Home Backup Generator – Gasoline Or Diesel?

When the power goes out, a backup generator can keep your home warm (or cool), cooking, and most importantly, lit. But when it comes to backup generators, there are two main types: gasoline and diesel. So, which is the best option for you?

Is Gas Or Diesel Better For A Generator?

The fuel efficiency of gasoline is lower than that of diesel, despite gasoline being more widely available. You may carry your portable generator from your house to a construction site or to a camping place for a weekend break if you have a gasoline-powered generator.

Diesel generators also make more noise and give out a stronger stench than natural gas generators while they’re running. In this case, natural gas is the apparent victor since it is a far more environmentally friendly energy source, as well as less invasive in terms of both sound and smell.

What Is The Best Fuel Source For A Home Generator?

In terms of generator fuel efficiency, diesel is the most potent, producing 138,700 BTUs per gallon (enough to heat an average-sized room for 6 to 12 hours).

Is It Cheaper To Run A Generator On Gasoline Or Natural Gas?

Generators powered by natural gas are more energy-efficient and less expensive than those powered by fossil fuels. Natural gas generators generated 43% of the nation’s power in 2019, according to the U.S. Energy Information Administration.

Which Is More Efficient Diesel Or Propane Generator?

Propane generators have negative environmental impacts, however, they are still the best option for environmentalists. Clean burning fuels like propane are hard to get by these days. Per gallon, it creates fewer pollutants and emits fewer greenhouse gases than gasoline or diesel does.

What Is The Best Size Generator For A Home?

Your refrigerator, freezer, well pump, and lighting circuits may all be kept running with a generator with a power output of between 5,000 and 7,500 watts. All of these appliances may be powered simultaneously by a 7500-watt generator. This is a wonderful generator for a recreational vehicle (RV).

Related Questions and Answers

What gas is best for a generator?

Using unleaded gasoline that has not been contaminated is best for a generator. An octane rating of 87 octane/87 AKI is also good. While ethanol blends of up to 10% are permissible, it is best to use premium gas without any ethanol.

What fuel does a whole house generator use?

Whole-house generators have a diesel option, unlike smaller standbys that can only run on natural gas (NG) or liquid propane (LP). This makes generator power more affordable. A big tank is needed for both LP and diesel fuels to power the generator properly.

Is it cheaper to run a generator on propane or natural gas?

Propane has a higher energy density than natural gas, although it often costs more. Natural gas is 40 percent less expensive than propane, making it a more cost-effective option for your generator. Natural gas isn’t an option in many places, or it’s too expensive to upgrade the service to meet demand.

Are gas generators cheaper than diesel?

Diesel and gasoline generators have a few key differences: Diesel generators use less fuel than their gasoline-powered counterparts. Generators powered by diesel use less fuel than those powered by gasoline, and diesel is also more expensive.

How long can a diesel generator run continuously?

Diesel generators with tanks that last 48 or 72 hours are available, although they are less common. Take the time to cool down the generator before recharging it with diesel. Natural gas generators may theoretically operate eternally since they are linked to a home’s natural gas pipes.

Does a generator run longer on gas or propane?

Because propane generators produce fewer BTUs per gallon of fuel than gas generators, they have a lower overall efficiency. When it comes to the ecology and your generator, propane is a better choice than gasoline.

The Best Home Standby Generator To Buy

Only a portion of the standby generators on the market today are truly worth your money. You can find out which ones are in this video:

Are propane generators quieter than gasoline?

In comparison to other fuels, propane is a very inexpensive option. Propane also has a lower carbon footprint than either gasoline or diesel because of how cleanly it burns. Aside from the fact that propane generators are very low-noise, they are also ideal for use in residential areas.

Are Generac generators gas or diesel?

When you have a Generac backup generator in your house, it does all the work for you. In the same way that a central air conditioning unit stands outdoors, this device is powered by natural gas or liquid propane (LP).

What is the average cost to have a whole house generator installed?

You should anticipate spending anywhere from $7,000 to $15,000 for the generator, $5,250 to $11,250 for installation, $0 to $900 for electrical wiring, and $165 to $485 annually in maintenance and repair expenditures, according to our estimates.

What is the cheapest fuel to run a generator?

Natural gas and diesel are the two most affordable choices, but comparing the two may be difficult. However, although diesel costs more than natural gas, it has a greater energy density and hence burns cleaner.


While both gasoline and diesel generators are very effective and affordable to operate, which one is best depends on a number of factors. To be sure which one fits your needs best will require doing your due diligence before purchasing.

The “whole house generator sizing is a fairly straightforwards process. It is easy and you can do it with just a few calculations performed over several minutes.

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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