What Is Your Generator Worth? - MacAllister Power Systems

Author: Daisy

Aug. 25, 2025

Machinery

What Is Your Generator Worth? - MacAllister Power Systems


Whether you’ve been using your commercial generator for a few years and need to upgrade to a new system or want to get rid of one you no longer use, determining its value can help you ensure the best price. However, many elements will influence the price of what your unit is worth.

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Depending on the model you have and how well you’ve maintained it, it could be worth much more or less money than you anticipate. Other influences, such as age, size and brand, can also boost or lessen the value of your system. In this article, we’ll go through the different factors that can impact the value of your commercial generator and how you can use them to calculate an estimation of its value.

1. Age and Hours Used

If you’re looking to sell your generator, the most important factor is that it runs and performs well. If your generator meets that criteria, the next thing you should consider is its age. The older it is, the lower its overall value will be.

For this reason, it’s important to consider the manufacture date, specifically if your generator was built before . Generators built before this year may not be able to meet the emission regulations set by the Environmental Protection Agency’s (EPA) Tier Rating System. On a scale of one to four, generators are scored by emission quality, which can help determine a generator’s overall worth.

The higher the tier, the better the quality. Most generators built after must adhere to the highest standards, Tier Four. Some states won’t allow you to disconnect and reinstall your generator in another state if it doesn’t meet these regulations, making it more difficult to sell and lowering its value. However, even if your generator was built before , you can still sell it in a few states.

To get the maximum value from your generator, you’ll want to consider how many hours you’ve used it. Check the hour meter to see the hours of operation, which will help you determine how much it could be worth. Essentially, the lower the hours, the more valuable your generator is.

For comparison, it’s common to see an average standby generator with under 1,500 hours. Under 100 hours for a standby generator is considered very low. Continuous or prime power generators hold the most value when they are under 5,000 hours. Most continuous or prime power generators over 15,000 hours will need to be rebuilt which can be a costly venture. Something to consider is sometimes your hour reading on your control panel may not be accurate; you may have to get a technician to connect to the generator to verify this.

2. Fuel Type

The next thing you’ll want to consider is the type of fuel your generator uses. This is an important aspect because the type of fuel can determine how efficient your generator is and how much it would cost to operate on average. There are a few types of fuel for generators, each with their own pros and cons:

Diesel

Here are some characteristics of diesel that could influence your generator’s value:

  • Lifespan: Diesel generators tend to last longer than others because of their simple design and durability. They require fewer parts to maintain and repair, resulting in lower costs.
  • Flammability: Diesel gas is less flammable than other fuel types, which makes diesel generators a bit safer and easier to manage if there’s a spill.
  • Fuel supply: With diesel generators, you can rely on a steady fuel supply with minimal interruptions.

Natural Gas

Here are some advantages of natural gas that could influence the value of your generator:

  • Fuel efficiency: Natural gas is very efficient, which can help you save on fuel costs.
  • Noise: Natural gas generators are usually much quieter than other units, such as diesel. The amount of noise your generator produces can also be a factor determining its value.
  • Exhaust: Natural gas is one of the cleanest fossil fuels and is almost entirely odorless, while others produce a strong smell and exhaust.

Gasoline

Gasoline is a common type of fuel that’s ideal for efficient and reliable use. Here are some other advantages of gasoline generators:

  • Noise: Gasoline generators are relatively quiet, which is useful in applications with no sound insulation.
  • Cost: This type of generator is often more affordable in the long run because of its efficiency, which also makes it attractive to buyers.
  • Size: Gasoline generators are generally lightweight and easier to move because they tend to be smaller in size and more compact.
  • Versatility: These generators can be used for different construction and on-site jobs. Their versatility allows them to be useful in various applications, which can boost their value.

Dual Fuel

Dual fuel generators have their own advantages that may be an excellent fit for another company. These benefits include:

  • Efficiency: When it comes to burning fuel, dual fuel generators use a mix of two fuel types that adjust to make up for any imbalances to generate power safely.
  • Versatility: There are many types of dual-fuel engine generators, giving you more of a selection.
  • Cost: Though dual fuel generators are usually more expensive, they tend to provide more cost-effectiveness over the long run than single fuel generators.
  • Environmental impact: These types of generators are an eco-friendly alternative because they have a highly efficient engine that produces fewer carbon emissions.

