Diesel & Portable Generator: How Many Hours Will a Generator Last?

We live in an era where electricity is the life of everything. All of our work gets stuck during the time of power outage. In different situations, when load-shedding occurs, a generator is the easiest solution for most of us.

Now, if you are planning to have a generator for yourself, you might also want to know: how many hours will a generator last? Because you are going to invest a significant amount of money & it is your right to know about the product that you’re going to purchase.

Can You Run A Generator 24/7?

The direct answer to this question is no. Because a generator is an engine-powered device. It needs a break and interval time to run smoothly and efficiently. A generator is run by fuel; when the fuel is on the tank, the generator will run. When the fuel finishes, the generator automatically gets shut down. This is one of the limitations that a generator can’t run 24 hours a week.


There some more factors such as maintenance, engine break time, refueling, etc. limited the time of a generator that it could run without a break. Though the most number of generators can not run 24 hours non-stop, then again, some generators can run 24 hours and even more long hours.

But no generator could run 24 hours continuously in a week without any break. On the other hand, if you find a 24/7 generator, you should not run it much time because it is harmful and dangerous in some cases.

How Many Hours Will A Generator Last?

All of us want to have a generator that will last long because of its high investment. This is why, before purchasing a generator, we all want to know: how many hours will a generator last? Well, the duration of hours or the lifetime of a generator depends on various factors.

How many hours will a generator last

Such as in which purpose you are purchasing the generator, for home or office, the quality of the generator, branded generator, maintenance, etc. Based on these factors, the lifespan of a 50 amp generator to a higher or lower amp generator could vary.

You can find out the actual lifetime of a generator from the warranty and guarantee period of a generator. In this certain period, you can use most of the generator without any interruption. Most of the generator manufacturers provided a two to three years limited warranty.

It means in this certain period; you can easily use your generator. But in reality, the generator will last longer than this if you make sure its proper maintenance. For example, if you use your generator for 600 hours a year, then it could last more than thirty to forty years.

Diesel generator

Most of the diesel generators last, on average, 10,000 to 30,000 hours. But the working hours or the lifetime of a diesel generator could vary based on the maintenance, quality of fuel, and the pressure of loading. It means when you regularly examine & maintain your generator monthly & yearly basis, the duration of its working hour & lifetime will accelerate.

Portable generator

Usually,  a diesel generator can run with a low RPM where a portable gas generator needs more RPM to run. That is the reason the lifetime or working hour of a portable gasoline generator is less than a diesel generator. A portable gasoline generator could run about 2000 to 3000 hours. But the time could increase and decrease based on your maintenance and uses.

Now, we know that different generators have different lifetimes and running hours. Some diesel generators can run 10,000 hours to 30,000 hours, and some portable generator gasoline/ natural gas running generators may last 2000 to 3000 long hours. Sometimes the time duration completely depends on how well we can maintain them, how much pressure we put on them.

Frequently Asked Questions

Before purchasing a generator, we all have some questions. Here in this section, I am going to include some questions and answers that people frequently asked about a generator. Read the section carefully to get an answer if you have the same questions

Can you run a generator overnight?

Yes, you can run a generator overnight. Because most of the generators can run more than 8 hours, and this is enough for running a generator overnight.

How often do generators need to be serviced?

You have to service your generator at least once a year by a professional to keep it functioning. Some simple maintenance could be done by you and those you should frequently do by yourself.

Where is the best place to put a generator?

Placing your generator outside is the best way. Never put your generator indoor, close to your door, window, or any other place where the ventilation system is not adequate.

Final Thought

Every machine has a lifespan that declares how long it will run. Before purchasing a generator, you may look for a query: how many hours will a generator last? Well, this is a very fair question before investing a significant amount of money.

Above in this article, I have explained how many hours different generators are probably run. The well you maintain your generator, the more hours it will give you service.

Affiliate Disclosure: As an Amazon Associate I earn from qualifying purchases.

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