How Much Propane Does A Generator Use?

How Much Propane Does A Generator Use?

When the power goes out, a generator can be a lifesaver. But how much propane does a generator use? And is it worth the investment? 

it is important to understand how much propane a generator uses. This will help you determine if you have enough fuel stored to last through the outage. Today we will take a look at how much propane is needed to run a generator and some tips on how to conserve energy.

How To Calculate: How Much Propane Does A Generator Use?

Since generators differ in size and power, some run more efficiently than others. Using only as an example, you can estimate that if it runs for 12 hours, roughly 6 gallons would be used. For example, if you have a 500-gallon tank, which can only be filled to 400 gallons, then a full tank would last you around 6 to 7 days.

However, if you use the same tank for longer periods of time (say 3 months), it means that you need to fill up your tank more often than once every week or so. This is because the water will evaporate at an increased rate over time. This is why it is important to check the manual before using it. Some models may require less fuel than others.

It is also important to note that the capacity of the tank should not be taken into consideration when calculating the amount of fuel consumed. The total volume of the tank is what matters here.

How Much Propane Does A Generator Use Per Hour?

Typically, between 1/2 to 1 or 2-3 gallons per hour is used. This varies according to generator size and power demands.

if the generator size is 50kW, 500 liters will be used per hour. If power demands increase to 100 kW, propane consumption increases to around 1000 liters per hour. on the other hand, if power demands decrease to 50 kW, propane consumption drops to around 500 liters per hour. It is important to consider how much propane a generator uses per hour because propane stores are limited. A new generator may use an average of 5 liters per hour, but as the tank empties, the flow rate will slow.

generators, in general, use 5-10 liters of propane per hour. It is important to know how much propane your generator uses per hour to ensure you have enough stored for the outage. power demand also impacts the amount of propane used per hour. If you live in an area where temperatures drop drastically at night, you will use more fuel because your furnace will be running, too.

It is important to know what appliances will be running on a generator and how many hours they may need to run. In addition, it is important to consider how much propane a generator uses during startup. Generators typically use around 2-3 gallons of fuel for the first hour of operation.

How Much Propane Does A Generator Use Per Minute?

 It is unclear how much propane a generator uses per minute. Some sources suggest that a 4000-watt generator will consume approximately .65 gallons of propane per hour, with an average cost of roughly $1.60 per gallon. per minute using of propane generator will be .065 gallons.

How Much Propane Does A Generator Use Per Month?

According to research, if you run a 7000-watt generator, you will use about 55 gallons per month.

While propane is typically measured in gallons, it can also be measured in BTUs. One gallon of propane contains 91,500 Btu. That means the 7000-watt generator has the potential to use about 6,535,000 Btu of propane per month.

How Much Propane Does An Average Generator Have?

This is a complicated question to answer. Depending on the size, it can hold between 1 to 20 gallons of propane. In general, small units hold about 5 gallons and larger ones hold around 20 gallons.

How To Choose The Right Size Propane Generator For Your Needs?

Generally, the bigger size generator, the more fuel it consumes. So if you plan to use your generator for long periods of time or on a regular basis, opt for a model with an hourly rating between 7-10 Hp/kW. Keep in mind that above 10 kW may require special propane tanks and have less portability and convenience than smaller models.

The following table can be used as a rough guide:

Generator size in kW– (One kW is equal to 1000 watts of energy) which is represented as kW (kilowatt generator)

1 kW – roughly 6 hours

2 kW – roughly 3 hours

3 kW – roughly 2.5 hours

4-5 kW – roughly 1.5 hours

6-7 kW – roughly 1 hour

10 kW and above – roughly 45 minutes to 1 hour.

and a 20kW generator can run for eight hours.

The more power you need, the more fuel you will use. For example – If 6 kW/8 hp and you operate it for 2 hours per day, you will consume roughly 120 gallons of propane every month.

Some models can be run on gasoline. However gasoline-powered generators are more expensive to buy, they create air pollution and require routine maintenance. So if you can afford propane, it is recommended to get a propane generator.

Propane generators are clean, efficient, and quiet. They do not require spark plugs or oil changes. You won’t have to spend time fueling them, cleaning them, or maintaining their emissions systems.

Types Of Generators And Their Propane Usage

The size and type of generator will determine how much propane is needed to operate it. Larger size with higher power requirements uses more propane than a smaller one with less power.

If you are looking to power up your home or campsite, then there are multiple different types of generators. Understanding propane usage is important to ensure you have enough fuel stored going into a long-term outage.

Generators are categorized by power output in watts. This is measured by multiplying volts by amps.

800-1000 Watt Standby Generator – Uses about 1 gallon of fuel every 10 hours

1500-2000 Watt Standby Generator – Uses about 1.5 gallons of fuel every 8 hours

3000 Watt Standby Generator – Uses about 2 gallons of fuel every 6 hours

Fuel usage varies by model and make. These are general guidelines according to manufacturers. It is important to read the owner’s manual for more details.

Once you have determined what size generator you need, the next step is to determine how much propane will be needed to power the generator. It is important to know how many hours you will need your generator in case of an outage. For example, if you are trying to live comfortably through a hurricane, you will need your generator for 4-5 days. Generators are measured in watt-hours which is the amount of wattage needed for one hour.

