How Many Watts Does a Mini Split Use (Power Explained!)

Mini-split air conditioners are the perfect solution for your home. They’re inexpensive to run, easy to install, and require only a small amount of space, making them ideal for homes of any size.

While mini split air conditioners are much more energy-efficient than a traditional system, they still need power to run. The amount of energy can vary quite a bit between different brands and models.

Understanding how much power your mini split AC uses will help you determine if it’s worth making the switch or not.

If you’ve ever wondered about the power consumption of a mini-split air conditioner, you’ve come to the right place.

How Many Watts Does a Mini Split System Use?

If you find yourself wondering how much your new AC may cost to run, check out our handy table below.

Mini Split BTUWattageUS Average per kWhCost Per Hour
6,0001,758 W13.19cCosts $0.23 per hour
8,0002,344 W13.19cCosts$0.30 per hour
10,0002,930 W13.19cCosts $0.31 per hour
12,0003,516 W13.19cCosts $0.46 per hour
14,0004,102 W13.19cCosts $0.53 per hour
18,0005,725 W13.19cCosts $0.74 per hour
21,0006,154 W13.19cCosts $0.80 per hour
23,0006,740 W13.19cCosts $0.88 per hour
24,0007,033 W13.19cCosts $0.91 per hour

*Data above does not take SEER or EER into account and is based on averages

Determine Mini Split Energy Usage

Factors Determining Energy Usage in Mini-Split Systems

Heating & Cooling Load
The amount of energy needed by a mini split system to heat or cool a space is called its heating or cooling load. The heating and cooling load of a mini-split system is affected by the size of a house – the bigger the house, the higher the load.

The Outdoor Temperature
The temperature outside your home will affect mini split AC efficiency. As the outdoor temperature increases, the compressor in your AC unit has to work harder to cool the air inside your home.

The Number Of Mini Split Units
As you may expect, the more mini split systems you have, the more energy you’ll use. In larger homes, more mini split units may be required to maintain a stable temperature.

BTU Of The Systems
BTU, or British Thermal Unit, is a measure of energy. One BTU refers to the amount of energy required to increase the temperature of a pound of water by 1° F. It is most frequently used when talking about heating and air conditioning units.

Mini Split AC Wattage

How To Calculate The Power Your Mini Split Is Using

There are two common ways to calculate the power your mini split is consuming

  1. Check the manual. Before chucking your manual in the kitchen drawer, never to be seen again, take a look at the wattage. This will tell you exactly how much power your unit is consuming.
  2. Alternatively, if you know the BTU of your mini split, simply divide the BTU by the EER.

 Eg. BTU of 6,000 / EER 10 = 600W

How To Save Money When Using Mini-Splits

Use the following tips to ensure you are keeping those costs down when running your AC.

Focus on Efficiency: Understand SEER

SEER is the standard measurement of cooling efficiency for air conditioners. SEER stands for Seasonal Energy Efficiency Ratio. The higher the SEER rating, the more efficient the air conditioner is.

Naturally, the more efficient the mini-split is at cooling your home, the lower the cost.

Focus on Efficiency: Understand EER

EER stands for Energy Efficiency Ratio, another measurement of cooling efficiency. The higher the number, the more efficient the air conditioner. When it comes to comparing different air conditioners in terms of energy efficiency, the EER is crucial.

So what’s the difference between EER and SEER? SEER considers the efficiency across an entire season, while the EER is a conventional efficiency measure of an AC unit.

Related Article Learn To Convert SEER To EER

Check the Energy Star Rating

The Energy Star is a joint program of the US Environmental Protection Agency and the US Department of Energy, helping us all save money and protect the environment through energy-efficient products and practices.

The Energy Star label is on products that have been independently certified to use at least 15% less energy than standard products. Selecting a mini split with an Energy Star rating will ensure your AC is more energy-efficient, helping save you money.

Maintain Your Unit

Keeping your unit regularly maintained will save you money in the long run. Regular maintenance will keep your unit running longer, keeping it working as efficiently as possible.

Be Patient

Don’t touch the dial! Don’t forget cooling a room takes time, and constantly fiddling with the temperature dial substantially reduces the efficiency of your unit.

Save Money When Using Mini Split AC

People Also Ask (FAQ)

How many watts does a Mitsubishi mini split use?

A Mitsubishi mini split air conditioner uses anywhere from 300 to 600 watts of electricity. This is significantly less than a window unit.

If you want to know how many watts a specific Mitsubishi mini split air conditioner uses, you should look at the BTU rating of the unit. This unit is used to measure how much cooling power an air conditioner has.

Will a 10,000-watt generator run a mini split heat pump?

A 10,000 watt generator is enough to run the typical mini split heat pump. In fact, a 10,000-watt generator is more than enough to run several mini split heat pumps.

How many amps does a ductless mini split use?

The number of amps a mini split uses depends on the size of the unit. In general, the larger the unit, the more amps it will use.

What type of controls do most mini split systems use?

Most models come with small, handheld remote controls. These controls can be set to turn the air conditioner off and on and adjust the temperature of the air based on the needs of the room.

Advanced models often come with their own apps, allowing you to control your unit from your smartphone.


Mini split air conditioner units are an excellent investment for most homes. Understanding a little about your unit’s energy consumption, especially how you can make them run more efficiently, will allow you to enjoy a cool home without breaking the bank.

Josh Mitchell

Josh Mitchell

My name is Josh and I am obsessed with DIY and improving my family home. HVAC topics can be tricky for homeowners so I decided to share my knowledge on the subject. When I am not working on DIY projects, you can find me at the beach or my local coffee shop.