The Best Power Inverter for Air Conditioners

Looking for a backup inverter for your air conditioner? Good idea! but what kind of investor are you going to buy? That’s probably why you’re here.

Our guide to the best air conditioning inverters will help you answer these questions and make the right choice.

Technology makes life easier every day. Even when we travel or camp. You can use all electronic devices from laptops to refrigerators and even air conditioners. It’s always a good idea to have a backup plan along with a battery pack!


What size inverter do I need to run the air conditioner?

Before choosing an inverter, let’s first look at what type of air conditioner you are going to use. There are generally three types of air conditioners. We are going to list the air conditioners with their average power.

Central air conditioner

3.5 kW

Window air conditioner

500 Watt – 1.5 kW

Portable air conditioner

700 Watt- 1.7 k

Depending on the size, an average air conditioner needs between 1.5 and 3 kW of power to operate. The size of the inverter must be at least 1.5 or 2 times larger in power to handle the current peaks (when AC is on/off).

Size of AC



1 ton

12,000 BTU

1.25 kW approx

How To Choose the Right Inverter for your Air Conditioner?

Cell phones and laptops need a small inverter, but we can’t use it with a two-ton air conditioner. There are many things to consider, such as the power of the air conditioner, your budget and the size of your RV or tent. Let’s start.

​Wattage requirement of the air conditioner:

Air conditioners are among the heavy electronic devices. We need bigger inverters to make them work. I suggest checking the specs. We are looking for the cooling capacity and power requirement of the air conditioner.

​Sine waveform:

Most inverters use one of two sine waveforms. Pure sine wave or modified sine wave, pure sine wave is an expensive but safer option. Especially with large air conditioners, I highly recommend using pure wave power converters.

​Surge Capability:

The surge capacity is especially important in air conditioners and refrigerators. We need an inverter that can handle at least twice the amount of power the air conditioner needs. That’s because it uses twice as much energy for the first two hours until the temperature drops to a certain level.

How much power does an average air conditioner draw?

An average 1.5 ton air conditioner draws about 8000 peak watts and 3.5-4000 watts on average. Taking into account the overvoltage, the inverter we need should be about 4000 Watts.

The formula to calculate the DC power (in amps) from the battery is:
Watts (power) = volts (voltage) x amps (current)

The current drawn by a 4000 watt converter is,
4000 watts / 120 volts = 33,334 amps.

Reviews of our favorite inverters for your air conditioner

1. Aims Power 5000 Watt Industrial Pure Sine Wave Inverter:

The Aims 5000 Watt inverter is suitable for large air conditioners (up to 2.5 tons). It takes a 12 volt DC input and converts it to 120 volts AC. Provides 5000 Watts of continuous power with an increase to 10,000 Watts.

Aims offers high quality industrial inverters that you can use with heavy appliances such as air conditioners and refrigerators. It’s a bit pricey, but it’s worth the price.

There are two dual GFCI protected AC outputs and you can select an appropriate frequency (50/60 Hz). Dual thermally controlled fans ensure that the inverter does not get hot even under heavy loads. It comes complete with an on/off switch and an LED indicator.

AIMS Power PWRIG200012120S 2000W Pure Sine Inverter, Continuous 4000W Surge Peak Power, 12V DC Input, 60hz or 50hz Switch, 1 GFCI Dual Outlet


  • Heavy pure sine wave inverter.
  • 5 kW continuous power, 10 kW maximum power.
  • Two GFCI protected outlets.
  • Direct AC terminal block connector, isolated neutral/ground.
  • LED indicator with five functions for protection.
  • On off switch.
  • 5000 watts continuous power, 10,000 watts peak, 12 volts DC input, pure sine wave
  • 60hz or 50hz switch, high efficiency low voltage enhanced output, dual 2 GFCI output
  • Direct connection AC terminal block connector and wire for remote on/off switch, insulated ground and neutral
  • Short circuit protection (GFCI and AC circuit breaker), on/off switch, LED indicator with
  • 5 functions protection
  • AC circuit breaker, dual thermally controlled cooling fans, 20A GFCI outputs per block


  • Dual cooling fans (thermally controlled)
  • Frequency selection 60 Hz or 50 Hz
  • 0 amps per GFCI output block


  • No USB connection
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2. Giandel 4000 Watt Pure Sine Wave Inverter

The Giandel 4000 Watt Pure Sine Wave Inverter is suitable for air conditioners up to 2 tons. It can handle most other heavy appliances such as refrigerators. It can withstand a power surge of up to 8000 watts and a continuous power of 4000 watts.

Compared to the expensive Aims inverters, the price is reasonable. It has a 2.4 amp USB output in addition to the four 120 volt AC outputs. The inlet and outlet plugs are on either side, and the smart cooling fan keeps heating issues in one compartment.

