as above.
Using pos on one battery and neg on the other wont have any effect when in parrallel.main thing when running in parrallel(for battery life/charging) is that both batterys are the same make/model(unless using a VSR which you arent).I would run a earth to body and Chassis and winch,not sure how the body is connected to chassis on a Range rover,never hurts to have lots of good earths esp on dirty 4x4's(mud,grit,water etc)

I have 2 new batteries that are the same and I'm going to run both a body and engine earth cable in 50mm.

My understanding is that if I'm drawing across the two batteries and charging that way too, they should charge evenlly.

The winch is a TGWC10R 12v Tigerz11 high speed model.

I'm looking into upgrading my Alternator to something in the 100amp range.

Thanks for the info so far.

Cheers

[callum007]

pffft.. 50mm is actually rather small for winches.. ask Niblik..
the earth (neg in this case) needs to be as big as the Pos leads your running. it go 70mm or bigger if your winch specs are anything to go by you could draw 400+ amps, given a 3 meter run you could expect 10% voltage drop on your 50mm cable @ 12v..
but to answer your question. CCA rating is not really applicable in the case of a winch. but in theory big is better. a battery with high cca rating will atleast allow the high current requirements of a winch to flow, as the internals of the battery are rated to that.

you really achieve nothing by using one battery's pos and the others neg.. unless your paralleling them with piano wire.

[Mudhog]

pffft.. 50mm is actually rather small for winches.. ask Niblik..
the earth (neg in this case) needs to be as big as the Pos leads your running. it go 70mm or bigger if your winch specs are anything to go by you could draw 400+ amps, given a 3 meter run you could expect 10% voltage drop on your 50mm cable @ 12v..
but to answer your question. CCA rating is not really applicable in the case of a winch. but in theory big is better. a battery with high cca rating will atleast allow the high current requirements of a winch to flow, as the internals of the battery are rated to that.

you really achieve nothing by using one battery's pos and the others neg.. unless your paralleling them with piano wire.

Thanks Callum

The only 50mm cables will be to my starter motor and the earth leads to the trucks body and block to earth them.

All other cables are 70mm.

So there is No advantage to drawing across the two parallel batteries, I was told that this would help charge them both evenlly?

This is the set up I'm thinking of doing:

Two 750CCA matched batteries in the front corners of the engine bay.
Joined in parallel by 70mm cables(pos to pos and neg to neg)

Drivers side battery will have the winch 70mm negative cable to it and the engine and body 50mm earth cables.
Passenger side battery will have the positive solenoid 70mm cable to it and the starter motor 50mm cable.

Do you think this is Okay?

Maybe I need to wait for my local Auto sparkie to get back from hoilday?

Cheers
Brett

[niblik]

Drivers side battery will have the winch 70mm negative cable to it.
Passenger side battery will have the positive solenoid 70mm cable to it and the starter motor 50mm cable.

Do you think this is Okay?

i cant comment on running different applications off seperate batteries but i was told by a sparky friend to just run everything off the one battery.. as long as you've done what you said with wiring em together, it should be sweet.. i have done 70mm to winch and earths and theres been no issues with startin and winching.. i lurves me twin battery set up..

as callum said, 70mm = gooderested.. new vs std..

[vinceparts]

One quick thread jacking question....... ln106 hilux..... Its single battery, if I mount another battery and run the positive and negative from the main battery to the secondary will that give me twice the amps required for a winch to be powered properly? Our will that screw all of my factory wiring up?

[chevrolux]

Your grounding strap is just as important as the positive. if you are going 70mm positive then you need 70mm to the body too.

[Shane]

One quick thread jacking question....... ln106 hilux..... Its single battery, if I mount another battery and run the positive and negative from the main battery to the secondary will that give me twice the amps required for a winch to be powered properly? Our will that screw all of my factory wiring up?

that well work fine,just need good size cable for that lenght.

[Mudhog]

Drivers side battery will have the winch 70mm negative cable to it.
Passenger side battery will have the positive solenoid 70mm cable to it and the starter motor 50mm cable.

Do you think this is Okay?

i cant comment on running different applications off seperate batteries but i was told by a sparky friend to just run everything off the one battery.. as long as you've done what you said with wiring em together, it should be sweet.. i have done 70mm to winch and earths and theres been no issues with startin and winching.. i lurves me twin battery set up..

as callum said, 70mm = gooderested.. new vs std..

