Generator Sets For Sale

New or Used Generators (Gen Set) by Owners and Dealers

Shop new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Filter by hours, price, or year to target the features you need.
Generator sets, also known as a "gen set", can provide power to any job site that is not connected to grid, needs an emergency supply, or wants to perform peak shaving. The generators come in various sizes and power ratings. The fuel type of the generator may be diesel, gasoline, or natural gas, and they may be trailer-mounted, mobile, or stationary. If you're looking for just a power unit, browse our industrial power unit section.
Your Current Search
Industry
Industrial Equipment
Category
Generator Sets
Click the to remove the filter.
Narrow Your Search
Keyword Search
Search within the selected criteria
Equipment Type
Industrial Equipment (2056)
Category
Generator Sets (2056)
Model
Select a manufacturer to view available models.
Condition
Model Year
-
Fuel Type
Horsepower
-
Inspection Report
Warranty
Price
-
Country
State / Region
Select a country to view available states.
Seller Type
Market Type

Shop Generator Sets by Brand

Quick Filters

Showing 1 - 25 of 2,056 Generator Listings

1 - 25 of 2,056 listings
1 - 25 of 2,056 listings
Featured Item
Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!
20 1

Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!

$20,000 USD
FREE SHIPPING! (to most US states) NEW! Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NOW OFFERING EASY BUSINESS OR PERSONAL FINANCING! WE TAKE...
ConditionUsed
Usage2 Hours
Stock NumberTC1025472104DS200
MLS Number13953991
CategoryGenerator Sets
Last Updated11/22/2025
Location
Orem, UT, US
Sold By
Global Remarketing
Caterpillar XQ350 Mobile Power Module Generator Set
5 0

2014 Caterpillar XQ350 Mobile Power Module Generator Set

Recently Updated
$179,100 USD
2014 CAT XQ350 T4I, ABC, C13 ENGINE, CAT EMCP 4.2 CONTROL PANEL, DUAL VOLTAGE, GENERATOR END, NEW CONTROL PANEL, Online Owner's Manual, PORTABLE GENERATOR SET, ZERO HOUR REBUILT ENGINE AND,...
ConditionUsed
Usage1 Hours
Stock NumberXEU0009
MLS Number12804873
CategoryGenerator Sets
Last Updated11/30/2025
Location
Topeka, KS, US
Sold By
Foley Equipment
Caterpillar 3512 Generator
12 0

1986 Caterpillar 3512 Generator

Recently Updated
$132,294.05 USD
3 POLE CIRCUIT BREAKER, 60 HZ, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, EMCP 4.2 CONTROL PANEL, NO ENCLOSURE, Online Owner's Manual, Package Type Dealer Packaged Unit,...
ConditionUsed
Usage1,500 Hours
Stock NumberE220008M
MLS Number11814956
CategoryGenerator Sets
Last Updated11/30/2025
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
Caterpillar 3512 Generator
11 0

1998 Caterpillar 3512 Generator

Price Drop
$168,049.20 USD
3 POLE CIRCUIT BREAKER, 60 HZ, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, LOW FUEL CONSUMPTION OPTIMIZED, NO ENCLOSURE, Online Owner's Manual, Package Type Cat Standard Unit,...
Inspection Report
ConditionUsed
Usage1,000 Hours
Stock NumberE220008J
MLS Number11814953
CategoryGenerator Sets
Last Updated11/30/2025
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
Did you find what you were looking for? Yes No

The Marketplace for Buying and Selling Industrial Generators

A generator set, aka a "gen set", can provide power to any job site that is not connected to grid or otherwise needs an emergency supply. In addition, a gen set can save money by producing power during peak hours when energy costs the most (a practice known as “peak shaving”). We are pleased to offer a huge listing of gas, natural gas, and diesel generator sets for all of your power supply needs.

Choosing the Right Gen Set

A gen set can be split into three main types:

  • Diesel Generator Sets – A diesel genset has better fuel efficiency than a gas gen set, but usually cost more. Earlier models are much noisier than modern versions.
  • Gasoline Generator Sets – Although less expensive than diesel, their components are actually more expensive to replace. More popular than diesel when it comes to intermittent use.
  • Natural Gas – The most expensive gen set to operate is also potentially explosive, so caution must be taken at all times. However, since many buildings have a natural gas line, you usually won’t need to store fuel.

Whether you choose a natural gas, gasoline, or diesel genset, you will need to decide on the best cooling system. Again, there are three types:

  • Air-cooled – The loudest and cheapest cooling system with low maintenance costs (typically received for smaller generator sets).
    Typically used for power levels ranging from 8 to 20 kilowatts.
  • Water-cooled – Larger generator sets require liquid cooling, which is quieter than air, but also more complex and oftentimes messier.
    Typically used for power levels ranging from 25 to 60 kilowatts.
  • Hydrogen – The most powerful gen set is also the most dangerous; hydrogen is highly combustible and most be closely monitored.
    Typically used for power levels above 60 kilowatts.
Got a generator to sell? In minutes, you can create an online listing for your generator and advertise it to thousands of buyers.
Start selling today