The LED display, power button and remote control make the inverter an excellent choice for air conditioning. Plus, Giandel’s excellent customer service is the icing on the cake.

GIANDEL 4000W Heavy Duty Pure Sine Wave Power Inverter DC12V to AC120V with 4 AC Outlets with Remote Control 2.4A USB and LED Display


  • Pure sine wave inverter.
  • Aluminum alloy shell.
  • 4 kW continuous power, 8 kW maximum power.
  • Protection against overload and short circuit.
  • Four 2.4 amp USB and GFCI protected outlets.
  • Smart cooling fan.
  • Power switch.
  • Isolated input/output design.
  • Giandel 4000W Heavy Duty Pure Sine Wave Inverter – 4000W True Sine Wave, 8000W Peak Power, with LED Display, 12VDC, 120VAC with Four AC Outputs and 1×2.4A USB Port
  • With a remote control: more convenient to turn on/off the inverter while applying to motorhome, truck, car and solar system
  • Wide Applications for Indoor and Outdoor Use – Ideal for RVs, boats and emergencies in the event of a power outage. 4 sockets for multifunctional emergency use during vacations, business trips and camping. 4000 W heavy duty for emergencies such as hurricanes, storms, blackouts, etc.
  • Full safety protection: over voltage, under voltage, overload, short circuit, overheat, polarity reversal (fuse). Auto reset function and GND protection against electricity leakage (lightning). Product liability is covered by AIG.
  • Isolated inlet/outlet design and soft start technology, large and durable aluminum alloy housing provides advanced protection against drops and bumps, intelligent cooling fan helps reduce heat and prevent shortages.


  • LED display (voltage, current, power and more)
  • Includes a remote with 25 feet of cable
  • Excellent customer service


  • Some units had problems with solar indicators
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3. Aims Power 3000 Watt Pure Sine Wave Power Inverter

The Aims 3000 Watt Power Pure Sine Wave Inverter delivers 3000 Watt continuous and up to 6000 Watt peak power. It’s a little more expensive than Giandel, but it’s a reliable option and great for backup power.

You can use a one-ton air conditioner on this inverter and some other appliances, such as power tool charger, laser printer and microwave oven. It is a pure sine wave inverter, which means much quieter than normal inverters. The inverter has two 120 volt AC outputs and a 2.1 amp USB output.

AIMS 180 Watt Pure Sine Car Power Inverter with Cables USB Port


  • Pure sine wave inverter.
  • 3 kW continuous power, 6 kW maximum power.
  • Two 2.1 amp USB and GFCI protected outlets.
  • Isolated ground/neutral and built-in cooling fan.
  • LED indicator.
  • Two year warranty.
  • POWERFUL: 3000 watts continuous power / 6000 watts peak power, pure sine wave inverter converts 12V DC to 120V AC 60Hz, clean pure sine wave power, soft start technology, compact design, light weight
  • PROTECTIONS: overload, over temperature, high voltage, low voltage, short circuit, with internal fuses, low and high voltage alarm, cooling fan and insulated neutral. 90% efficiency
  • FEATURES: Works with electronics, appliances, tools, pumps and more up to 20 amps. Includes USB port, LED indicators, ground terminal and optional external switch
  • TRUST GOALS: Buy with confidence. Active in the investment world for over 20 years. All Nevada Sales, Warranty, and Technical Support Supported
  • APPLICATIONS: Ideal for off-grid or back-up power systems using a 12V battery(ies) in trucks, vans, buses, homes, boats, cabins, vehicles and solar suppliers and other preferred OEM applications indicate a UL 458 and CSA listing. 2 year warranty. Use high quality copper cables in your system.


  • Compact design
  • Low / High Voltage Alarm
  • Overload protection


  • A bit expensive
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4. Xantrex 813-3000-UL XPower 3000 Watt Inverter

The Xantrex Xpower 3000 Watt Inverter is an excellent choice for air conditioners. It delivers 3000 watts of continuous power and can withstand high peaks. You can use it with up to 1.5 tons of AC power and a number of other electronic devices such as microwaves, small vacuum cleaners and monitors up to 17 inches.

Compared to the expensive Aims inverters, the price is reasonable. It has two 120 volt outlets, but no USB outlets. The remote on/off switch makes it easy and convenient to use.

Xantrex 813-3000-UL Inverter, X-Power 3000W 12V Mod. Sine


  • Modified sine wave inverter.
  • 3 kW continuous power and high peak power.
  • Two 120 volt sockets.
  • High/low voltage protection.
  • Complies with UL458, a safety and regulatory standard for mobile applications
  • Proven performance and benefits in this product niche
  • Designed to convert most of the available battery power to AC power, while providing a high peak capacity to power products that require more power to activate initially.
  • Dual GFCI AC outlets, a remote on/off panel, plus overload and temperature shutdown complete key product features
  • Applications range from home appliances such as microwave ovens or small refrigerators, to office electronics such as laptops and printers, and for everything from hand-held power tools to electronic entertainment devices.


