Will A 22kW Generator Run My Whole House? (Answered)

Let’s begin with the topic Will A 22kW Generator Run My Whole House? The desire to secure backup power increases considerably in turbulent areas. News accounts from the past and present about tornadoes, hurricanes, tropical storms, fires, snowstorms, and ice storms can cause thousands of houses to lose electricity and motivate people to hunt for solutions to avoid the inconveniences and potential dangers of doing so.

Numerous factors might cause the electricity to go out, including bad weather, natural calamities, and an overburdened electrical grid. Electricity, previously considered a luxury, is now a need.

Without it, you risk being in danger during intense storms as food expires, the internet goes down, and other mechanical devices that assist in safeguarding your house cease operating. You understand that a whole-house backup generator is the best power outage protection now that you know the advantages of standby generators over portable ones.

Will A 22kW Generator Run My Whole House?

A 22-kilowatt generator can power a 3-4,000 square foot house. They selectively use appliances while the generator runs to help the propane last longer and more effectively. The alternative is to install a more significant generator to run more of your home’s electrical systems.

22kW Generator Run My Whole House

Whole-House Generator Benefits

  • The Superior engine in the automotive-style (instead of lawn-mower style on a home standby)
  • Liquid-cooled (on larger models ) (on larger models ) In place of air-cooling to cope with prolonged outages
  • lowered noise (lower RPMs)
  • Lengthened maintenance windows
  • Options for load management and AC shedding
  • Backup the entire house (instead of only backing up essential circuits)
  • Fuel-Efficient  
Whole-House Generator Benefits

Smaller residences can be powered by typical home standbys, which range in kW output from 9 to 20. They have smaller, air-cooled engines that can power essential appliances like an air conditioner, a sump pump, a refrigerator, and some lighting for a brief period. Still, they are designed to only power some things simultaneously, back up larger households, or run continuously.

On the other hand, the power of whole-house generators can range from 22 to 48kW. The extra power gives you peace of mind because you won’t have to make sacrifices or difficult decisions like running a single air conditioner or a sizable refrigerator in the manner used in businesses. Instead, it will be almost as if nothing happened, and your house will be nearly operational.

Compared to standard standby generators, whole-house generators provide several advantages. They offer superior fuel options, such as natural gas, liquid propane, and diesel, and larger, more potent engines that are liquid-cooled for more extended periods of operation without maintenance.

3 Steps To Choose The Ideal Whole-House Generator

Step 1: Select A Fuel Source

It might be challenging to locate an excellent fuel source needed for power generation in many coastal and isolated areas of the country. Determining the fuel type is crucial in choosing the appropriate backup for your house.

Whole-house generators include a diesel option, making generator power more affordable than tiny home standbys that can only use natural gas (NG) or liquid propane (LP).

Tanks must be big enough to power the generator correctly for LP and diesel fuel. The natural gas meter and gas pipes must also have the appropriate size. The installation documentation is available on our product site. However, your contractor will confirm this with you before installation.

Step 2: Choose The Right Size

The success of any installation relies on the generator being properly sized, which necessitates having a solid understanding of electricity and the load requirements of your home’s electrical appliances.

When analyzing electrical loads, find the beginning amperage of each large appliance or item of equipment by consulting the manufacturer’s data plate.

Then, use the equation Starting Amps x Volts = Watts to get the combined starting wattage of your equipment. Divide the number of watts by 1,000 to get kilowatts.

Choose a rating for the generator output roughly 20–25% higher than the peak load (for example, if the total expected wattage is about 22 kilowatts, choose a 27 kW generator).

A higher-rated generator offers a safety margin of flexibility in case the load grows in the future and can run satisfactorily at about 80% of its total capacity.

Central air conditioning systems will be the significant wattage consumers. Divide the number of BTUs by 12,000 to get the size of an air conditioner in “tonnes” (Tons = BTUs/12,000). 5 Ton Unit, for instance, contains 60,000 BTUs.

Step 3: Choose A Transfer Switch

Your generator also needs a switch, just like a lightbulb does. When a power outage is detected, your standby can activate thanks to an automated transfer switch (ATS).

It accomplishes this by constantly monitoring utility power. When a power outage is identified, it instantly starts the engine, cuts off the current from the line, and activates the panel in your home using generator power.

Getting the appropriate switch and generator is essential to restore lost electricity. You must know your electrical service panel’s amperage to choose which will work for you. Finding the main breaker in your electrical panel will allow you to verify this (usually the big pull-out at the top).

The most electricity your home can use is 200 amps because the typical average-sized home has a 200-amp main breaker. It’s crucial to purchase a switch with the same amperage as the panel in your house. A 200-amp transfer switch is required if you have a 200-amp service. 


Did you know about Will A 22kW Generator Run My Whole House? The largest power supply available from an air-cooled standby is provided by the 22kW to 26kW Generators. The next step is a liquid-cooled generator, which comes in capacities ranging from 15kW to 150kW.

More than 20kW air-cooled generators are only available from two manufacturers. Generac has capacities of 22kW, 24kW, and 26kW, whereas Briggs & Stratton has 26kW.

The larger generators are more efficient and consume less fuel because they have the same size engine as competitive 20kW generators. Run several air conditioners simultaneously. Power the water heater, electric stove, and dryer.

At the same time, keeping all the tiny appliances, entertainment systems, and lights on. Please conduct your power audit to measure your generator, speak with the electrician who will install it, and have your plans approved by your local building and code enforcement agency before determining which generator to buy.

Frequently Asked Questions

Are weather conditions a factor while using a generator?

Its operation will be protected by rain, even severe rain. It should be elevated if a generator is installed in a known flood zone. When water is drawn into the engine block when the equipment is submerged, the air-cooled engine could suffer damage. Any moisture can harm a generator.

Does home insurance provide coverage for a generator?

If there is a flood or other weather-related damage to your generator, check with your insurance provider to see if a homeowner’s policy protects it.

How long does a generator have a life?

A well-maintained generator will last 30 to 40 years. Every piece of machinery that relies on an engine for power needs maintenance. Customers who purchase a Generac Generator from CM Mose & Son can take advantage of a comprehensive maintenance package.

What time of year is ideal for generator purchases?

A generator is best purchased in advance of a necessity. All around the United States, C.M. Mose & Son ships Generac generators. To get a price, call. Due to the current local demand, scheduling an appointment for a quote is essential as soon as possible.

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