Rlgabriel Report post Posted March 28 Wanting to see what AWG cable size is recommended when adding additional 6 volt batteries to an existing battery set. Currently have two 6 volt 210ah batteries that need replacing and I want to add two more. I fully understand the series/parallel wiring arrangement needed for the four batteries, but have no clear idea whether to go with 2 AWG, 4 AWG other sized cables for the new connections involved. What’s the best selection? Share this post Link to post Share on other sites
campcop Report post Posted March 28 Personally, I’d go with 2 AWG. Share this post Link to post Share on other sites
five Report post Posted March 29 Go to a ''real'' battery shop and ask them. I got my last house and starter batteries at Interstate. The house batteries have a three year full replacement warranty. Share this post Link to post Share on other sites
sfroese Report post Posted April 2 It depends how many amps you are pulling out and putting in during charging. If you have a trailer, 2 or 4 is sufficient, but if you have a motorhome with a large alternator and/or inverter/charger, you might consider as large as 1/0. In the case of a motorhome, I definitely wouldn't go smaller than 2, but you may notice the cabling from the chassis and inverter may be as large as 1/0. Share this post Link to post Share on other sites
wildebill308 Report post Posted April 5 On 3/28/2024 at 11:00 AM, Rlgabriel said: Wanting to see what AWG cable size is recommended when adding additional 6 volt batteries to an existing battery set. Currently have two 6 volt 210ah batteries that need replacing and I want to add two more. I fully understand the series/parallel wiring arrangement needed for the four batteries, but have no clear idea whether to go with 2 AWG, 4 AWG other sized cables for the new connections involved. What’s the best selection? I would use the same as what is in there now. Bill Share this post Link to post Share on other sites
Rlgabriel Report post Posted April 9 I went with 2 gauge cable after finding a cable sizing guide chart and verifying the maximum amperage of my system. The cables were ordered from BatteryCablesUSA.com . They make “golf cart cables” which have 5/16 holes in the lugs for the 6 volt batteries instead of the 3/8 hole typically found. Got the cables fabricated to the length I selected within the week. I also ordered rubber boots, mostly to put on the parallel cables where one end is on positive post (red) and other on negative (black). I’ll need to post a picture when all installed. Share this post Link to post Share on other sites