  • Automatic shutdown due to overload and overheating
  • Remote on/off switch
  • Very efficient


  • Modified Sine Wave Inverter
  • No USB output
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5. Energizer 4000 Watt Power Inverter

Metlab has tested the Energizer 4000 Watt inverter for safety and performance. The inverter can easily power household appliances such as air conditioners, refrigerators and microwave ovens. Air conditioners up to 1.5 tons work without any problems, as they can withstand a power surge of up to 8000 watts.

The connections are wired and you can power up to four devices at once (even when you look at the voltage). The LCD screen on the front shows the input and output voltage along with the battery level. Since it is a modified sine wave inverter, it is available at a lower price.

Energizer Power Inverter Series (4000)


  • Modified sine wave inverter.
  • 4 kW continuous power, 8 kW maximum power.
  • Two AC and USB outputs (each).
  • Wired connections.
  • LCD Display.
  • On off switch.
Brand Energizer
Item Dimensions LxWxH 15.25 x 7.6 x 5.5 inches
Item Weight 11.5 Pounds


  • Low price
  • LCD display for input/output voltage, battery level
  • METLAB tested and validated


  • Modified Sine Wave Inverter
  • A bit bulky
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6. GoWise Power PS1004 3000W Pure Sine Wave Power Inverter

The Gowise 3000 Watt Pure Sine Wave Inverter is a compact and safe inverter. With 3000 watts of continuous power and 6000 watts of peak power, it can run air conditioners up to 1.5 tons efficiently.

The inverter has three 120 volt AC outlets and one USB outlet. External switch and smart cooling fan make it easy to use. To make the customer experience more secure, it comes with five kinds of protections, namely thermal protection, overload protection, over voltage protection, under voltage protection and low voltage alarm.

GoWISE Power PS1004 3000W Continuous 6000W Surge Peak Power Pure Sine Wave Inverter with Starter Cables and 4 Output Sockets, Updated Model, Grey, Standard


  • Pure sine wave inverter.
  • 3 kW continuous power, 6 kW maximum power.
  • Three AC and one USB output.
  • Remote switch.
  • Thermal, overload, overvoltage, undervoltage and undervoltage protection.
  • Smart cooling fan.
  • GoWISE Power PURE SINE 3000W continuous / 6000W peak current, 12V DC to 120V AC converter with black and red wires with ring terminals, remote switch, 5 types of protection systems and 4 output jacks
  • Ideal for use in cars, boats and for power outages and maximum efficiency with computers, sensitive equipment and more
  • 5 protection systems: thermal protection, overload protection, overvoltage protection, low voltage protection, low voltage protection alarm
  • Total Harmonic Distortion (THD) <3%; Cooling fan temperature control and low interference soft start technology. Output voltage: AC 120V; Frequency: 60Hz


  • Low voltage alarm
  • Low harmonic distortion
  • Free shipping with Amazon Prime


  • Some customer service issues
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7. WZRLEB 3000 Watt Pure Sine Wave Inverter

The WZRLEB 3000 Watt Pure Sine Wave Inverter is easy to use and safe. The continuous power supply of 3000 watts ensures that your air conditioning runs smoothly. It has two outlets, but no USB outlets.

Separate LED displays for DC and AC voltage make observation easy. The thick PCB can withstand a high load, making this inverter the perfect choice for air conditioners (which require high peak power).


  • Pure sine wave inverter.
  • 3 kW continuous power, 6 kW maximum power.
  • Two GFCI protected outlets.
  • LED display for AC and DC voltage.
  • On off switch.
  • Two smart cooling fans.
  • Extra thick printed circuit board (high load capacity).


  • Voltage protection:
  • Handy and reliable
  • Dual Cooling Fans


  • No USB output.
Check Price On Amazon

8. Cobra CPI2590 Portable Power Inverter

Cobra CPI2590 is the perfect inverter for small portable air conditioners. Convert 12 volts direct current to 120 volts alternating current. The power is 2500 watts (continuous) and the peak power is up to 5000 watts. You can use up to half a ton (up to 5000 BTUs) of air conditioner with Cobra and also charge other small devices such as smartphones.

The inverter has three AC outputs and one USB output. You can connect the inverter to your car battery and monitor the battery level via the LED display. It is easy to transport and use, but it is not an ideal choice for large air conditioners.