Tips For Conserving Propane While Using A Generator

 Here are some tips to conserve propane.

-Turn it off when it’s not in use

-Use it only when necessary and shut off the appliance if you leave your home

-Plug appliances directly into a wall outlet, even if it is temporary

-Ceiling fans use very little power

-If you are using your generator with an electric stove, be aware that it can consume more propane than other appliances

-Turn off the propane tank valve. If it is accidentally turned on, your generator can run out of gas very quickly.

-Remove the battery from a car or truck if you are using a generator to run the vehicle ignition system. This can save propane.

What Are The Benefits And Disadvantages Of Using Propane Over Other Types Of Generators?


A propane generator is easy to start, which makes it great for elderly people or those with limited mobility. It also runs quietly, so you won’t bother your neighbors while running it during an outage. And finally, because propane is fueled by liquid gas instead of gasoline, there’s no risk of polluting the air around your home.


There are only a few disadvantages of propane versus other types. Because they are fueled by liquid gas, propane is more expensive throughout the lifetime of ownership than other types, even though they also produce more power on average. And because it takes some time for them to warm up before running, you can’t use them during quick power surges.

Tips For Maintaining Your Propane Generator So That It runs Efficiently:

  1. Always ensure the propane level is sufficient and that there isn’t any air in your tank before powering. 
  2. Ensure that all vents and windows are closed when the generator is running to reduce energy use.
  3. If you have a heat pump, make sure it has been completely cooled down before starting the generator.
  4. Ensure that your gas tank is at least half full before powering on your generator so you use less fuel.
  5. Use a carbon monoxide detector when the generator is running indoors to ensure there isn’t any leakage in the propane gas. propane gas is a colorless and odorless gas, so it’s important to use a carbon monoxide detector.
  6. Only refuel if your tank is below half and you will be running for an extended period of time.

Related FAQs

How Many Gallons Of Propane Will Use In An Hour?

The amount of propane used per hour can vary depending on the size and type of generator you have. Generally, the larger get the more fuel it consumes. However, there are things that can be done to conserve propane. For example, if you have a current time of 0:00 and a load of 50%, you would be using 5 horsepower to generate 2500 watts of power. 5 horsepower x 10,000 BTUs would consume 50,000 BTUs per hour.

Which Is More Cost-Effective To Operate Gasoline Generators Or Diesel Fuel,  Propane-Powered Generators?

When purchasing a new standby generator, you might feel confused about your options for a fuel source. When it comes to fuel costs, the answer is that each has its own pros and cons. Propane typically provides more power than gasoline with fewer emissions, but it is more expensive. For example, at $2.99/gallon (the current national average), you can expect to pay about $0.22 per kWh on electricity produced by gasoline. Propane, on the other hand, would cost $0.34/kWh and on diesel fuel, it’s $0.18/kWh
Diesel generators are widely used in industry because diesel is the greatest fuel for working in remote areas or extreme climates.

How Much Propane Will My Portable Generator Use?

A 20-pound propane tank with 4.7 gallons of propane when full powers a generator that weighs 38 pounds. If you don’t want to commit to one energy source, the best dual fuel is always available. Gasoline is the most popular power source for portable generators since it is easily accessible and convenient thanks to local gas stations.

Comparison Between Propane And Natural Gas Generators?

A generator that runs on natural gas line will use far less propane. Natural gas is the most popular fuel used for generators today. With this type of fuel, you can expect to use about a 1-gallon tank of propane per hour.

How Many Pounds Of Propane Are There In A Gallon?

A gallon of propane contains about 91 pounds.

How Much Do Pounds Of Propane Weigh?

One pound of propane contains 8.3 ounces of propane.

How Many Pounds Per Gallon Of Propane Does A Generator Use?

To figure out how many pounds of propane is needed to run your generator, you will need to know the wattage of your generator.
The number of watts a generator draws is measured in surge watts and continuous watts.
Surge watts: The maximum power the generator can draw at any given moment. To determine how many watts a generator uses you will need to know what items are being powered by the generator.
Continuous watts: This is the average amount of power needed to run your items when using the generator. This number will be able to give you the average amount of watts your generator will use.

How Much Energy Does A Pound Of Propane Produce?

A pound of propane produces 21,500 BTUs.

How Many Hours Of Gallon Propane Tank Are In A 20 lb?

A 20-pound propane tank contains roughly about 44 hours of use.

How Much Propane Does It Take To Power My Generator?

The amount of propane you will need to fuel your generator depends on the size of the generator.

Are Propane-Powered Generators The Best Choice?

Not necessarily. While it may be one of the more affordable options, propane generators also have their downsides. For instance, there is no guarantee that the generators will run at all times, but propane is still a better option than gasoline. There are also limits to how big propane generators can be.

How Long Will A 22kW Generator Operate On Propane?

A typical 22kW generator will operate for about 4 hours on 1-1/2 gallons of propane.

How Long Does A Propane Tank Of 500 Gallons Last?

A 500-gallon propane tank would last a homeowner anywhere from 3 to 5 days during emergency conditions. During normal usage, the same-sized tank would last approximately 5 weeks.


The amount of propane your generator uses is going to depend on the size of your generator. When you use a generator, it is important to conserve the propane you have. Try using your generator only when necessary and avoid running it for long periods of time. Remember that keeping your generator in good condition is important.

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