How To Connect 4 12V Batteries To Make 24V?

Key Points:

  • To connect 4 12V batteries to make 24V, you need to connect them in a series-parallel connection.
  • Connect two groups of the batteries in parallel at first. Then connect both the groups with each other in the series connection.

Many times, we require to connect two or multiple batteries either in series or in parallel to undergo a single application. It either enhances the overall efficiency or the capacity of the batteries.

Sometimes, you may have to connect batteries in both series and parallel in the same circuit. For example, you have four 12V batteries and you want to make them a 24-volt battery bank. But, how to do it?

To make a 24-volt battery from four 12V batteries, you need to make two groups of batteries at first. Each group consists of two 12 volts of batteries connected in parallel. Finally, connect the groups in series to make a 24-volt battery bank to serve your need.

If you’re interested to know how to connect 4 12V batteries to make 24V, this article is for you. So, without further ado, let’s start with it!

Before starting with the process directly, let us know how these types of connections work at first.

What Is Series Connection?

Well, a series connection is put to increase the overall output of the system. When you connect two or multiple batteries in series, the output of the system will be the summation of the individual outputs of the batteries that are connected within the series connection. Nevertheless, a series connection doesn’t extend the runtime of the batteries.

To make a series connection, you need to connect the positive terminal of the first battery to the negative terminal of the second battery. The remaining open terminals are connected to a load to complete the circuit.

For example, if you connect two 8 volts 500A/H batteries in series, the resultant system will give an output of 16 volts, while keeping the capacity the same.

Figure: Two 8-volt batteries connected in series

It is crucial to keep in mind that you should always use a charger that complements the overall output of the system.

What Is Parallel Connection?

A parallel connection is made to increase the capacity overall rather than its output. The capacity of the system will be the total capacity of the individual batteries that are connected to it. However, the voltage remains the same.

To make a parallel connection, you need to connect the positive terminal of the first battery to the positive terminal of the other battery. In the same way, you have to connect the negative terminals of both the batteries together. Finally, connect the opposite ends to the load to complete a circuit.

For example, if you connect two 8 volts 250 A/H batteries in parallel, the resultant system will provide 500 A/H of capacity, while keeping the voltage the same which is 8 volts.

Figure: Two 8-volt batteries connected in parallel

Connecting 4 12V Batteries to Make 24V

Now it is time to discuss in brief how to connect 4 12V batteries to make 24V. You need both a parallel connection and a series connection to get a 24-volt battery bank from four 12 volts batteries.

Things You Need

  • Four 12-volt batteries
  • Jumping cables
  • Pliers (optional)

Steps to Follow

Once you have all the required equipment, you can start with the process. At first, make two groups of batteries where each group consists of two batteries.

The 12-volt batteries within a group should be connected in parallel. That means the positive of the (A) battery connects to the Positive of the (C) battery. Also, the negative terminals of the other group of batteries (B & D) are connected together.

Then, connect the two groups in series. The negative point of the (A) battery should connect to the positive terminal of the (B) battery. Again, the negative of the (C) battery should connect to the positive of the (D) battery.

Figure: Four 12V batteries are connected in series-parallel to make 24V

Remember to connect batteries of equal voltage before connecting them in parallel. Otherwise, a high current flows to balance the voltages which are only restricted by the internal resistance of the batteries and the connecting cables.

Also, while connecting never cross the positive and negative terminals with each other that may cause severe damage or injury.

Well, if you connect the four 12V batteries in series, you will get 48V output in return. Follow how to connect 4 12V batteries to make 48V to see more.

Frequently Asked Questions (FAQs):

Is it better to connect batteries in series or parallel?

A series connection will increase the overall voltage of the system while connecting batteries in parallel resulting in increasing the capacity. The voltage doesn’t change in the parallel connection. So, both the series and the parallel connection are used for different applications. If you can do it properly, there will be no chance of damage or injury.

Is It Possible To Extend The Runtime Of The Batteries?

Yes, it is possible to extend the runtime of the batteries by simply connecting them in parallel. As a parallel connection offers an increase in the overall capacity, while keeping the voltage the same, the output will run longer. You may see how to connect batteries in parallel to extend runtime to get to know in detail.

How Do I Get 24 Volts Out Of 2 12 Volt Batteries?

As we know connecting batteries in series increases the overall output voltage. So, to get 24 volts out of two 12 volt batteries, you must connect them in series. Make sure to connect batteries of the same amount of charge which otherwise, end up changing each other.

Final Word

So, now you know how to connect 4 12v batteries to make 24v, isn’t it?

If you follow the instructions properly you should have no trouble completing the circuit. Never use the batteries of different configurations and also don’t get confused with the positive and the negative terminals. They come in red and black colors respectively.

I hope you find the article helpful. If so, don’t forget to share it with your friends.

Thank you.

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