3. Size

The size of your generator is the next factor to consider when determining how much your generator could be worth. Generator size varies from watts (w) to kilowatts (kW), which measure the electrical output of the equipment. Here’s a breakdown of what these units of measurement mean in comparison to the size of your generator:

  • Less than 20kW: Too small for most generator dealers
  • 20kW-100kW: Medium
  • 100kW-500kW: Large
  • 500kW and above: Extra large

There are also generators measured in megawatts (MW), which equals 1,000 kW, about the size of a tractor-trailer. Usually, the smaller the generator, the smaller the power output, and the bigger the generator, the more it could be worth. This means that the size of your generator can have a significant impact on its value. Keep in mind that most generator dealers aren’t interested in generators under 20kW.

4. Quality and Condition

While many elements can influence your used generator’s value, the condition, brand and quality of your equipment can be some of the first things dealers look for to determine its worth. If it takes a while to power up your generator, or you can’t do so at all, it can be an indicator that your generator has very low value.

However, if it does power up and runs smoothly, the next thing a potential buyer will look for is its overall condition and brand. For example, a generator from a well-known, quality brand will be easier to price and sell than a generator from an unknown or less established brand. Overall, the name on your generator will hold weight regarding its value.

If you perform regular maintenance and upkeep on your generator, it’ll likely run better than those that have worn-out parts or mechanical failures. The condition of your generator is vital because it lets your dealer know how long the unit will last and how it’ll perform after purchase.

For instance, if your generator is covered in rust or was continually exposed to the elements, such as rain or heat, it might affect its quality. If your generator has been serviced and kept indoors when not in use, it could mean significantly higher value.

The physical condition of your used generator will give generator dealers clues about what your generator was used for and how well you maintained it, which can either improve or diminish the amount your equipment is worth.

5. Market Value

Another factor to consider is comparing your generator to the market value to help determine how much it could be worth. For example, if you see a similar generator for sale online — perhaps even the same make and model — you can get a better idea of how much your generator might sell for. It’s a good idea to do your research and look around for listing prices of generators that share common characteristics. Voltage, number of leads, power rating, brand, enclosure, mobility, and other factors play a large role in determining the value of a used generator.

Just like selling a used car you will have a trade in value, private party value, and retail value. Retail value is what you are seeing in the open market. To get full retail value, you would have to spend several thousand dollars in maintenance, have a certified technician look over the unit, and have a strong reputation selling used industrial generators in the marketplace. In general, you should not expect to get more than 60-70% of the retail value of a generator.

6. Decommissioning and Removal

Finally, decommissioning and removal services will also factor into your commercial generator’s value. Most commercial generators will need some level of decommissioning and removal. Some factors to consider during these services include:

  • Geographical location
  • Location of the generator on your property
  • Building and removal expenses

While it’s one thing to find an interested buyer or dealer for your generator, it’s another to move and transport it to the next location. For example, if your generator is in a hard-to-reach spot, such as a rooftop or on rough terrain, the cost of decommissioning and removal will be higher, which would result in a lower value for your generator.

Most larger generators require a crane and truck, which can be costly. This is why you can end up taking a loss on the initial price of your generator. Because commercial generators are often used in warehouses or facilities as primary or backup power sources, they’re attached to complex systems. Some of these components are even regulated by specific laws, meaning you must move and dispose of them properly to avoid a potential fine.

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Contact us to discuss your requirements of Kw Generator. Our experienced sales team can help you identify the options that best suit your needs.

In addition, improperly moving or disposing of any part of your commercial generator can cause environmental damage. Exposed wiring or fuel leakage occurring during the removal or transportation process can pose extreme danger and affect the integrity of the electrical connections that power the generator.

When moving the generator, there are many steps to disconnect the equipment from the installation site. Once it’s moved to the new location, new connections will be established along with any required updated labels. This type of job requires proper decommission to get it from one facility to another in a legal and safe manner, which is why it’s crucial to rely on professionals and experts.

Other services that might need to be performed when moving your generator include removing the old fuel and attending to any other electrical concerns, which require experienced electricians. This is often the reason that these services will be deducted from your profit, so it’s important to keep that in mind when estimating or calculating how much your generator is worth.

