What Will a 12000 Watt Generator Run - With Calculation

A 12000-watt generator is a powerful tool that can be used in a variety of situations, from powering a construction site to providing backup power during a blackout.

There are running watts and there are starting watts. Running watts refers to the continuous power required to keep an appliance or device running while starting watts are the additional power needed to start the appliance.

A 12000 running watt generator is designed to handle heavy-duty uses, that’s why they are ideal for home backups and recreational use mostly making your life easier. However, understanding what appliances and devices can be powered by a generator of this size can be a challenge.

When you know the amount of power you need you will be able to run your generator amazingly. But it’s also important to note that the number of appliances that can be powered at once will depend on the generator’s capacity and the starting watts required by each appliance.

Overall, a 12000-watt generator is a versatile and powerful tool that can run a range of appliances and devices. However, understanding the capabilities and limitations of your generator is essential to ensure its safe and efficient operation.

In the following sections, we will discuss in detail the appliances and equipment that a 12000-watt generator can run, as well as the factors that affect its performance.

Things You Need to Know About a 12000-Watt Generator

If you’re considering purchasing a 12000-watt generator, there are a few key things that you need to know to ensure that you get the right generator for your needs. Firstly, a 12000-watt generator is a powerful machine that can produce a running wattage of 9500-10000 watts and a starting wattage of 12000 watts or more, depending on the model.

This level of power is suitable for powering large appliances and equipment such as air conditioners, refrigerators, and power tools. These typically have a fuel tank capacity of around 8-10 gallons and can run for 6-10 hours at 50% load, depending on the model and the type of fuel used.

Things You Need to Know About a 12000-Watt Generator

Finally, portability and noise level are essential considerations when purchasing a 12000-watt generator as they can be a pain to move around and also generate enough noise to damage your hearing.

Can I run my entire house on a generator? What Size Generator Would be Sufficient?

There isn’t any reason why you cannot run your entire house on a generator as long as you have the resources and a capable generator. As a rule of thumb, a 5000-watt generator can power a few essential appliances and devices, while a 7500-watt generator can handle more appliances and devices at the same time.

For larger homes or households with more appliances and devices, a generator with a wattage output of 10000 watts or more may be necessary. However, keep in mind that a larger generator may be more expensive, heavier, and harder to store.

If you have a larger home or want to power additional appliances and devices, you may need a generator with a higher wattage output. A good rule of thumb is to select a generator with a wattage output that is 25-30% higher than your estimated total wattage needs to ensure that you have enough power to run everything.

Is It Possible to Power a House with a 12000-Watt Generator?

Based on our personal experience and research, a 12000-watt generator can power most essential appliances and devices in a standard home, including the refrigerator, lights, TV, air conditioning, furnace, and well pump. However, it may not be enough to power all of these appliances and devices at the same time.

To determine the size of the generator you need to power your entire home, you’ll need to calculate the total wattage of all the appliances and devices you plan to run simultaneously. This will give you an idea of the total wattage you need from your generator. As a rough guide, a 12000-watt generator can power appliances and devices with a combined wattage of around 8000-9000 watts.

Home Generators: Why Do You Need Them in First Place?

As someone who has experienced power outages firsthand, we can attest to the importance of having a reliable backup power source. A home generator can provide you with the peace of mind you need during an emergency, ensuring that your family and home are safe and comfortable.

Home Generators Why Do You Need Them in First Place

During a power outage, a generator can power essential appliances and devices like the refrigerator, lights, and heating system, allowing you to maintain a sense of normalcy in your home. It can also power medical equipment or devices that are necessary for individuals with health issues.

Overall, investing in a home generator is a smart decision for anyone who values safety, security, and peace of mind during emergencies. From personal experience, we highly recommend considering a generator as part of your emergency preparedness plan.

Can a 12000-Watt Generator Run for Long?

From personal experience and research, we can say that a 12000-watt generator can run for a long time, depending on various factors such as the type of fuel, the load, and the maintenance. If you have a generator rated for continuous operation for 10 hours, you can expect to run it for that long without the need for recharging.

The load also plays a crucial role in determining the runtime of the generator. If you run the generator at full capacity for an extended period, it will consume more fuel and run out quicker. It’s recommended to operate the generator at 50-75% load capacity to ensure that it runs efficiently and lasts longer.

Another factor to consider is the size of the gas tank. Larger tanks can hold more fuel, providing longer runtimes. For example, a 12,000-watt generator with an 8.5-gallon tank can typically provide around 10 hours of runtime at 50% load. However, with an additional 7 gallons of fuel, you can increase the runtime to approximately 14 hours.

