Will A 12000 Watt Generator Run A House?

  • By: Umer.A
  • Date: June 8, 2022
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Nothing is more daunting than being less prepared at the time of the blackout. It would be best if you invest in a perfect 12000-watt generator. The generator works efficiently to run all appliances, e.g., furnaces, refrigerators, and air conditioners.

A 12000-watt generator’s working depends on the house’s size and the appliances you run. The best average generator to run everyday devices is around 10000-12000 watts.

Know Your Power

The higher the power wattage of the appliance, the higher the electricity it will consume. The size of the generator you purchase depends on the watts of the devices you want to run.

Add the requirement of the wattage of the essential appliances to calculate your desired power need. An average bulb takes around 100 watts. In comparison, a coffee maker and a refrigerator take about 1000 watts.

Which Generator Is Right for You?

The best generator brands in the market include Kohler, Briggs & Stratton, and Generac. The generator’s power plus its size and costs vary. So, you need to choose accordingly.

Portable, Small Generators:

There are smaller generators on the market which run on gasoline. There are pull-start models which can power between 1000-5000 watts. Plus, such generators are handled in terms of recreation and power tools.

Next, there are inverter generators which are highly efficient, quiet, and lighter than conventional ones.

Portable, Large Generators:

The 7500 watts generator is enough for keeping the lights on. It offers enough power to run the home appliances except for the heat and air conditioning.

Small generators can run around 1000-5000 watts. However, heavy-duty generators can run around 10000-15000 watts.

To find out the generator size, you need to calculate estimated energy needs. Include all the devices you plan on running at times of breakout power outage.

Use the power requirement calculator. Make sure to pay attention to starting and running watts. Choose a slightly bigger generator than your calculated power needs.

Safety Tips!

It is essential to follow safety precautions when you run a portable generator.

  • Never use the generators inside the garage or home. You must open windows or places where carbon monoxide can quickly enter.
  • If you use an extension cord to the appliances, it should be rated for the strength it will offer. It would be best if you never plugged in the extension cord to the outlet within your home. This can result in back-feeding. The power will travel in the opposite direction to killing or injuring workers when restoring power.
  • Make sure to get connected with a licensed electrician to wire the generator directly within the home.

Do Generators Run Your Whole House Power?

Yes, generators can run the whole house power. Starting at around 12000 watts, they can efficiently run the entire house. You can run fans, TVs, computers, lights, refrigerators, AC, and space heaters.

Generators Run Your Whole House Power

Do You Need the Generator to Power the Entire House Or Just The Essential Equipment?

If you reside in an area where power breakouts are common, invest in large generators to power the entire house.

However, if you live in an area where power outages are less common, you should run the generator a few times within a year. A small generator will also work well for you. Such generators are capable of running the essential equipment. This is all based on your preference, so choose wisely.

What Appliances A 12000-Watt Generator Runs?

A 12000-watt generator can manage all heavy appliances. If you plan on buying a 12000 watts generator, make sure you need such power consumption. Having this much power allows you to run 3-4 devices without even plugging off.

A 12000-watt generator can easily run the furnace, refrigerator, lightings, microwave, laptop, computer, desktop, and TV.

Can I Use A Large Portable Generator to Power Sensitive Electronics?

There’s no harm. Large generators usually don’t suffer from high harmonic distortion. 3% THD gives enough threshold to give constant running power. And it is safe to run a modern household or electric appliances.

How Much Does A 12,000 Watt Generator Cost?

The price of the generators depends on the features, brand, and size. When you plan on buying a 12000 watts generator, you need to ensure it will cost you around $800-$1500.

How Long Will A 12,000 Watt Generator Run?

The run time of 12000 watts generators depends on its engine’s fuel efficiency and tank size. Most of the 12000 watts generators can run for around 8-12 hours, having approximately 50% load.

Can You Power Your Entire House with A Portable Generator?

Yes, but it depends on the number of appliances you use. For instance, a 12000-watt generator can run essential household appliances. However, 12000-watt generators will not run a large house. It quickly powers lights, fans, TVs, or refrigerators.

What Generator Can Power A Whole House?

You can run critical appliances using generators with a power of 5000-7500 watts.

What Size Breaker Do You Need for A 12000-Watt Generator?

It would be best if you had a 50amp breaker for a generator of around 12000 watts.


If you’re wondering a 12000-watt generator will run a house or not? Your confusion is now cleared. A large generator will run all household appliances effortlessly. But again, it all depends on the size and number of appliances you want to run with this generator.