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Articles Informational Topics

How Many Hours Will A Diesel Generator Last? A Calculated Detail

Most modern generators are highly efficient and can run on multiple fuel sources. This new feature allows users to conveniently switch to a different fuel source when the need arises.

how many hours will a diesel generator last

But diesel users may wonder, “How many hours will a diesel generator last?” This article will answer exactly that.

Most industrial enterprises have already committed to diesel generators because of their numerous advantages.

As most generators today are efficient, they can offer more total hours before needing to be replaced.

By putting money into backup power systems, the life expectancy of a generator is a critical detail that needs to be given some thought.

With this review, you may learn about the lifespan of diesel generators.

How Many Hours Will A Diesel Generator Last?

When looking at their lifespan, diesel generators generally run for at least a minimum of 15,000 hours and a maximum of around 50,000 hours before needing to be serviced or even replaced.

The life span of any specific generator will ultimately be affected by several parameters, such as generator size and preventative maintenance methods.

Generators with great maintenance throughout the years might offer an even longer lifespan.

In contrast, generators with below-par care are likely to be retired early due to low performance.

The Maintenance Of The Generator:

Generators that are well-kept, whether diesel, propane, or natural gas, will live longer than a badly maintained one.

So, important to keep your generator regularly if you want it to work for a long time and truly get the most out of its lifespan.

Ideally, it would be best if you did not wait until there’s a power failure to start the generator or do some maintenance.

A generator’s full maintenance means replacing the oil and air filters regularly, as well as monitoring for any decrease in the levels of performance.

Another thing that you can do is to regularly check to see whether your generator emits any unusual noise, movement, or vibration or even burns more fuel than usual.

These symptoms might point to an underlying issue that needs to be addressed that could potentially affect the generator’s lifespan.

Proper Generator Sizing:

This is another factor regarding diesel generators that may be critical in the generator’s lifespan.

Most diesel generators can be run at high loads, up to and including 90% of their total power capacity.

Operating the generator in this way allows for sufficient combustion pressure to maintain the piston rings securely, which further helps ensure the generator’s lifespan.

There is this belief that the larger and more powerful the generator, the better off the company will be. However, this is false.

If you’re purchasing a larger-than-necessary generator, it may reduce the generator’s lifespan.

If you are trying to run the generator at full load, on the other hand, so does not imply exceeding its total power capacity.

As it is obvious, no mechanical machine, be it a diesel generator or perhaps another automatic, electric appliance, will work too well when overworked.

All devices of this sort have the potential to overheat and create catastrophic complications, which may be fatal for the generator and might even significantly reduce the lifespan of the generator.

Types Of Usage:

The total lifespan and durability of a generator are also massively affected by how it is utilized and other loads. Here’s how the sort of usage impacts the health of a diesel generator.

Under Using:

For starters, not utilizing the generator enough might be something that can cause problems as well.

When a generator rests for months at a time, it is typically bound to face issues whenever it is started the next time.

When you utilize a machine that hasn’t been operating in a while, the moving parts in the engine scrape against each other, causing significantly greater friction.

This also implies that every time the machine is utilized, it quickly moves from cold to super-hot, and then it is turned off again and completely cooled down.

The quick temperature swings are quite taxing on the generator. And not just the additional friction.

Being regularly used also avoids oxidation and the degradation of the fuel contained within the generator before usage.


Assume you operate the diesel generator at full power 24 hours a day, seven days a week. Using the generator with so few breaks puts a lot of strain on it.

Overusing can lead to damage and heat-up.

Does Diesel Longer Laster Than Natural Gas Generators?

Indeed, it is true that diesel generators have a significantly greater life expectancy than other types of generators, and it is true because of obvious reasons.

Most diesel generators, for example, possess a simpler mechanism than most of these different generator varieties on the market.

Not only that, but diesel generators also operate at a considerably lower RPM when compared to natural gas or gasoline generators.

Because of these features, diesel generators go through considerably lower stress and strain throughout their life than other types of generators.

And so, as a result, a huge number of natural gas and petrol-based generators age out approximately nine times faster, which, when translated to hours, means a drop in lifespan by approximately 2,000 hours at least.

Other generators are manufactured as a more economical option for people who do not have to use the generator frequently.

But diesel-powered generators, on the other hand, are the obvious and more economical choice for long-term industrial users.


So, putting everything into basic words, the true answer is that the total lifespan of your diesel generator is best determined by how well you have maintained it. If you want it to last longer, make sure it’s the proper size, operate it frequently and properly, and perform any necessary maintenance regularly.
We hope we have adequately answered your question “how many hours will a diesel generator last? And we hope you feel confident with the maintenance tips and symptoms to look out for to maintain the health of the generator better.

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About the author

Anthony Miller

Hello Guys! I am Anthony Miller, a high dynamo, communicative author, and editor of the Renewable Cop, always providing amazing, engaging, informative, unique, highly researched, and verified content based on all sorts of generators. Read more.

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