Hi all, I've got a 30' Itasca Class A. It comes with (2) new 12 volt deep cycle batteries located under the doorway steps. I've build a new battery compartment which will hold (2) more batteries however it is located 6' from the existing batteries. I'll be getting rid of the 12 volt batteries and will install and marry (4) 6 volt deep cycle batteries. What is the best size welding cable to run for that 6' distance between the two separate battery compartments?Thanks in advance!

I used 1/0 welding cable for a 6' run from one bank to the distribution buses. This was for one pair of 6V GC2 batteries. I based the wire gauge on anticipated amperage draw of a 1000W inverter.

It's actually 12' by the time you make the full run. Personally I would run 4/0 to keep the balance of the batteries as close as possible, otherwise your remote stack will never charge to the same level as the ORM location, nor will it share the same discharge load as the OEM. The only way to fix that is reduce the line loss between the two locations, especially since these are all new batteries.But that's just me..

I just installed a four battery bank (500 AH) feeding a 1000W inverter and a 100A charger using 4 gauge cables. Like you two were 6' apart and I used the frame and a 2 gauge 6' cable between the two sets of batteries. This is not a starter system where you need 1000+ amps... just 100 or less. You can balance the hookup by taking off from opposite ends of the two batteries with the + and - cables and SCV... 4/0 for 6' of 100 amps ???:S

Yep.. Buy the best and cry only once

Ivylog wrote:I just installed a four battery bank (500 AH) feeding a 1000W inverter and a 100A charger using 4 gauge cables. Was that 4 gauge or 4/0 gauge. Big difference!

Adding More Batteries to My Class A - What gauge Wire?

45 Replies

wolfe10
Explorer
Jun 22, 2015
Ivylog wrote:
I just installed a four battery bank (500 AH) feeding a 1000W inverter and a 100A charger using 4 gauge cables.

Was that 4 gauge or 4/0 gauge. Big difference!
SCVJeff
Explorer
Jun 22, 2015
Yep.. Buy the best and cry only once
Ivylog
Explorer III
Jun 22, 2015
I just installed a four battery bank (500 AH) feeding a 1000W inverter and a 100A charger using 4 gauge cables. Like you two were 6' apart and I used the frame and a 2 gauge 6' cable between the two sets of batteries. This is not a starter system where you need 1000+ amps... just 100 or less. You can balance the hookup by taking off from opposite ends of the two batteries with the + and - cables and SCV... 4/0 for 6' of 100 amps ???:S
SCVJeff
Explorer
Jun 22, 2015
It's actually 12' by the time you make the full run. Personally I would run 4/0 to keep the balance of the batteries as close as possible, otherwise your remote stack will never charge to the same level as the ORM location, nor will it share the same discharge load as the OEM. The only way to fix that is reduce the line loss between the two locations, especially since these are all new batteries.
But that's just me..
westend
Explorer
Jun 22, 2015
I used 1/0 welding cable for a 6' run from one bank to the distribution buses. This was for one pair of 6V GC2 batteries. I based the wire gauge on anticipated amperage draw of a 1000W inverter.

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Adding More Batteries to My Class A - What gauge Wire?

45 Replies

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