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. Compare specs using filter by hours, price, or year.
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.
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Showing 1 - 25 of 1,828 Generator Listings

1 - 25 of 1,828 listings
1 - 25 of 1,828 listings
Featured Item
Caterpillar 3512 Generator
10 0

1986 Caterpillar 3512 Generator

Recently Updated
$133,506.53 USD
3 POLE CIRCUIT BREAKER, 60 HZ, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, EMCP 4.2 CONTROL PANEL, Online Owner's Manual, Package Type Cat Standard Unit, STANDBY,
ConditionUsed
Usage1,500 Hours
Stock NumberE220008L
MLS Number11814955
CategoryGenerator Sets
Last Updated12/8/2025
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
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
2016 Caterpillar XQ35 C2.2 Generator
17 0

2016 Caterpillar XQ35 C2.2 Generator

Newly Listed
At auction Dec. 11
2016 Caterpillar XQ35 C2.2 Generator, s/n CATOXQ35KJ700237, Cat diesel, (Not Running, Condition Unknown) (Low Content Alarm, Missing Battery) (Reads 85 hours) May be subject to ARB...
ConditionUsed
Usage85 Hours
Stock NumberK0370
MLS Number14025651
CategoryGenerator Sets
Last Updated12/10/2025
Location
Jurupa Valley, CA, US
Listed By
JJ Kane Auctions
Caterpillar D100P4 Generator
12 0

2004 Caterpillar D100P4 Generator

Recently Updated
At auction Dec. 11
2004 Caterpillar D100P4 Generator, s/n OLY00000CD4P00118, Perkins diesel, with 100 KW Generator, (Not Ruuning) (Reads 54 hours) May be subject to ARB Regulations NOTE: This unit is being...
ConditionUsed
Usage54 Hours
Stock NumberK0391
MLS Number14003976
CategoryGenerator Sets
Last Updated12/10/2025
Location
Jurupa Valley, CA, US
Listed By
JJ Kane Auctions
Kohler 2000REOZMD Diesel Generator
6 0

2018 Kohler 2000REOZMD Diesel Generator

Recently Updated
Contact for price
Kohler 2000 kW standby (1820 kW prime) diesel generator set, model 2000REOZMD, SN-. Mitsubishi S16R-Y2PTAW2-1 engine rated 2923 HP at 1800 RPM, SN-, EPA Tier 2 emissions. 3/60/277/480V. 2000...
ConditionUsed
Usage223 Hours
Horse Power2923 HP
Engine ModelMitsubishi S16R-Y2PTAW2-1
Emission RatingUSA Tier 2
Stock NumberCentral States #4884
MLS Number13995953
CategoryGenerator Sets
Last Updated12/10/2025
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
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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.
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