How to Charge 24V Battery With 12V Charger – Easy Solution!

As a reader, you might be wondering how to charge a 24V battery with a 12V charger. Well here’s the answer. 

First of all, it is important that your power source is 24V and has enough amps to handle the task at hand. For example, if you are using a converter or an inverter for your power source, make sure it can output 50 amps or more. 

Next, you will need a DC-to-DC step-down converter to connect from the high voltage input (24 volts) to low voltage output (12 volts).

You’ll want one with over 100A capacity and cooling fans in case they get too hot when charging batteries. Lastly, before hooking up your charger cables do not forget to install them.

For the two different types of batteries to be compatible (24v and 12v), they need something called an inverter. The inverter takes your ordinary household power supply- 110 volts or 220 volts -and converts this voltage into one that is suitable for charging up those high voltage cells.

This conversion process can take place in either direction, meaning if there was no way around it some people might have done just what we did: hooking their twelve-volt charger onto a twenty-four-volt system by using another converter which will change out all of our DC Current from 12 volts AC into 48 alternating cycles per second at 240.

In this blog post, we’ll be discussing how to charge a 24V battery with a 12V charger. Now it may seem like there is no way to do this, but that’s not the case. There are actually ways to do this and in fact, many people do it without knowing. 

We’re going to discuss what you need to know about charging 24V batteries with a 12V charger so that you can make an informed decision on whether or not you want to try it out for yourself.

Remember: always consult your manual before doing any of these things.

How to charge 24V battery with 12V charger – Step By Step Guide

24V battery charging will be made easy by using a 12V charger. By just following the steps given below, you can easily charge your 24V batteries with the help of a DC transformer.

Here are few tips for charging your24V battery with a 12V charger:

  • Firstly, check the voltage specification of both devices (12V & 24V) to make sure these are compatible with each other.
  • Then connect the negative and positive lead of AC/DC power to the device’s output port respectively and connect these leads with each battery terminal.
  • Finally, check the voltage regulator on both systems if it is set in 12V or higher, and fix it down by turning the knob counter-clockwise until 11.5v or lower shows up on the digital screen.
  • At last plug out the charger from the AC socket and wait for 5 minutes and then start charging.
  • Observe the digital screen on both systems while you are connecting radian to its terminal, soon it will show up at 12V or higher voltage on the screen.
  • To avoid any damage from the sudden change of voltage, firstly press the “On/off” button (if available) for a moment so that the internal circuit can get relaxed & then connect the battery to its output port.
  • Keep off all other DC loads during the process of 24v battery charging.
  • Charging a 24V battery up to 28.4 volts is fine, charging it past that point, will most likely result in the pack being damaged beyond repair. We do NOT recommend you charge them above 30v if you plan to use them for anything other than testing purposes.
  • Batteries CAN explode while charging if proper precautions are not taken, so please make sure they are placed away from any open flame or ignition sources (such as pilot lights) while charging.  Also, be aware that they will most likely expand a little bit during the charging process due to heat buildup within the packs.

Can I charge a 24V battery using a 12V charger?

It’s true that many mobile devices, such as laptops and radios use 12V chargers to charge their batteries.

However, while it is possible for a 24-volt battery to be charged by a 12-volt charger there will eventually come the point in which the voltage can no longer compensate for what little power remains within the battery itself rendering any further charging attempts pointless.

You can charge a 24V battery using a 12V charger, but it will not be fully charged. A 24-volt system is twice as powerful in comparison to that of the standard 12 volts and only needs half an hour for full charging.

Tips to fix issues related to charging 24V battery with 12V charger:

If you are experiencing issues when charging a 24V battery with a 12V charger, here’s how to fix it.

  • First off, make sure the voltage is set correctly on your charger.
  • Second of all, be sure that there aren’t any loose connections or broken cables as these can lead to problems while in use and lower quality power output for your device being charged.
  • Last but not least important step would be swapped over from using an “in-vehicle” type system instead of plugging into a cigarette lighter outlet because this saves wear and tear on both ends by avoiding rusting wiring harnesses at the same time.


The 24V battery is charged by the 12V charger. This can be done manually, but it’s not recommended because of safety issues and the risks involved with overcharging a car battery.

A better option is to use an automatic voltage regulator that will regulate charge time according to weather conditions or the type of vehicle being charged.

In order to charge a 24V battery with an adapter that only generates 12 volts, you’ll need a boost converter. Boost converters are devices capable of generating voltage greater than the input and maintaining constant power output for both voltages.

After using the 12V charger to charge a 24V battery, you should know that it is very important not to have any other devices connected as this can cause an overload of electricity and result in damage.

Leave a Comment