Portable Generators are basically internal combustion engines that convert rotational mechanical energy to electrical energy. For the engines to operate and run, you need to supply fuel. Speaking of fuel, the two most common types of fuel for small and medium-sized generators are Propane and Gasoline. Natural Gas is also a good choice while Diesel fuel is more common in large commercial generators. As homeowners, you have to invest a lot in fuel if you plan to run the generator for extended periods. Now, the important question is how much propane does a generator use? Similarly, if you have a gasoline generator, then you will wonder how much gas does a generator use.
In this guide, let us find answers to these questions. First, we will discuss some essentials about propane and gasoline such as how much energy they contain. Later, we will see some numbers associated with the two questions “How much propane does a generator use?” and “How much gas does a generator use?”.
We will also take a look at the efficiency of propane and gasoline generators and understand which type of generator is a better choice.
Different Types of Generator Fuels
Home backup generators can run on a variety of fuels. Let us see some common types of fuel that we use in portable generators.
Gasoline
Gasoline is the most common fuel used in portable generators. It is readily available and easy to store, but it has a relatively short shelf life and can be dangerous if not stored properly.
Diesel
Diesel is a popular choice for larger stationary generators. It is more fuel-efficient than gasoline and has a longer shelf life. However, diesel generators are generally more expensive to purchase and maintain than gasoline generators.
Propane
Propane is a clean-burning fuel that is less volatile than gasoline or diesel. The best thing about propane is you can store it for long periods without degrading it.
We will see more about propane in the later section but generally, propane generators are quieter than gasoline or diesel generators.
Natural Gas
If you have a large standby generator, then chances are you use natural gas as its fuel. It is a clean-burning fuel that is less volatile than gasoline or diesel and is generally less expensive than propane.
The choice of generator fuel will depend on a variety of factors, including the intended use of the generator, the availability of fuel sources, and the specific requirements of the user.
A Brief Note on Propane and Gasoline
Let us take a closer look at the two main types of fuel for small portable generators. Gasoline and propane are both common fuels used to power generators, but they have some key differences.
Propane
Propane is a colorless and odorless gas that belongs to the family of hydrocarbons. It is a three-carbon alkane with the molecular formula C3H8. Some common applications of Propane are fuel for heating, cooking, and transportation.
We also use propane as a refrigerant and in some industrial processes. Propane is a byproduct of natural gas processing and petroleum refining.
Generally, we store and transport propane as a liquid under pressure as this is an efficient way. When we release propane from a pressurized container, it vaporizes and becomes a gas.
Propane is a clean-burning fuel that produces fewer emissions than other fossil fuels like coal or oil. It is also relatively safe, as it has a narrow range of flammability and is not toxic.
However, like any combustible fuel, we should handle and use it with care to avoid accidents or injuries.
Energy in Propane
Propane is a type of fuel that contains energy in the form of chemical bonds between carbon and hydrogen atoms. When we burn propane (usually as fuel), these will break and release energy in the form of heat.
The amount of energy contained in propane can vary depending on factors such as its purity and the conditions under which it is burned.
On average, a gallon of propane contains approximately 91,500 BTUs (British Thermal Units) of energy.
It’s important to note that the actual amount of energy that can be obtained from propane can vary depending on the efficiency of the equipment used to burn it.
Factors such as the design and condition of the burner and the amount of air used during combustion can all affect the amount of energy that is ultimately obtained from a given quantity of propane.
Gasoline
Gasoline, also known as petrol, is a volatile, highly flammable liquid. It is a mixture of hydrocarbons, typically containing between 8 and 12 carbon atoms per molecule. The exact composition of gasoline can vary depending on the source of crude oil and the refining process used.
One of the main applications of gasoline is fuel in internal combustion engines. Several small automobiles such as motorbikes, cars, and trucks use gasoline as fuel. Apart from automobiles, we also use gasoline in boats, motorcycles, and lawnmowers.
