Outer Limits 4x4 Board

Hi

I am installing a second battery tray and intend to run the new and old battery as a 12v system without a solenoid. + to +.

The new battery is 700cca and the old battery is 500cca.

Currently the winch is on the + of the new battery.

To make the cabling easier would the winch lose power if it was running off the 500cca battery?

Because the 2 batteries are hooked up + to + would that mean the + on either battery would supply the same power?



In future i will get another battery the same as the new one.

Cheers
Eric

Providing your cabling between the batteries is thick enough it will make little to no difference.

excellent

I am using 2 gauge cable, the same size that came with the winch.

I am using 2 gauge cable, the same size that came with the winch.

Also depends on the distance from the battery to the winch - voltage drop

Best consult an auto elec. who does winch wiring

most winch manufacturers recommend a minimum of 650 cca

sudso wrote:most winch manufacturers recommend a minimum of 650 cca

700 + 500 = 1200cca, i dont think there is a problem there, with batteries linked like that, as long as the cabling is up to it, will act like 1 bigger battery, might be time to upgrade the wire from the alternator to the battery as well.

marin

marin wrote:

sudso wrote:most winch manufacturers recommend a minimum of 650 cca

700 + 500 = 1200cca, i dont think there is a problem there, with batteries linked like that, as long as the cabling is up to it, will act like 1 bigger battery, might be time to upgrade the wire from the alternator to the battery as well.

marin

I did look at the wire from the alt but it looked like a shyt job to do.

EricB wrote:

marin wrote:

sudso wrote:most winch manufacturers recommend a minimum of 650 cca

700 + 500 = 1200cca, i dont think there is a problem there, with batteries linked like that, as long as the cabling is up to it, will act like 1 bigger battery, might be time to upgrade the wire from the alternator to the battery as well.

marin

I did look at the wire from the alt but it looked like a shyt job to do.

Nah, should be easy. You only have to do the main "heavy" wire.

Jason

chimpboy wrote:

EricB wrote:

marin wrote:

sudso wrote:most winch manufacturers recommend a minimum of 650 cca

700 + 500 = 1200cca, i dont think there is a problem there, with batteries linked like that, as long as the cabling is up to it, will act like 1 bigger battery, might be time to upgrade the wire from the alternator to the battery as well.

marin

I did look at the wire from the alt but it looked like a shyt job to do.

Nah, should be easy. You only have to do the main "heavy" wire.

Jason

Problem is I dont have a crimping tool, for the 2Gauge cable im using big arse 2gauge plugs with alan key screw holding the cable in.

Some of the other terminators ive found that you clamp on your self seem really poor.

chimpboy wrote:Nah, should be easy. You only have to do the main "heavy" wire.

Jason

I thought the same thing when I upgraded the alternator-> battery cable on my Feroza..... boy was I wrong!

The cable was in a loom with other wires, so I decided to leave the loom alone and just run a thick cable externally by itself (a lot easier than trying to disect one wire from the loom - being an EFI vehicle and all.) After running the new cable various electrical circuits had lost power. It turns out the original cable was spliced somewhere inside the loom and branched off to supply these circuits!!!

Be careful if doing such a mod.

And the new battery cant be damaged by linking it to an older one?

[quote="murcod]
The cable was in a loom with other wires, so I decided to leave the loom alone and just run a thick cable externally by itself (a lot easier than trying to disect one wire from the loom - being an EFI vehicle and all.) After running the new cable various electrical circuits had lost power. It turns out the original cable was spliced somewhere inside the loom and branched off to supply these circuits!!!

Be careful if doing such a mod. [/quote]

Was this due to an external regulator for the alternator?

murcod wrote:

chimpboy wrote:Nah, should be easy. You only have to do the main "heavy" wire.

Jason

I thought the same thing when I upgraded the alternator-> battery cable on my Feroza..... boy was I wrong!

The cable was in a loom with other wires, so I decided to leave the loom alone and just run a thick cable externally by itself (a lot easier than trying to disect one wire from the loom - being an EFI vehicle and all.) After running the new cable various electrical circuits had lost power. It turns out the original cable was spliced somewhere inside the loom and branched off to supply these circuits!!!

Be careful if doing such a mod.

Why not just leave the old cable in the circuit while supplementing it with the new larger one?

I've run a larger cable (400 amp welding flex) straight from the alternator positive to the battery positive.
Also used the same cable and upgraded most of my earth cables.

marin

I'll try and answer all the above!

1. External regulator- no, an internal IC regulator.

2. I didn't leave the old cable (and run the new one in parallel) because I wanted to use the fusible link in it for the new heavy duty cable. It's very important to make sure that cable is fused!!!

3. I fixed it by joining the two cables together after the fusible link.

4. It is a bad idea to join two disimilar batteries together. Ideally they should both be bought at the same time and be exactly the same battery.

murcod wrote:I'll try and answer all the above!

4. It is a bad idea to join two disimilar batteries together. Ideally they should both be bought at the same time and be exactly the same battery.

What does it do? Kill the new battery?

It can cause charging problems (ie. one may be overcharged/ the other under charged) due to them having to sit at the same voltage.

Also, if the voltages they naturally sit at with the ignition off are different the higher voltage battery will partially discharge into the lower one. If you buy two new batteries that are exactly the same you limit the chances of these things happening.

Basically it will make the new battery's life shorter.

Drivesafe (if he's around?) can elaborate and possbily explain it better than me.

Cool thanks, I will update the old battery soon then

Problem fixed. Just bought another Overlander 700cca

Does anyone put a heat shield on the 2nd Bat. It seems to get quite hot from the extractors.