What Fuel Does Generac Generator Use

by Anna

In an era where power reliability is paramount, Generac generators have emerged as a trusted solution for both residential and commercial needs. Known for their reliability and efficiency, these generators come in various models, each tailored to specific power requirements. One of the most critical aspects to consider when choosing a Generac generator is the type of fuel it uses. Understanding the fuel options available and their respective advantages and disadvantages is essential for making an informed decision. This article delves into the various fuels used by Generac generators, exploring their characteristics, benefits, and considerations.


Types of Fuel Used in Generac Generators

Generac generators primarily operate on four types of fuel: natural gas, propane, diesel, and gasoline. Each fuel type has unique properties that make it suitable for different applications and environments.


1. Natural Gas

Overview: Natural gas is a popular fuel choice for many Generac generators, especially those used in residential settings. It is a fossil fuel composed mainly of methane and is delivered through a pipeline network.


Availability: Natural gas is readily available in many urban and suburban areas, providing a continuous supply without the need for storage tanks.

Convenience: With a direct pipeline connection, there is no need for manual refueling, reducing the risk of power interruption.

Clean Burning: Natural gas burns cleaner than other fossil fuels, producing fewer emissions, which is beneficial for the environment.


Infrastructure Dependency: The generator’s functionality is dependent on the integrity of the natural gas infrastructure. Natural disasters or major incidents that disrupt the gas supply can affect the generator’s operation.

Installation Costs: Installing a natural gas generator can be more expensive due to the need for professional setup and connection to the existing gas line.

2. Propane (LPG – Liquefied Petroleum Gas)

Overview: Propane is another common fuel choice for Generac generators, offering flexibility and portability. It is stored in liquid form in tanks and is converted to gas when used by the generator.


Storage: Propane can be stored on-site in tanks, providing a reliable backup even when natural gas lines are compromised.

Long Shelf Life: Propane does not degrade over time, making it an excellent choice for standby generators that are not used frequently.

Clean Burning: Similar to natural gas, propane burns cleanly, resulting in lower emissions.


Storage Requirements: Propane tanks require adequate storage space and proper handling to ensure safety.

Refueling: Unlike natural gas, propane tanks need to be periodically refilled, which can be inconvenient during extended power outages.

3. Diesel

Overview: Diesel fuel is widely used in commercial and industrial Generac generators due to its energy density and efficiency. Diesel generators are known for their durability and long operational life.


Efficiency: Diesel engines are highly efficient, providing more power output per gallon of fuel compared to gasoline or propane.

Availability: Diesel fuel is widely available and can be stored on-site for extended periods.

Reliability: Diesel generators are robust and can operate in various environmental conditions, making them ideal for critical applications.


Emissions: Diesel engines produce more emissions compared to natural gas and propane, although advances in technology have significantly reduced their environmental impact.

Maintenance: Diesel generators require regular maintenance to ensure optimal performance and longevity.

Noise: Diesel engines tend to be noisier than their natural gas and propane counterparts, which can be a consideration for residential areas.

4. Gasoline

Overview: Gasoline is less commonly used in standby Generac generators but is a popular fuel for portable models. Its availability and ease of use make it a convenient choice for short-term or emergency power needs.


Accessibility: Gasoline is readily available at fuel stations, making it easy to obtain during an emergency.

Portability: Generac portable generators running on gasoline are ideal for temporary power solutions, such as during camping trips or outdoor events.

Initial Cost: Gasoline generators are typically less expensive upfront compared to diesel or natural gas models.


Storage: Gasoline has a shorter shelf life than other fuels and can degrade over time, especially if not treated with stabilizers.

Emissions: Gasoline engines produce higher emissions and are less environmentally friendly compared to natural gas and propane.

Safety: Gasoline is highly flammable, requiring careful storage and handling to prevent accidents.

Choosing the Right Fuel for Your Generac Generator

When selecting a Generac generator, it is crucial to consider the fuel type that best suits your needs. Here are some factors to keep in mind:

1. Application

Residential Use: For home use, natural gas or propane is often preferred due to the convenience of continuous supply and cleaner burning properties.

Commercial/Industrial Use: Diesel is typically the fuel of choice for commercial and industrial applications, thanks to its efficiency and reliability.

2. Availability and Infrastructure

Consider the availability of the chosen fuel in your area. For instance, if your location lacks natural gas pipelines, propane or diesel may be more viable options.

Evaluate the existing infrastructure and the feasibility of installing necessary connections and storage facilities.

3. Environmental Impact

If environmental considerations are a priority, natural gas and propane are better choices due to their lower emissions.

Advances in diesel technology, such as the use of ultra-low sulfur diesel and emissions control systems, have mitigated some of the environmental concerns associated with diesel generators.

4. Cost

Assess the initial cost of the generator, installation expenses, and ongoing fuel costs. Natural gas generators may have higher upfront installation costs but can be more economical in the long run due to lower fuel prices.

Diesel generators, while more expensive initially, offer superior fuel efficiency, which can result in cost savings over time.

5. Maintenance

Regular maintenance is essential for all generators, but the frequency and complexity can vary based on the fuel type. Diesel generators typically require more frequent and detailed maintenance.

Propane and natural gas generators generally have lower maintenance requirements due to cleaner combustion processes.

See Also  Choosing the Best Generator


Generac generators offer a range of fuel options to suit diverse needs and applications. Natural gas, propane, diesel, and gasoline each have distinct advantages and considerations that can influence your choice. By understanding the properties of each fuel type and evaluating factors such as availability, cost, environmental impact, and maintenance, you can select the most suitable Generac generator for your requirements. Whether for residential backup power, commercial operations, or portable use, there is a Generac generator and fuel option that can provide reliable and efficient power when you need it most.


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