In summary, a 12000-watt generator can run for a long time, depending on factors such as fuel type, load, and maintenance. With proper care and maintenance, a generator can provide reliable backup power for your home for many hours, if not days.

How Much Power is Needed for Different Home Appliances?

When it comes to determining how many watts you’re your portable generator needs to be, the first thing you need to compile a list of the necessities, the absolute things that you need to run so that you can gather the wattage information and the surge information off of all those items and make sure that you purchase the generator that you need.

How Much Power is Needed for Different Home Appliances

However, that can be somewhat difficult as easy as it sounds, when you are using a portable generator it’s all about power management. Do keep in mind the electricity consumption will be high, the higher wattage is. Managing the way you use your electricity will keep you from going over the wattage that your generator can put out, yet still, use everything in your home that you need to use just manage it correctly.

The necessary house appliances and the total consumption of the wattage are as follows:

FM radio 100 watts
Light bulbs 100 watts
Fan 200 watts
TV 100 to 350 watts
Freezer 200 to 500 watts
Sum pump 400 to 3000 watts
Refrigerator 600 to 2000 watts
Microwave 600 to 1000 watts
Washing Machine 1000 watts
Coffee Maker 850 watts
Toaster 1100 to 1700 watts
Heater 1300 watts
Broiler 1400 watts
Water Pump 1000 to 3000 watts
Water Heater 3000 to 4500 watts
Dishwasher 1500 to 2500 watts
Clothes dryer 5000 to 10000 watts
Air conditioner 6000 to 6700 watts

By looking at the table mentioned above some of the appliances consume most of the electricity such as clothes dryers, water heaters, and air conditioners. So, if there is a power outage in your area and you want to use one of these high-power-consuming appliances use them one by one, don’t use them all at once.

What Are Surge Watts and Rated Watts?

Surge Watts and Rated Watts refer to the wattage of an appliance. This measurement expresses how much energy is being consumed by a piece of electrical equipment at any given moment.

Surge watts measure the power draw when devices are initially turned on only for 3 to 4 seconds, while rated watts calculate ongoing other components have reached their proper starting points.

The rated wattage of a 12000-watt generator is around 9000 to 9500-watt and surge wattage is exactly 12000 watts, so in conclusion, at a time the 12000-watt generator can boost around 9500 watts without any break.

Some Generator Maintenance Tips You Shouldn’t be Missing Out On!

If you’ve spent money on a portable generator, the last thing you want is trouble starting it when a storm hits or there is a power outage. It’s easier than you think. Just follow these generator maintenance tips to make sure your house appliances are protected and the generator last longer.

Some Generator Maintenance Tips You Shouldn’t be Missing Out On!

  1. First, an important tip is to make sure at to put your generator always away from flammable materials in order to save the appliances from any damage.
  2. Don’t ever leave an operational generator alone and unsupervised for a long period of time.
  3. Maintain your generator in a clean state.
  4. Keep the generator stored indoors when not in use.
  5. It is essential to adhere to the manufacturer’s guidelines at all times.
  6. Ensure that your generator has plenty of airflow and remember to swap out spark plugs annually.

What Will a 12000 Watt Generator Run – FAQs

Is a 12000-watt generator good for a house?
Yes, a 12000-watt generator is absolutely great and is suitable for powering larger houses. Depending on your home size and electrical loads, it can provide enough power to keep even the largest of houses running in case of an emergency situation or outage.
Will a 12000-watt generator run AC?
Yes, a 12000-watt generator can produce enough power to run an air conditioning (AC) unit. Generally speaking, as AC consumes about 6500 watts so the 12000-watt generator can run in a power outage without any trouble.
How long does a 12000-watt generator last?
The 12000-watt generator can last up to 9 hours if it is used consistently at peak wattage and serviced regularly.
How loud is a 12000-watt generator?
A 12000-watt generator is approximately as loud as an office conversation or running a washing machine, measuring in at 78 decibels.



In conclusion, a 12000-watt generator is capable of running extensive industrial and commercial equipment or powering an entire house. The wattage output can be used to power appliances like refrigerators, stoves, and water heaters as well as pumps for aerospace applications.

However, it should be noted that every application will have different needs in terms of voltage requirements and proper grounding systems designed with safety considerations in mind must also be properly implemented prior to use. Choosing the right size and type of generator based on these factors can help ensure optimal performance and prevent damaging your equipment.

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