Get a Free Appraisal With MacAllister Power Systems

As you can see, various factors contribute to the value of your generator. Though having an old or damaged generator can make it difficult to sell, each factor varies widely in how they affect your price. By going through a trusted source with a reliable reputation when selling your generator, you can get the best value possible.

Best Generator Buying Guide - Consumer Reports

To test generators for performance, our expert engineers load each model with various essentials you might want to power during an outage, like a space heater, refrigerator, or window air conditioner. We make sure the generator can handle the load it promises and also determine what happens when a sudden spike in voltage hits, like what would happen if the compressor in your refrigerator kicked on when the generator was already close to capacity. The best models take that in stride, while others bog down or even quit. 

We also consider how easy it is to move and use a generator, how efficiently it uses gasoline or other fuel, and how long it runs on a single tank.

We run each generator through a variety of scenarios designed to capture the ways in which a consumer might inadvertently misuse a generator to test for safety. We conduct these tests in a custom-built facility on the grounds of our Yonkers, N.Y., test facility. Our test chamber is wired with calibrated carbon monoxide sensors, and we record CO levels throughout the container when a generator is on, noting how quickly each generator turns off when the levels become potentially dangerous. 

Finally, to reduce the risk of carbon monoxide poisoning, many portable generators feature a built-in sensor that triggers an automatic shutoff if CO builds up to dangerous levels in an enclosed space. Some also have engines that emit less CO in the first place. 

Recent test data from CR shows that this safety feature is likely to save lives, and we’ll only recommend portable generators that pass our expanded CO safety technology test.

Choosing the right home generator means figuring out what size generator you need first. Generators are sold by power output, measured in watts. The amount of power a generator delivers determines how many electronics and appliances you can run at once; figure on about 5,000 watts for a typical home. The delivery and quality of power determine how well a model will power your home. A generator with a high output that struggles with power delivery or quality might stall or trip a circuit when it’s bogged down.

Before you look through our generator ratings for the best generator for your home, make a list of the devices you’ll need when the power’s out. Then add up wattages to get you in the right ballpark. 

Here are some rough wattage estimates for common essentials as you build out your list:

  • Refrigerator: 600 watts
  • Sump pump: 750 to 1,500 watts
  • Portable heater: 1,500 watts
  • Window air conditioner: 1,000 watts
  • Lights: 5 to 80 watts (per bulb)
  • Computer: 60 to 300 watts

Don’t let rain, snow, or wind keep you in the dark. Look for these options to get a generator that’s safe, reliable, and tailored to your power needs.

Automatic CO Shutoff
This critical safety feature automatically shuts down a generator’s engine if a built-in CO sensor detects that the deadly gas has reached certain levels. We have over a dozen generators in our ratings with a CO safety shutoff. (CR only recommends portable generators with this feature.)

From Generac to Honda, more brands than ever offer options with this technology—you might see them advertised with marketing terms like “CO Guard” or “CO Protect.” But the only way to verify whether a generator meets one of the two standards is to look for one of these certifications on the packaging:

• ANSI/UL Certified for Carbon Monoxide Safety
• ANSI/PGMA G300 Certified Safety & Performance

Low-CO Engine
Brands including Ryobi and Echo are using a low-CO engine to guard against carbon monoxide poisoning.

Automatic Start
When the power goes off, the generator automatically starts—without you lifting a finger. This is great if you travel a lot or work far from home, and can’t always get there quickly in an emergency.

Electric Start
Several portable models offer electric start, a push-button alternative to the hassle of pull-starting the engine. If the battery is not included, make sure you factor in the added cost (around $50). Stationary models have automatic starting.

Alternative Fuel Capacity
Most portable models run only on gasoline, though some come equipped to run on a propane tank or natural-gas line and others can be converted with kits.

Fuel Gauge
You may appreciate glancing at a fuel gauge to determine what fuel is left in your portable generator, especially during blackouts.

Low-Oil Shutoff
If oil falls below minimum levels, the generator shuts down to prevent engine damage. While this feature is standard for stationary generators, it’s increasingly common on portables.

Multiple Outlets
Four or more outlets on a portable generator let you best use the wattage by spreading the load, though we recommend using these for only a few devices at home, or for when you’re away—at, say, a campsite. See the next section on transfer switches.

Removable Console
A removable console connects to the generator so that you can plug in appliances without running (potentially risky) extension cords outdoors.

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