It is a convenient fuel because it is easy to transport and store. As it is a liquid, you can easily pump it into a vehicle’s fuel tank.
Gasoline is produced by refining crude oil. This involves separating the various hydrocarbon components through a process called distillation. The resulting mixture is then treated with various chemicals to remove impurities and improve its performance as a fuel.
Gasoline is highly flammable and can be dangerous if not handled properly. We should always store it in a well-ventilated area, away from sources of heat or flame. If there is a spill, you should clean it up immediately to prevent fires or other hazards.
Additionally, gasoline fumes are toxic and can cause health problems if inhaled in large quantities.
Energy in Gasoline
Gasoline is also a type of fuel that contains energy in the form of chemical bonds between carbon and hydrogen atoms. When we burn gasoline, these bonds will break and release energy in the form of heat.
The amount of energy contained in gasoline can vary depending on factors such as its purity and the conditions under which we burn it.
On average, a gallon of gasoline contains approximately 114,000 BTUs (British Thermal Units) of energy.
It’s important to note that the actual amount of energy that can be obtained from gasoline can vary depending on the efficiency of the equipment used to burn it.
The design and condition of the engine, the load it is powering, and the driving conditions can all affect the amount of energy that is ultimately obtained from a given quantity of gasoline.
How Much Propane Does a Generator Use?
The amount of propane used by a generator depends on several factors, including the size of the generator, the load being powered, and the runtime of the generator.
However, as a rough estimate, a 10-kilowatt generator running at 100% load may consume around 2.2 gallons of propane per hour.
It’s important to note that different generators have different fuel consumption rates, and the actual usage will also depend on the specific model and brand of the generator.
If we take the same example of a 10,000-Watt Generator, then you need about 50 gallons of propane to run the generator continuously for 24 hours at 100% power output.
The efficiency of Propane Generators
The efficiency of propane generators can vary depending on several factors, such as the specific model of the generator, its operating conditions, and how well it is maintained.
In general, propane generators are considered to be highly efficient because propane burns more cleanly than gasoline or diesel fuel.
Propane also has a higher energy content per unit of volume than gasoline or diesel fuel. This means a propane generator needs less fuel to generate the same amount of electricity.
You can further improve the efficiency of a propane generator by using an appropriately sized generator for the load it is powering.
Additionally, regular maintenance of the generator according to the manufacturer’s recommendations can also improve its efficiency. The common maintenance tasks are cleaning or replacing air filters, oil changes, and replacing the spark plug.
How Much Gas Does a Generator Use?
Similar to propane generators, the amount of gasoline used by a generator depends on several factors, such as the size of the generator, the amount of load, and the runtime of the generator.
However, as a rough estimate, a 10-kilowatt generator running at 100% load may consume around 2 to 3 gallons of gasoline per hour.
It’s important to note that different generators have different fuel consumption rates, and the actual usage will also depend on the specific model and brand of the generator.
Additionally, you have to use gasoline-powered generators in well-ventilated areas and according to the manufacturer’s instructions. This is because gasoline is a flammable liquid and can be dangerous if not handled properly.
If you want to run a gas-powered generator continuously, then you may want to know how much gas it consumes in a day.
Using the numbers from the previous statement, we can assume that you need around 50 to 70 gallons of gasoline to run a gasoline generator for 24 hours at 100% power output.
The efficiency of Gasoline Generators
Make and model, operating conditions, and maintenance history all determine the efficiency of a gasoline generator.
In general, gasoline generators are less efficient than propane generators because gasoline has a lower energy content per unit of volume than propane.
This means that they need more fuel to generate the same amount of electricity. Additionally, gasoline generators tend to produce more emissions and noise than propane generators.
You take a few measures to improve the efficiency of gasoline generators. First is to select the generator with the appropriate size as per the load you want to power.
Additionally, regular maintenance such as cleaning or replacing air filters, changing oil, and spark plug replacements can help to ensure that the generator is operating at peak efficiency.
