What will a 3000 Watt Inverter Run? Quite a Lot

By Matthew Joseph Nandirio •  Updated: 10/07/22 •  6 min read

Quick Anwser

The 3000 watts of the inverter can run a couple of lighting, fridge, microwave, coffee machine, household equipment, Computer, charge several smartphones. Any electronic equipment can be plugged in until you surpass its upper limit. Evaluate the maximum usage of the apparatus wattage.

Which appliances will 3000-watt inverters run?

The following electronic appliances can be plug into the 3000-watt inverter. Ensure that the total capacity of the inverter should not cross the maximum limit of the inverter.

You may have to decide which equipment has to be powered if the energy consumption exceeds the maximum limit.

What will a 3000 Watt Inverter Run?...
What will a 3000 Watt Inverter Run? Quite a Lot

The 3000-watt inverter will consume a minimum of 20 watts of power even if there is no device is connected to the battery.

The 20 watts of power is required to run the core functions of the inverter, such as battery monitoring circuits, alarm circuits, and a small fan. 

A list of the appliance can be run on the 3000 watts of the inverter.

  1. Coffeemaker or microwave- 1000 watts each
  2. Toaster -1200 watts
  3. Refrigerator- 750 watts
  4. Freezer- 600 watts
  5. Computer-150 watts
  6. Stereo- 300 watts
  7. Television -250 watts
  8. Portable electric heaters-1200 watts
  9. Ceiling fan- 140 watts

What can a 3000 Watt inverter run?

The 3000 watts is good enough energy source to power several devices that come under the upper limit of the inverter. You can force the range of the equipment as long as the upper limit of the inverter doesn’t surpass the 3000 watts capacity. 

Every electronic appliance comes with a wattage rating. The energy rating determines how much energy the device would require to power the core function and run smoothly.

Check the specification on the box. It is common practice to use every electronic equipment manufacturer to mention the approx wattage required for the equipment. 

Furthermore, the large size inverter requires some percentage of energy to run the core function.

Even if the inverter is not connected to any external equipment, it will continuously draw 15 to 20 percentage of the energy to run the internal function. 

Hence, the inverter capacity is always undervalued when calculated the output energy. The 3000 watts of the inverter could produce energy around 2400 to 2500 watts of the energy.

 The 3000 watts of the inverter can support several devices simultaneously. For optimum use, calculate the total wattage of the device connected to the inverters.

It will allow you to allocate sufficient energy to each piece of equipment and produce maximum output. 

Remember that not all equipment will run on the 3000 watts of the inverter. Some equipment would require higher energy output at the beginning.

If the required energy is not supplied, the equipment will fail and may not support the inverter. In this case, you may have to disengage some connected equipment to free up more energy. 

How long will a 3000-watt inverter run?

The battery’s capacity and the voltage output determine how long the battery will run when connected to the device. You can calculate the appliance operating power using the following formula.

For a 12 Volt System:

(10 x (Battery Capacity in Amp Hours) / (Load Power in Watts)) / 2 = Run Time in Hours


For a 24 Volt System:

(20 x (Battery Capacity in Amp Hours) / (Load Power in Watts)) / 2 = Run Time in Hours

Input the information and get the run time in hours to know the output of the 3000 watts inverter.

Remember that the output of the inverter per hour depends on several factors. The efficiency of the equipment and the fluctuation in the total power is also a deciding factor that makes a big difference in the final output. 

How many amps does a 3000-watt inverter draw?

At the maximum capacity of the 3000-watt inverter at 12 volts output, you could draw 249.9 DC amps per hour. Let’s say you are using the 200 amp 12-volt battery.

In this case, you can calculate the run time by dividing the 200 amp battery / 249.9 amps, which will be 0.8 hours run time.

The output of the inverter is affected by several factors. Therefore, nothing is fixed when it comes to calculating the total output of the device.

You should check what type of inverters you are using and the maximum output the battery can produce to run a specific device. 

Will a 3000-watt inverter run a cooler?

Yes. It is possible to run the small size cooler with the required energy capacity of around 1200 to 1500 watts. You can even run the efficient small-size fridge at the 3000-watt inverter.

Some large size cooler would have the amperage necessity of above 15 amperes. Check the energy requirement of each inverter to find out the approx wattage. 

What number of amps does a 3000-watt inverter draw?

The 3000 watts of the inverter will convert the 12 volt DC power from the batteries. It will draw 110 V AC for running electric gadgets that keep the inverter active and maintenance-free.

You can calculate the current drawn by the 3000 Watts of inverter using the below formula.

Watt (Power) = Volts (Voltage) x Amperes (Current)

Current drawn by 3000 W inverter= (3000/110) A = 27.3 Amperes approx.

What can you power using the 3000 watts of the inverter?

The 3000 watts of inverter could draw a sufficient amount of energy to power many household appliances. You can easily manage the load on the appliance and run several types of equipment simultaneously without needing an external source. 

The 3000 watts of the inverter can take a load of several types of equipment up to its maximum capacity.

Turn on the power display meter to check the running load and use the measurement to find the remaining capacity.

You can run several appliances such as a fridge, LED lights, LED TV, laptop, mobile charger, fans, and microwave oven and iron at the same time. 

When you switch the appliance to a water kettle or washing machine and air conditioner, which require the excess energy initially, it needs to be handled carefully.

Always check the amps on the display meter and disengage some foe the devices which are not essential for running the device. Balance the output load to the maximum capacity of the inverter. 

Inverter efficiency also determines how many appliances you can run on a single inverter. The modern inverters are designed to meet the excess energy supply.

Also, the new mechanism allows the users to bypass the overload and protect the equipment and the core functions of the inverters. 

Keep the load within limits and prevent the equipment from a burst of energy which may damage the system. With the energy meter, you can measure to total output the inverter can produce.

Based on that, find the number of equipment you can connect to the inverter without damaging them. 


The 3000 watts inverter could draw a sufficient amount of energy to power several household appliances. The inverter can generate the power source that would give the appliance the required energy and work efficiently.

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Matthew Joseph Nandirio

Matthew Joseph Nandirio is the Founder of walkingsolar. After graduating from the University of Houston in 2002, matt started working as an electrical and electronic engineer for several multi-national solar energy companies. He has a wide range of experiences including solar system requirement analysis, planning, maintaining, debugging and even solar device development through research. He now shares his 20 years of expertise through his articles on the walkingsolar website. Further, he is also the author of two books on Solar Technology, “Solar Power for Villages” and “DIY Solar System for Dummies”.