Thanks Niblik

So you are running twin batteries in parallel and everything comes of one battery, is this correct?

Can you up load a pick of your trucks set up?

Cheers
Brett

[NJV6]

I have done exactly what you are talking about with no problems in the last 3 years.



Both earths run to chassis and you can see the jumper cable between two positives. the other black cable is the (one of them) negative from the winch.

[Mudhog]

I have done exactly what you are talking about with no problems in the last 3 years.



Both earths run to chassis and you can see the jumper cable between two positives. the other black cable is the (one of them) negative from the winch.

So you aren't running a cable from one negative to the other on the batteries, just earth cables to the body?

What size alternator are you running?

Cheers
Brett

[niblik]

So you are running twin batteries in parallel and everything comes of one battery, is this correct?

why yes, yes it is..

Can you up load a pick of your trucks set up?

sweet as, i'll sort a couple when in lit hours..

So you aren't running a cable from one negative to the other on the batteries, just earth cables to the body?

thats what i've done... effectively the same thing.. saves on 70mm cable!

What size alternator are you running?

stocko's...

[Mudhog]

Cheers for that niblik:D

I only have about 1200mm of 70mm cable left so that will work out much better at this point

Cheers
Brett

[NJV6]

I have a negative jumper cable - its called the chassis . Both -ve leads go to body and then onto chassis.

Alternator is stock mitsi but is prob pretty grunty and the thing is full of electronics. I figure I don't need a big alternator as I have much more 'power in the bank'!

[Mudhog]

I've just about got the wiring all finished and everything hooked back up, I'll try and upload some pic's tonight

Cheers for all the help and info Guy's

[loppee]

I am looking at doing twin batterys in my Zuk what brand of battery did ya use and how much?
Cheers Woody

[ice4x4]

I've just about got the wiring all finished and everything hooked back up, I'll try and upload some pic's tonight

Cheers for all the help and info Guy's

Looking forward to the pics Brett to see where you put the batteries as I'll be doing the same to mine soon hopefully..

[Mudhog]

Here goes with some pictures



Let's see if this works?

This is the second battery behind the passenger side headlight.
The Blue cable goes to the engine block and the 70mm orange cable with the black heat shrink goes to the body and the chassis. The other 70mm cable with the red heat shrink goes from the pos to the pos on the other battery.

I'll post some more pic's as this one has worked Okay
First time posting a pic that has worked:lol:

[Mudhog]

Here's a few more of the final set up



This is the main battery with the TG Thompson solenoid sitting behind on the inner guard.



Main battery with the 70mm cable coming across from the second battery. This battery has the cables going to the solenoid and the starter motor.



The solenoid and with the cables from the battery and the ones to the winch.

While I was making the cables up I replaced the starter motor feed cable with a nice new 50mm one.

Cheers Brett

[ice4x4]

Nice one Brett! Those 70mm wires look like they'll do the job .

In fact they could be related to me.... Fat Bastards

[Mudhog]

Thanks Ian

It makes the job take alittle longer when you're making up the cables as I needed to set each one up and mark the lugs in place to make sure the cables sat Okay because they have a mind of there own

I'm pretty stoked with the final result and will look at up grading a couple of the other cables aswell soon.

I rotated my winches gearbox the other day too, I've fitted the cable Free spool I designed to it so that I can now look at making up a front grill that will fit that doesn't need to much cut out of it



The Free spool works off a bike shifter from inside the cab and I've had the Clutch body I designed machined up for me by a friend. I've had it fitted to my Winch for the last 3 month's and had one small problem which I found from testing it. I've made the necessary change to fix it and all seems to be working Okay now.



Here you can see the Free Spool Rotated back .



This the the Gear Shifter I've been testing with the Free Spool

I have fitted one of the Free Spool's (Tiger Tamer)to a Comp Truck from Christchurch and he Won the Club Class at Wellwood late last year

It's been working really well and I will look at getting a few made up for the guy's with the Single High Speed winches I'm selling. It's a simple design that I hope will help to make it strong and last!!

I'm on patrol at Woodhill next weekend and will test the new battery set up out fully then

Cheers Brett

[kbjj]

Nice. I'm really keen to understand how this works. Looks tidy and simple in principle. My freespool requires 180 degree turn. Is yours different?