Well, I flunked the Smarty Pants thread...........so I probably will expose more ignorance here.......
But, other than the pictures and the batteries are turned 90 degrees from each other, what is the difference? Both are wired in parallel. The only true difference I see is that in #1 the neg goes to neg on the source, and in #2, the neg goes to a ground.
?????
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"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
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2016 GMC Denali 3500Dually--2017 CC 36CKTS
Honestly, you shouldn't see any difference at all. You're not really "pulling" through one battery into another as you would with a series connection. You're just tying posts together and drawing from both at the same time. One battery may be slightly less efficient, but that will be due to the resistance in the wire between the two, which will be negligible.
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2015 Chevy Silverado LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
Well, I flunked the Smarty Pants thread...........so I probably will expose more ignorance here.......
But, other than the pictures and the batteries are turned 90 degrees from each other, what is the difference? Both are wired in parallel. The only true difference I see is that in #1 the neg goes to neg on the source, and in #2, the neg goes to a ground.
?????
I had to look twice. The only difference is whether the wires are connected to the same battery or pos to one battery and neg to the other. Before I went to 6V, I tied my 12's together pos on one, neg on the other...mainly because that's what matched up to my cable lengths the easiest. Out of habit, I charge mine like that. I really don't think it makes much difference unless we're talking a LARGE battery bank. In that case, in would probably be best to wire them on opposite corners.
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2015 Chevy Silverado LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
But again.........I flunked the Smarty Pants thread........so......................
__________________
"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
FROG AR-0019-242
2016 GMC Denali 3500Dually--2017 CC 36CKTS
Thanks for the answers. The two sets of batteries were/are matched pairs. Fancy is interesting but I was just interested to know if one way is better than the other. It seems from the responses that there is no better one way or the other. The batteries are in parallel and that is what matters.
Thanks all
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2016 Sunseeker 3010ds towing a 2013 Ford Explorer 3.5L AWD.
. Fancy is interesting but I was just interested to know if one way is better than the other. It seems from the responses that there is no better one way or the other. The batteries are in parallel and that is what matters.
Thanks all
Well, technically one way is better than the other.
Will you ever notice? Nope.
ELectrically, they are identical, no difference in current or draw. Whichever is easier to wire for your rig. Batteries should be same age and amperage, as stated above.
Electrically, the two hookup schemes appear identical but aren't. The difference is the resistance of the wires connecting the two batteries together in your first hookup picture. When supplying current to loads, the battery furthest away from the load wires will supply less of the current than the one nearer to the load wires. The same logic applies to charging with the batteries closest to the load wires getting charged first.
The larger the wires between the batteries, the smaller this effect will be. The smaller the load or charging current on the batteries, the smaller the effect will be. If the load wires are hooked up as shown in your second picture, the cable lengths to both batteries will be equal and the batteries will always be drawn on and charged equally.
The only thing in an RV that would make the battery hookup configuration critical is an inverter. Newer RVs with a residential fridge will have one of these which will place a large enough draw on the batteries to make having the optimum hookup a more important factor for full battery life.
As an FYI, my knowledge in this area comes from research and installation of a 10KW battery bank to run an off-grid solar/wind powered observatory.
Honestly, you shouldn't see any difference at all. You're not really "pulling" through one battery into another as you would with a series connection. You're just tying posts together and drawing from both at the same time. One battery may be slightly less efficient, but that will be due to the resistance in the wire between the two, which will be negligible.
Bingo!
If all wires are of similar gauge and length, in a TWO battery, parallel set-up, you will see a negligible difference between the two proposed connections. This is of course, dependent on the two batteries sitting next to each other. If one is at one end of the rig and one at the other... all bets are off on either one of the connections.
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