Using higher-quality gasoline can help to improve the efficiency of the generator.
Propane Generators vs Gasoline Generators
The main differences between propane and gasoline generators include the type of fuel, fuel efficiency, cost, and emissions.
One of the main differences between gasoline and propane is their energy content. Propane has a higher energy content per unit of volume than gasoline.
What does this mean? This means that you need less propane to generate the same amount of electricity as gasoline. This can make propane generators more fuel-efficient and cost-effective in the long run.
Another important point to note between gasoline and propane is their emissions. Propane burns more cleanly than gasoline. As a result, it produces fewer emissions and pollutants.
This can make propane generators a better choice for use in areas with strict emissions regulations or for those concerned about air quality.
However, gasoline is more widely available than propane. This makes it a more convenient fuel option in many cases. Gasoline generators are also typically less expensive than propane generators.
So, if you are looking for a more budget-friendly choice, gasoline generators are the main option.
Ultimately, the choice between gasoline and propane will depend on many factors, including the specific needs of the user, the availability of fuel, and local regulations and requirements.
Difference Between Propane Generators and Gas Generators
Fuel Type and Efficiency
Propane generators use propane gas as their primary fuel source, while gasoline generators use gasoline. Propane generators are generally more fuel-efficient than gasoline generators. Propane has a higher energy content per unit of volume than gasoline, which means that less propane is needed to generate the same amount of electricity as gasoline.
Cost
Propane generators are generally more expensive than gasoline generators. The initial cost of a propane generator can be higher due to the cost of the generator itself and the additional equipment needed to store and distribute propane.
However, propane may be more cost-effective in the long run due to its higher fuel efficiency.
Emissions
Propane generators produce fewer emissions than gasoline generators. Propane burns more cleanly than gasoline, producing fewer emissions and pollutants.
Availability
Gasoline is more widely available than propane, making it a more convenient fuel option in many cases.
Ultimately, the choice between a propane generator and a gasoline generator will depend on a number of factors, including the specific needs of the user, the availability of fuel, and local regulations and requirements.
Which One to Buy, a Propane or Gasoline Generator?
The choice between a propane or gasoline generator depends on several factors, including your power needs, cost, and availability of fuel. Here are some considerations:
Determine how much power you need to run your appliances and devices. Propane generators generally have lower wattage output than gasoline generators, so they may not be suitable for heavy-duty power needs.
Consider the availability of fuel in your area. Propane is widely available in tanks, but you may need to have them refilled or exchanged. Gasoline is available at gas stations, but it may be hard to get during emergencies.
Compare the cost of propane and gasoline generators, including the initial purchase price and ongoing fuel costs.
Gasoline generators are generally more portable than propane generators, as propane tanks can be heavy and bulky.
Propane generators are generally quieter than gasoline generators.
In general, propane generators may be a better choice if you have lower power needs, want a quieter option, or have access to affordable and convenient propane.
Gasoline generators may be a better choice if you have higher power needs, need a more portable option, or prefer to rely on gasoline, which is widely available at gas stations.
Conclusion
Propane and Gasoline are two popular choices of fuel for portable and standby generators. If you mainly use a generator only during emergencies, then you might not worry about its efficiency and the amount of fuel it burns.
But if you use a generator very frequently and regularly, then you have to know how much fuel it needs. The obvious questions are “how much propane does a generator use?” and “how much gas does a generator use?”.
In this guide, we saw the basics of propane, gasoline, and their energy contents. Then we saw a generic answer to the question of how much propane does a generator use and how much gas does a generator use.
After that, we compared propane generators and gasoline generators and listed out some important points to consider while choosing the right type of generator.
We hope that this guide on propane and gasoline consumption by generators could help you understand more about generators and their fuels in general. If you feel we missed something or want us to add anything, do let us know in the comments section below. It will not only help us but also other readers.
