How to connect 4 12V batteries to make 24V?

One 12-volt battery can’t be used to make a 24-volt battery. To make a 24-volt battery, you need two 12-volt batteries.

Some people put two batteries in a row, while others put them next to each other. If you put two batteries in series in the circuit, the voltage will be doubled, so it doesn’t matter which way you connect the wires. The best thing to do is connect two batteries in series and put them both on a flat surface so they don’t move around when you drive your car.

So, how do you hook up two 12-volt batteries to make 24 volts? More than one battery is the same. If you connect the batteries in series, they will have 24 volts, but it won’t matter how long you give your car to charge. No matter what voltage you use, the amps stay the same.

You need two 12-volt batteries to make a 24-volt one. If you follow these rules, it’s not too hard to do:

Do Two 12v Batteries Make 24v?

Yes, 24v can be made from two 12v batteries. You can connect batteries in two ways. When two batteries are connected in series, their voltages are added together. In a parallel connection, the amperage is added up, but the voltage stays the same.

So if you tried to power a 24v device using a parallel connection of 12v batteries, the battery would not be able to provide enough amps to run that device at full strength. Yes, the voltage would be 24 if you connected two 12V batteries in series.

In some situations, you might need more than 12 volts from a device that runs on 24 volts. Yes, the voltage would be 48V if you connected two 24V batteries in series.

Do Two 12v Batteries Make 24v?

How To Connect 2 12v Batteries To Make A 24v Diagram?

How to Use Two 12V Batteries to Make 24V?

Step 1: Join the wire to the positive (+) end of one of the batteries.

Step 2: Connect the other end of the cable to the second battery’s negative (-) terminal. You now have two terminals that are not in use. One is the negative (-) end of the first battery, and the other is the positive (+) end of the second battery.

Step 3: Now you need to connect the unconnected terminal, connect the first battery’s negative (-) terminal with a connector, and connect the second battery’s positive (+) terminal with another connector. They shouldn’t touch each other. Now there are 24 volts.

Step 4: After the third step, you should have two ends: (+) and (-).

Connect the cable’s negative (-) end to the power unit’s negative terminal. When you are ready for it to work, connect the rest of the line to the (+) terminal on your power unit. Now, the batteries will give you 24 volts, which means you can use your 24-volt power unit.

How to Use Two 12V Batteries to Make 24V?

How to connect 4 12V batteries to make 24V?

How to connect 4 12V batteries to make 24V

It’s a hybrid of series and parallels, that’s what it is.

You will obtain 24 volts if you connect two batteries to one another in a series connection.

Proceed with the remaining two by repeating steps 1 and 2.

You now have two batteries that are able to provide a total of 24 volts. The following information is something that I DO NOT RECOMMEND, so please disregard it. Make sure that the two 24 V batteries are connected together in parallel. At the end of this process, you will have a battery that operates at 24 V.

They have the propensity to reduce each other’s speed and efficiency when connected in parallel, which is why we do not advise doing so because it is not in anyone’s best interest.

Keeping it as two 24V batteries is in everyone’s best interest, so that’s what we’ll do.

See full this video: How to wire batteries in Parallel & in Series COMBO 4 12v 35AH AGM Batteries wired to get 24v 70AH


What are some ways in which a 24V (dual-battery) battery supply could be used?

The 24V battery is great for many different industries, such as construction, mining, and manufacturing. Most of the time, these industries need a lot of power that can’t be met by a single 12-volt or 24-volt battery.

A dual-battery system has more power than a single 12-volt or 24-volt battery, and if one of the batteries fails, the other one will still work. This means that even if one of the batteries goes bad, your equipment will still work. Here, I’ll show you what kinds of devices can be powered by 24V DC.

  • Ballast for Racecars

Ballast for cars can come from two batteries. This is very important in classes where you can’t add weight because of the rules.

  • Car for the drag strip only without an alternator

Let’s say you’re driving a car without an alternator that only uses the battery to start. In that case, you can use one battery to power the ignition system and the other to power everything else.

Car for the drag strip only without an alternator

  • Luxury cars. They’ve got really cool sound systems

Some cars can play music. If the car has loudspeakers that play music, you might need a battery for this. This is a “supplementary” battery. Normal things in the car, like turning on the lights and starting the car when you press the “start” button, are powered by the regular battery. When you turn off your car’s engine, your extra battery will power your sound system so it won’t turn off at night when all of its speakers are playing.

  • Hard cranking with a lot of advances and high compression

You can get more cold-cranking amps by putting batteries in parallel to make 12 volts, but you should check a few other things first. Make sure the voltage isn’t too high and that your battery isn’t too weak.

  • Most Powerful Start

You might not be able to start your car when you need to. So you’ll have to get new batteries. But sometimes, your car won’t work even with two new batteries. When that happens, connect the battery terminal of one battery to the battery terminal of the other battery. Then, it will have more power and your car will start up again. But this only works if your car needs a lot of power to start. If it doesn’t, it won’t work.

  • Full-Time 24volts

Jets can use the 24-volt system. It could be bad for cars. If you use 24 volts, some parts of the car will break. Worse, you can’t get replacement parts for the car because they only come in 12 volts. If you want to use this system, connect two 12-volt batteries together and put them in your car to make up the other 12 volts.

  • A Dual 12/24-Volt System

A series/parallel distribution circuit that sends 24 volts when the ignition is turned on can be made with a 24-volt continuous-duty solenoid. So, you’ll have power for the car’s starter. When the car is running, the solenoid goes back to 12 volts. This means that everything else in your car, like the lights and wipers, has power.


If you want to raise the voltage of your electrical system, you need to know how it works. Adding two 12-volt batteries in series would be the easiest way to do this. This will make 24 volts without making the current flow much faster. Also, it’s important to know that if one battery fails or dies, the other will still work on its own and won’t need to be replaced because of an imbalance in power needs.

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