In this age, electricity is needed for essentially everything to work properly. This is why having a generator is crucial in case of a power outage. Imagine how stressful it would be to live a day without power!

Portable generators that run on gasoline are extremely common, and they also tend to do their job well. If you are reading this article, then chances are your house also has a gasoline-run generator.

A very important factor with generators is their running time, so today, we will be discussing how long will a 5500 Watt generator run on a tank of gas.

Let’s get started.

How Long Will a 5500 Watt Generator Run on a Tank of Gas?

The running time of a 5500-Watt generator on a tank of gas can vary a bit depending on how much load you put on the generator as well as the size of the tank. To break it down for you, a higher load means that higher power is produced by the generator. Thus, the runtime will be decreased.

Generally, a 5500-Watt generator at the half load will run for about 11 to 13 hours on a tank of gas. Gas tanks are usually about 5 gallons, so if you were wondering how long will a 5500 watt generator run on 5 gallons of gas,  the answer is around 12 hours.

Letting Your Generator Run Continuously All Night

Since you will be able to run a 5500 Watt generator for approximately 12 hours on a tank of gas, you may think of letting the generator run for the whole night continuously. Although this is something that is very much possible, we would suggest you turn your generator for a bit to let it cool down for safety reasons.

Another thing you might want to keep in mind when letting your generator run overnight is its Carbon Monoxide emission. You may know that this is a colorless gas that is very toxic and can be fatal at high concentrations. If you are fixed on having your generator on all night, you should definitely purchase a CO detector. This detector will beep when it detects the presence of Carbon Monoxide in the air.

One last thing we must tell you about leaving your generator all night is that the noise will be an annoyance when you are trying to fall asleep. However, you will face this issue if your generator is a quiet generator.


Generators for Household Use

Like most devices, generators have different varieties, and you must buy the right one because not all generators will fit your needs. If you are living in a standard-sized family apartment, for context 2000 square feet, you must be wondering how much is a generator for a 2000 square feet house? To be fair, using the size of your house is not the right way to estimate what generator you will need; it actually depends on the power of the devices you will be using with the power produced by the generator.

Just for a rough estimate, a house of 2000 sq ft can be powered by an 11kW generator if only the essential appliances are powered. However, if one wishes to power all their appliances, a 25kW generator would certainly be a better option.

For people who have central AC, a lot of the power from the generator will be directed towards that appliance. If we were to put a number on it, we would say that about 5000W would be needed. On the other hand, single AC units take up much less power.

Now, how big of a generator does a regular AC like the 5000 BTU air conditioner need? You will need a small generator of 500W to run the 5000 BTU; a generator like the Jackery 500W would be a fantastic choice if you were looking for recommendations.

Running Generators on Propane

Using propane tanks for your generator can actually come with a few perks. The first one is that you can use propane generators continuously for a longer time than gasoline-run generators without bringing up any issues.

Interestingly, you can connect tanks of propane in series with your generator, so when one tank is empty, the generator doesn’t have to stop operating even for a moment.

Now, let us address the real concern: how long will a generator run on 5 gallons of propane? Well, again, as we saw with gasoline-run generators, this duration depends on the load on the generator

However, if we were to give a rough estimate, we would say that you would get around 10 hours of power from 5 gallons of propane.

One thing you must keep in mind while using propane generators is that after about 100 hours of running, the generator will need some maintenance.


Generators are essential devices these days, especially if you live in an area where you have frequent power outages. It is also very important for you to know how long will a 5500 watt generator run on a tank of gas, so you know what preparations you have to take in case of a power outage.

We would request you to use your generator with proper maintenance and definitely avoid leaving it running overnight. We hope you are able to keep your lights on at all times and stay safe!

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