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Old 10-07-2009, 12:15   #1
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Run 2 12v Batts in Series Instead of 4 6v?

We have four trojan 104 mileage master batteries that are ran in a series to power our 24 volt system. Why could i not run two 12 volt in series for same effect?

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Old 10-07-2009, 12:34   #2
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Absolutely Yes
A 6 volt battery is just 3 2 Volt batteries hidding in one case. A 12 volt battery is just 2 6 Volt (really 3 2 volt batteries) combined in one case.

As long as they are the same group size, preferably same manufacturer and age you can string them together.

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Old 10-07-2009, 16:14   #3
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Trojan sells 12V too! No issues.
Cam - I am no longer a member here. Look for me on other forums...same name.

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Old 10-07-2009, 18:36   #4
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Remember that AH capacity is not additive. If you have 4 - 200 AH 6V batteries in series you have 200 AH at 24 volts. If you go to 2 12 volt batteries in series you will have 24 volts also but the capacity will be whatever the 12 v have individually. They may not have 200 AH each.

Cruisers usually prefer to use the 6 Volt Deep cycle batteries because they are more available (Golf Carts) the world over, and they are smaller and easier to handle than equivalent 12 V batteries.

You can get 12 v starting batteries the world over but they are usually starting batteries. I would think twice before making the switch.

Good Luck

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Old 10-07-2009, 19:54   #5
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no problem, we have that setup on our HR.
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Old 11-07-2009, 04:09   #6
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Battery Banks (series, parallel, or series/parallel) should always be configured so that Load Distribution Cables are connected to different batteries at opposite ends of the combined bank.

When connecting the batteries in parallel, the positive poles are connected to each other, as are the negative poles. The voltage does not change and the capacity (Ah) will be the sum of the connected batteries.

When connecting the batteries in series, the positive pole of one battery is connected to the negative pole of another battery. The voltage will be the sum of the connected batteries voltage and the capacity (Ah) will remain the same.

In the Parallel-Series connection, both types of connections are used. The parallel connection will raise the capacity (Ah) while the series connection will raise the voltage.

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Old 11-07-2009, 05:10   #7
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Originally Posted by camaraderie View Post
Trojan sells 12V too! No issues.
Trojan sells batteries? I thought they sold, ugh, ugh...never mind.

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