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How to Wire 24 Volts With Two Batteries

In order to wire 24-volts with two batteries and gain optimum power, a serial connection should be used. Batteries arraigned in series are quite common. A tube flashlight that holds four batteries is a serial connection when all the batteries are inserted into the tube with the nub, or positive terminal up. Four 1.5-volt batteries in a serial connection will yield six volts. In order to yield 24-volts from a two-battery connection, two 12-volt batteries are needed. This connection is popular in large trucks, construction equipment and some recreational vehicles.

Instructions

1

Place two 12-volt automotive batteries in a battery hold-down box or on a rigid shelf. The batteries should be positioned next to each other so that the positive post of one battery is nearest to the negative post of the other one.

2

Secure the batteries to the battery box or shelf. If no tie-down apparatus is available, a suitable system to secure the two 12-volt batteries to the battery box or shelf is to place a small ratcheting load binder over top of the two batteries and attach the two binder ends to the battery shelf or battery box, one on each side of the batteries.

3

Join the positive battery post from one 12-volt battery to the negative post of the other 12-volt battery using a battery cable equipped with a positive terminal on one end and a negative terminal on the other end.

4

Connect the two unconnected battery posts, one from each battery to any device as needed. Remember that these two batteries are now joined in a series and yield 24 volts at the two unconnected posts. Adhere to the polarity of the now 24-volt series by connecting the open positive post to the positive and the open negative post to the negative terminal of the device to be powered.