Cruisers Forum

Join CruisersForum Today

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 26-12-2018, 11:20   #1
Registered User

Join Date: Oct 2014
Location: Panama City Beach, FL
Boat: Beneteau 343
Posts: 290
Jumper cable size for 6 volt batts in series

When I bought my 4 golf cart batts from the Interstate store I also bought 2 jumpers to wire each pair in series for my 12v system. The jumpers were supposedly designed for my exact purpose and the Interstate guy seemed credible. Four years later, a buddy recently commented to me that the jumpers needed to be same size as the positive and negative cables that run to my house switch. The in-series jumpers are no where near as fat as my + and - cables but they are substantial (guessing 2 AWG). Is my buddy correct?
EmeraldCoastSailor is online now   Reply With Quote
Old 26-12-2018, 11:49   #2
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 5,486
Re: Jumper cable size for 6 volt batts in series

I also use #2 for jumpers / interconnects and it's fine. The thing your friend forgets is each two 6v batteries act as one 12v and having four means 1/2 the load is carried by each set of 2.

Your Friend would be correct if this was a 24V bank. Then all conductors should be the same.

I use my house bank to start my yanmar and the #2's work fine. For most house loads #2 is very oversized for the interconnects.

It's more important that the conductor lengths are the same length so that the current flow is balanced between the two sets of two. Of course having interconnects the same size as the main + and - works well too. But for the typical <40' boat #2 jumpers on 6v works well.
sailorchic34 is offline   Reply With Quote
Old 30-12-2018, 11:39   #3
Registered User

Join Date: Jun 2013
Location: canada
Posts: 2,710
Re: Jumper cable size for 6 volt batts in series

if you have 4 gc in series / parallel. the series jumpers are taking 1/2 the current. (because each pair of batteries is providing half the power)

the parrellel ones are also each taking half the total current.

this changes depending on how many batteries are used, and how they are wired. so there is defiannlty no rule on this. on bigger banks each jumper will be carrying different amounts then other jumpers in the same bank.
smac999 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Combining 6 volt in series into parallel with 12 volt zboss Electrical: Batteries, Generators & Solar 13 12-05-2018 13:16
Jumper between batteries 1 & 2? apacit Electrical: Batteries, Generators & Solar 8 23-02-2015 10:27
Clarifying AC Safety / DC Ground Jumper US1Fountain Electrical: Batteries, Generators & Solar 11 08-02-2011 20:15
Run 2 12v Batts in Series Instead of 4 6v? jeffe Construction, Maintenance & Refit 6 11-07-2009 06:10
6 volt vs 12 volt? mestrezat Electrical: Batteries, Generators & Solar 39 18-02-2009 00:33

Advertise Here

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:17.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.