swimmer_spe
Sudbury, Ontario, Canada
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Joined: 08/14/2013
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I have space for 2 batteries where I currently have one. The one I will be adding is identical, except it is about a year older. Am I right, I need to daisy chain them?
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Dutch_12078
Winters south, summers north
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No... Two 12-volt batteries must be connected in parallel to still supply 12 volts, but at twice the amp/hours. "Daisy chained" would supply 24 volts, possibly burning out most of your 12 volt devices.
Dutch
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agesilaus
North Florida
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Battery wiring
Arctic Fox 25Y Travel Trailer
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Grit dog
Black Diamond, WA
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Dutch_12078 wrote:No... Two 12-volt batteries must be connected in parallel to still supply 12 volts, but at twice the amp/hours. "Daisy chained" would supply 24 volts, possibly burning out most of your 12 volt devices.
Well in electrical terminology for daisy chain in residential IS parallel connections.
But potato pototo.
Yes parallel them. Not series.
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bob213
Fresno, CA
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Not sure about pairing batteries of different age but here's a great guide on how to do it correctly...12v side of life
12v
You can avoid reality, but you cannot avoid the consequences of avoiding reality – Ayn Rand
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wa8yxm
Davison Michigan (East of Flint)
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There are a lot of myths about paralleling batteries.
For the most part the only thing you need to concern
The Connecting cables need to be large enough (Same as the cable that runs off to who knows where)
And the polarity.
Most everythign else the batteries will work out by themselves
In some very high current installs there is more (Load Balance) But you are into the hundreds of amp loads before that's a concern.
With GC-2's there are additional concerns but since you are not going that route. That is all folks.
Home was where I park it. but alas the.
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Bobbo
Wherever I park
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Hook the two POSITIVE terminals together. Hook the two NEGATIVE terminals together. For best results, hook the trailer's POSITIVE cable to the POSITIVE terminal of one of the batteries, and the trailer's NEGATIVE cable to the NEGATIVE terminal of the other battery.
Bobbo and Lin
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Grit dog
Black Diamond, WA
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Bobbo wrote:Hook the two POSITIVE terminals together. Hook the two NEGATIVE terminals together. For best results, hook the trailer's POSITIVE cable to the POSITIVE terminal of one of the batteries, and the trailer's NEGATIVE cable to the NEGATIVE terminal of the other battery.
THANK you. Lol
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Grit dog
Black Diamond, WA
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wa8yxm wrote:There are a lot of myths about paralleling batteries.
For the most part the only thing you need to concern
The Connecting cables need to be large enough (Same as the cable that runs off to who knows where)
And the polarity.
Most everythign else the batteries will work out by themselves
In some very high current installs there is more (Load Balance) But you are into the hundreds of amp loads before that's a concern.
With GC-2's there are additional concerns but since you are not going that route. That is all folks.
Not sure of the myths…but for sure there are some guidelines.
Wondering what the addl concerns might be with 6V batteries though? You said there are concerns?
Aside from having to hook up in series or series-parallel I’m not aware of any “concerns.”
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pianotuna
Regina, SK, Canada
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swimmer_spe
This is what is balanced and best for twin twelve volt batteries.
![[image]](http://www.rubyorchid.com/RV/images/Pianotuna12V.png)
As it often doesn't cost a dime more to do this, I think it is worth the trouble.
If you wish to understand the "why" surf here:
correctly interconnecting multiple twelve volt batteries
Others may say it doesn't matter--but unless there is a compelling reason to not optimize charging and discharging why not do it the best possible way?
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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