Cobra CPI2590 Portable Power Inverter – 2500 Watt Car Charger, 2 Grounded AC Outlets, 12 Volt 2.4 Amp USB Port


  • Modified sine wave inverter.
  • 2.5 kW continuous power, 5 kW maximum power.
  • Three AC and one USB output.
  • Grounded outlets.
  • LED display for battery voltage and power consumption.
  • Protection on five levels.
  • Power switch.
  • POWERFUL – Connect and charge your smartphone, tablet and many other mobile devices via the convenient USB port. 2500 watts continuous (5000 watts peak power) and a 2.4 amp USB outlet with 12 V power supply means you can charge on the go.
  • VERSATILE – The CPI2590 provides you with a power source via two grounded outlets for office equipment and appliances that draw up to 2500 watts from your car, truck, RV or boat.
  • LED DISPLAY – Digital display showing the vehicle’s battery voltage and power consumption connected to the device in watts on a large LED display.
  • ON-THE-GO: This inverter supports you on tailgate, camping and road trips – and wherever you go.
  • PROTECTION: With Cobras Pentagon Protection, you have 5 levels of fault protection (thermal shutdown, reverse polarity, overvoltage shutdown, low voltage shutdown and low voltage alarm).


  • Compact and lightweight
  • Low battery alarm
  • Ideal for campers and travelers.


  • Modified Sine Wave
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9. Krieger 2000 Watt Power Inverter

The Krieger 2000 Watt Power Inverter converts 12 volts direct current to 120 volts alternating current. It is easy to connect through your car battery and easy to use with portable air conditioners. You can check the battery voltage and battery level via the LED display and turn it on and off at any time with the power switch on the remote control.

The device has a built-in thermal fan and two AC and USB outputs (each). Metlab has tested and approved it for both safety and performance.

Krieger 2000 Watts Power Inverter 12V to 110V, Modified Sine Wave Car Inverter, Dual 110 Volt AC Outlets, DC to AC Converter with Installation Kit Included – MET Approved to UL and CSA Standards


  • Modified sine wave inverter.
  • Continuous power of 2 kW and maximum power of 4 kW.
  • Two AC and USB outputs (each).
  • Remote on/off.
  • LED screen.
  • On-off switch.
  • 2000 watts continuous power, 4000 watts peak power, the KR2000 modified sine wave inverter converts 12V DC to 120V AC, connect the DC battery cables directly to your 12V battery and you have power on the go
  • Perfect for an emergency, hurricane, storm or power outage – our all-inclusive version! wired remote, ANL inline fuse set and 3-foot battery cables included
  • We support you. This inverter has all the protections you need. Overload, over voltage, under voltage, high temperature and short circuit. All this is displayed on the LCD screen, as well as the input voltage, output power and battery level.
  • Don’t just take our word for this inverter rating, this item has been tested, validated and approved by METLAB for both safety and performance. MET Approved under UL std 458 and CSA std C22.2
  • You can’t go wrong with Krieger! We believe in our product and quality and offer the warranty that it proves: “3 Year Parts & Labor Warranty”.


  • Metlab approved safety and performance
  • 3 year parts and labor warranty
  • Free installation kit


  • It was reported that some drives failed after some time
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10. Haitral 3000 Watt Power Inverter

The Haitral 3000 Watt modified sine wave inverter converts 12 volts direct current to 120 volts alternating current. You can use it to power a small portable air conditioner up to half a ton (5000 BTU). The device is compact and lightweight, you can easily take it with you in the car or camper.

The inverter has three built-in smart fans to prevent it from heating up. You can also take a laptop or camera with you. Considering the nominal power, the price of the Haitral 3000 Watt inverter is reasonable.

Modified sine wave inverter.
3 kW continuous power, 6 kW maximum power.
Three intelligent fans with temperature control.
Sturdy aluminum housing.
Two GFCI protected outlets.
On off switch.

HAITRAL Power Inverter 3000W Modified Sine Wave Inverter 3000 Watt 12 Volt DC to 110 Volt AC Converter with Three Intelligent Temperature Control Fans

  • BASIC DATA: Continuous power – 3000 watts peak power – 6000 Anti-reverse protection: Yes
  • SAFETY: Multiple protection: overload protection, reverse polarity protection, high temperature protection, short circuit protection, high voltage protection
  • PRODUCT STRUCTURE: The exterior is a solid, light, comfortable and practical aluminum housing; The internal, a neat set of integrated circuits, meets the specifications
  • WHAT YOU GET: 1 x 3000W inverter, 2 car battery cables, 1 user manual.
  • APPLICATION: It can be used as emergency power supply during snow storm, hurricane, storm, power outage, party. It can provide decent AC power for home appliances, official equipment and other electrical appliances, such as TVs, lighting lamps, DVDs, audio, video cameras, power tools, fax comparator, copier, laptop, etc.


  • Compact and lightweight inverter
  • Three cooling fans
  • Solid aluminum housing


  • No USB output
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