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How Much Propane Does a Generator Use?

How Much Propane Does a Generator Use?

Propane generators are a reliable source of backup power, often used during power outages or in off-grid locations. One of the key considerations when using a propane generator is understanding how much propane it consumes. In this blog post, we will explore how to calculate the propane consumption of a dual-fuel generator, discuss the efficiency of propane generators, and highlight the benefits of using propane as a fuel source. Additionally, we will address the runtime of a dual-fuel smart generator running solely on propane. Let's dive in!

How to Calculate How Much Propane Is Needed to Run a Dual-Fuel Generator

  • Simple Calculation

Calculating the amount of propane required to run a dual-fuel generator is essential for planning purposes. The propane consumption depends on various factors, including the generator's fuel efficiency, power output, and duration of operation. To calculate the propane usage, you need to know the generator's propane consumption rate, usually expressed in pounds per hour (lbs/hr).

Determine the propane consumption rate: Consult the generator's specifications or user manual to find the propane consumption rate in lbs/hr. This figure will vary depending on the generator's make, model, and power output.

Estimate the runtime: Determine how long you expect the generator to run continuously during a power outage or in your specific situation.

Calculate the propane usage: Multiply the propane consumption rate (lbs/hr) by the estimated runtime (in hours). This will provide an estimate of the total propane required to power the generator for the desired duration.

Remember that this calculation provides an estimate, and actual propane consumption may vary based on the generator's load, maintenance condition, and environmental factors.

  • Detailed Calculation

If the manual does not specify the generator consumption, the following is the detailed calculation formula for a typical generator:

Here's the calculation process to determine how much propane is needed to run a dual-fuel generator:

Step 1: Calculate the Horsepower:

First, calculate the horsepower based on the wattage of the load you intend to power:

Horsepower = (watts / 1000) x 2

For example, if you have a 2000-watt load, the calculation would be:

Horsepower = (2000 / 1000) x 2 = 4 horsepower

Step 2: Determine the BTU:

Next, convert the calculated horsepower into BTU (British Thermal Units):

BTU = horsepower x 10,000

Using the example above, the BTU calculation would be:

BTU = 4 x 10,000 = 40,000 BTU per hour

Step 3: Calculate Propane Consumption:

Now, you can calculate the propane consumption in gallons based on the BTU:

Gallons of propane = BTU / 92,000

Using the previous example, the propane consumption would be:

Gallons of propane = 40,000 / 92,000 = 0.43 gallons per hour

So if you want your propane could run for 3 days which is 72 hours, then:

the propane gallons you need: 72hours x 0.43 gallons per hour = 30.96 gallons

Which means you need 30.96 gallons of LPG to run for 3 days.

How Efficient Are Propane Generators?

Propane generators are known for their efficiency and reliable performance. When comparing different fuel sources, propane often stands out due to its high energy content and clean combustion. Propane generators typically offer higher fuel efficiency compared to gasoline or diesel generators.

The fuel efficiency of a propane generator is usually expressed in terms of gallons or pounds of propane consumed per kilowatt-hour (kWh) of electricity produced. The higher the fuel efficiency rating, the less propane the generator consumes to generate a specific amount of power. Efficiency ratings may vary between different generator models, but propane generators generally provide excellent efficiency levels. This not only reduces fuel costs but also contributes to a more environmentally friendly power generation solution.

Benefits of Using Propane Generators

  • Cleaner Fuel

Propane is considered a clean-burning fuel. When compared to gasoline or diesel, propane produces fewer emissions, including lower levels of carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxides (NOx), and particulate matter. Using propane generators helps reduce air pollution and contributes to better air quality.

  • Longer Shelf Life

Propane has a longer shelf life compared to gasoline or diesel. It can be stored for an extended period without degradation, ensuring that you have a reliable fuel source readily available for emergencies or remote locations. This longer shelf life makes propane generators ideal for standby power applications.

  • Quieter Operation

Propane generators typically operate more quietly compared to their gasoline or diesel counterparts. The combustion process of propane generates less engine noise, resulting in a quieter and more comfortable operating experience. This is particularly beneficial for residential areas or situations where noise restrictions apply.

  • Ease of Starting

Propane generators offer reliable and easy starting, even in colder temperatures. Propane has a lower freezing point than gasoline, ensuring better performance in winter conditions. This feature is crucial during emergencies when immediate power restoration is essential.

These benefits collectively make propane generators a reliable, efficient, and environmentally conscious choice for backup power needs, outdoor activities, and off-grid applications.

How Long Can Dual Fuel Smart Generator Run Solely on Propane?

Generally, a typical dual-fuel generator can operate on propane for a duration ranging from six to twelve hours. However, the runtime of a dual-fuel smart generator running solely on propane will actually depend on various factors, including the generator's fuel efficiency, propane tank capacity, and power demand. Since the generator operates exclusively on propane, it will consume fuel based on its propane consumption rate and the available propane supply.

The Alternative Option to Propane Generators

Unlike propane generators, the solar generators operate silently, emitting zero harmful emissions. If you're in search of a power solution that offers same flexibility and reliability, the Anker SOLIX F2000 Solar Generator is an outstanding choice.

The SOLIX F2000 reduces energy loss by 60%, promoting sustainable living by maximizing power conversion. The smart temperature control technology keeps the generator cool, reducing its temperature by up to 30°C, while the quiet cooling fans operate with 25% lower noise, creating a peaceful environment.

With a maximum output of 2400W, the SOLIX F2000 Generator is capable of powering up to 12 devices simultaneously. Whether you're camping, on an outdoor adventure, or in need of emergency power backup, this generator provides ample ports to meet your charging and power needs. 

Anker is dedicated to perfecting the customer experience by continually striving to meet and exceed customer expectations. The commitment to safety and customer support, combined with its exceptional features, makes Anker SOLIX F2000 an outstanding choice for anyone seeking a reliable, efficient, and versatile solar generator.


Understanding the propane consumption of a generator is crucial for planning and ensuring a continuous power supply. By calculating the propane usage, considering the efficiency of propane generators, and exploring their numerous benefits, you can make an informed decision when selecting a generator for your needs. Whether you're preparing for emergencies, seeking a sustainable power solution, or looking for a portable generator for outdoor activities, propane generators are a versatile and dependable option.


How Long Can a Generator Run on 20 lbs of Propane?

The runtime of a standard 20 lbs propane tank is approximately 5 hours. However, the actual duration will vary based on the specific wattage requirements of the generator.

How Long Will a 1000-gallon Propane Tank Run a Generator?

About two weeks. To estimate the exact runtime, divide the available propane in the tank by the generator's propane consumption rate in lbs/hr. This calculation will provide an estimate of the runtime in hours.

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