Re: single or dual batteries

Posted by Jon Hagen on August 08, 2005 at 09:19:38 from (69.26.16.95):

In Reply to: single or dual batteries posted by Shadow on August 08, 2005 at 05:49:56:

The best starting/cranking set up I have ever had is on my old Steiger tractors with big 611(L10) and 855 cubic inch Cummins diesels. These tractors use 3 studbolt terminal batteries in parallel with all three batteries connected with short jumper cables. in addition,there are two positive and two negative cables from batteries 1 and 3 connected directly to the starter,so each set of cables/studs/terminals, only has to carry half the starter amp draw,and with ground cables connected directly to the starter,there is no ground current loss through rusty joints and connections.
It's a little more involved,but sure has been reliable over the last 18 years. Two 12V in parallel,with a seperate ground and hot cable for each bat,and grounded directly to the starter mounting bolts,should do very well.

Too many cable joints in a series setup( 2- 6v bats in series)can lose more power than a parallel 12v hookup. My old IH semi tractor with 8v-92 Detroit, originally had 4-6V batteries wired in a combination series/parallel setup to give 12v. It was a constant battle to keep all the cables clean and tight. The last time I changed the batteries,I replaced the 4-6v batts with 2-12v 900CCA in parallel. Cable maintenence has gone almost to 0 and it cranks better than the 4-6V setup ever did.

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