Home Backup Generators – How Many Kilowatts Do You Need?

Different types and sizes of backup generators provide a range of power options to homeowners. Deciding how much energy output you need from your backup generator can appear challenging on the surface. Keep reading below to find out more.

How Much Backup Power Do You Need?

A backup generator supplies power to selected circuits or appliances in your home during a power outage. To select the right backup generator for your home, consider what you want to power and how long you need it to run.

The ideal entry-level option for homeowners who wish to enjoy all of the advantages of a standby generator over a standard home standby generator should choose a mobile backup generator. There are several options available on the market using solar, gas, propane, or deisel.

How Many kW Do I Need For A Backup Generator?

Calculate kilowatts multiplied by 1.25 as a safety net and for future power requirements. For your residence, this is the minimum Generator Capacity. An 18-22-kilowatt generator will be sufficient to power your house in the event of an outage if you establish that your minimum Generator Capacity is 17.5 kilowatts.

How Many Watts Do I Need For A Home Backup Generator?

Running even the most vital home appliances, such as the freezer and the pump for your well, may be done with a generator that is rated between 5,000 and 7,500 watt. All of these appliances may be powered simultaneously by a 7500-watt generator.

How Big Of A House Will A 22kw Generator Run?

It can power a 3-4,000 square foot home with a 22 kilowatt generator. It may simultaneously operate the washing or oven and the heating and air-conditioning systems. Avoid wasting gas by limiting the number of appliances you use while your generator is running

How Big Of A House Will A 20kW Generator Power?

More than 70% of all installations use a 20kW air-cooled generator. For houses under 2,500 square feet (with gas heat and hot water), use it as a whole-house generator; for bigger homes, use it as an essential circuits-only generator.

Will A 30kW Generator Run My House?

A 20kw generator is too tiny for a normal home, which requires between 25 and 40 kilowatts of power. It takes around 30 to 50 kilowatts of electricity to run the fundamental electrical functions of a typical American house. You’ll need at least a 30 kW generator if you want to be safe in the event of a power outage.

Related Questions and Answers

How much is a 30kW generator?

Power generators from 15kW to 30kW are available for between $3,500 and $12,500.

How To Size A Standby Generator

Sizing a standby generator is easy if you follow a few simple steps. This video should help:

How do I calculate what size generator I need?

Total amps divided by supply voltage / 1,000 equals full load kW. Full load kW x 0.25 = reserve capacity. Generator size for 100% power is equal to the full load kW plus the reserve capacity. For retail: 50 kW + 10 watts per square foot Additionally, 50 kW + 5 watts per square foot may be used in commercial settings.

How much does it cost to install a Generac 22kW generator?

Prices for a Generac Generator For a 7 to 24 kW whole-house unit, Generac generators cost $2,000 to $5,000, plus $3,000 to $5,000 for installation. Generators from Generac operate on natural gas or liquid propane and automatically kick on in the event of a power loss.

Will a 22kW generator run my house?

A 22kW whole-house standby generator is the ideal entry-level option for homeowners who wish to enjoy all of the advantages of a standby generator over a standard home standby. With a 27-36kW generator, 75 percent of the 200 amps that come into your electrical panel are replaced.

What will a 7.5 kw generator run?

Depending on the units you have, a 7500-watt generator can power most common domestic items including a refrigerator, hot water heater, well pump, freezer, light, and oven.

How much can a 60 kw generator power?

With LP gas, a 60kW standby generator can continuously produce 60,000 watts, and with natural gas, 55,000 watts.

How many kwh does a generator produce?

One kilowatt-hour is equal to one kilowatt-hour of generator output. Effort over a certain period of time is the common denominator in all discussions of power, mechanical or electrical.

Will a 14kw generator run my house?

14 to 20 kW can provide all of the essentials you need to get through a power outage for a medium-sized home.

How far does Generac generator need to be from house?

Clearances to consider: 18 inches (1.5 feet) from the house. Doors, windows, and fresh air intakes should be at least 60 inches (five feet) away. 3 feet in front of the generator is required for service access.


Before purchasing a home backup generator, it is necessary to know how much energy your home and lifestyle will demand in the event of a power outage. This is not as difficult as it sounds, so you can just get started!

The “standby generator” is a backup generator that is used to provide electricity in the event of an outage. It is also recommended for people who want to power their homes with renewable energy sources.

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Leon Ashcraft
About Leon Ashcraft

Leon Ashcraft is a Safety Instructor and consultant in Colorado with focus on OSHA, environmental health and safety, transportation safety, oil & gas, rescue operations and construction safety. Learn more about Leon here or connect with him on Twitter | LinkedIn | Medium