The Best Inverter Size for Power Tool Batteries

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Updated in April 2025 | By John

Are you a power tool user who needs to charge your batteries on the go If so, you need to know what size inverter you need.

An inverter is a device that converts DC power (from a battery) to AC power (like the power from your wall outlet). This means that you can use an inverter to power any device that requires AC power, such as a laptop, phone charger, or power tool.

But not all inverters are created equal. The size of the inverter you need depends on the power requirements of the device you want to power. So, before you buy an inverter, it’s important to know how much power your device needs.

In this blog post, I’ll discuss what size inverter you need to charge power tool batteries. I’ll also provide some tips on choosing the right inverter for your needs.

What Size Inverter To Charge Power Tool Batteries

The best inverter size for power tool batteries depends on the size of the batteries and the power requirements of the tools. For small batteries, a 1,000-watt inverter is sufficient. For larger batteries, a 2,000-watt or 3,000-watt inverter is recommended. Inverters with higher wattage ratings can power more tools at once and can also power tools with higher power requirements.

What Size Inverter to Charge Power Tool Batteries

What is an Inverter

An inverter is a device that converts direct current (DC) electricity into alternating current (AC) electricity. This is necessary for charging power tool batteries, which require AC power. Inverters come in a variety of sizes and power ratings, so it’s important to choose the right one for your needs.

How to Choose the Right Inverter

The first thing you need to consider when choosing an inverter is the size of the power tool batteries you want to charge. The inverter’s output power rating should be at least as large as the batteries’ amp-hour rating. For example, if you have a 12-volt battery with a 5 amp-hour rating, you’ll need an inverter with an output power rating of at least 5 amps.

You also need to consider the number of power tool batteries you want to charge at the same time. If you’re only going to be charging one battery at a time, you can get away with a smaller inverter. But if you’re going to be charging multiple batteries at the same time, you’ll need a larger inverter.

Finally, you need to consider the portability of the inverter. If you’re going to be using it in a remote location, you’ll need an inverter that’s lightweight and portable. But if you’re going to be using it in your home or garage, you can get away with a larger and more powerful inverter.

How to Use an Inverter to Charge Power Tool Batteries

Using an inverter to charge power tool batteries is very simple. Just follow these steps:

1. Connect the inverter to a power source, such as a car battery or a generator.
2. Connect the power tool batteries to the inverter.
3. Turn on the inverter.
4. The batteries will start charging.

You can also use an inverter to power other devices, such as laptops, phones, and tablets. Just make sure that the inverter’s output power rating is at least as large as the device’s power requirements.

Conclusion

Choosing the right inverter for charging power tool batteries is important to ensure that you get the job done. By following the tips in this article, you can choose the right inverter for your needs and get your power tool batteries charged up and ready to use.

Also Read: What To Do With Old Power Tool Batteries

FAQs about What Size Inverter to Charge Power Tool Batteries

What size inverter do I need to charge my power tool batteries?

The size of inverter you need to charge your power tool batteries depends on the wattage of the batteries and the number of batteries you want to charge at the same time. For example, if you have a 18V battery with a 5 amp-hour capacity, you will need an inverter that can output at least 90 watts (18V x 5A = 90W). If you want to charge two batteries at the same time, you will need an inverter that can output at least 180 watts (90W x 2 = 180W).

What is the difference between a pure sine wave inverter and a modified sine wave inverter?

A pure sine wave inverter produces a clean, smooth sine wave that is identical to the power coming from the wall outlet. This type of inverter is ideal for charging power tool batteries, as it will not damage the batteries. A modified sine wave inverter produces a square wave that is not as smooth as a pure sine wave. This type of inverter can be used to charge power tool batteries, but it may not be as efficient as a pure sine wave inverter.

How do I connect an inverter to my power tool batteries?

To connect an inverter to your power tool batteries, you will need to use a battery charger that is compatible with the inverter. The battery charger will have a DC output that matches the input voltage of the inverter. Once the battery charger is connected to the inverter, you can plug the inverter into an outlet.

What are the benefits of using an inverter to charge power tool batteries?

There are several benefits to using an inverter to charge power tool batteries, including:

You can charge your batteries anywhere you have access to an outlet, including in your car, at a campsite, or in a hotel room.
You can charge multiple batteries at the same time.
Inverters are relatively inexpensive and easy to use.

What are the drawbacks of using an inverter to charge power tool batteries?

The main drawback of using an inverter to charge power tool batteries is that they can be less efficient than charging the batteries directly from the wall outlet. This is because inverters convert AC power to DC power, which wastes some energy in the process. Additionally, inverters can be noisy, especially if they are not properly grounded.

About The Author

I am John, and I am the creator of this website. I have been in the woodworking industry for about 5 years. I developed my passion for DIY projects around the house when I was in high school. I have discovered a new appreciation for those who have the experience to pass along their expertise. They know what works best and are able to help others. I am proud to be among them.

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