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How to Wire Two 6-Volt Batteries In Series to Double Output Voltage


I need a wiring diagram for wiring 2-6v batteries to produce 12v


Expert Reply:

To wire two 6-volt batteries in series to produce 12-volts, you would connect the load to the positive terminal of battery # 1. Connect the negative terminal of battery # 1 to the positive terminal of battery # 2. Ground the negative terminal of battery # 2.

I have produced a diagram showing the connections for you.

click to enlarge
expert reply by:
Mike L

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Follow up Questions

Thanks Mike L the wire diagram made it super easy and I was on my way.
Cam P.
How can I add an Isolator to 2 6V Batteries that are wired in Series. I need to be able to charge them while driving. Thanks
Etrailer Expert
Reply from Chris R.

I linked an answer page below that does a really nice job of explaining how this is done.

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