Generator Sets For Sale

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

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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1-25 of 1,959 results
1-25 of 1,959 results
Featured Item
Doosan G325WCU-3A Diesel Generator
8 4

2012 Doosan G325WCU-3A Diesel Generator

$65,000 USD
2012 Doosan G325WCU-3A Generator, Only 4,472 Hrs., Cummins QSL9-GB Diesel Engine, Ready to Work!, Call Christopher Lillo 310~977~7903,
ConditionUsed
Usage4,472 Hours
Stock NumberCA05042025CL
MLS Number13558814
CategoryGenerator Sets
Last Updated7/22/2025
Location
Los Angeles, CA, US
Sold By

Lillo Machinery, Inc.

Featured Item
Marathon Generator - MARATHON ELECTRIC MOTOR -480Volts/150Amps
6 0

Marathon Generator - MARATHON ELECTRIC MOTOR -480Volts/150Amps

$4,500 USD
MagnaMax AC generator 480Volts/150Amps
ConditionUsed
Attachment MakeMarathon Electric
MLS Number10674696
CategoryGenerator Sets
Last Updated7/24/2025
Location
Middleton, WI, US
Sold By

NORTHWESTERN STONE LLC

Caterpillar 455KW Generator
24 0

1996 Caterpillar 455KW Generator

Recently Updated
$17,900 USD
455KW GEN, CAT 3412, 30' CONEX BOX, CONDITION AND HOURS SUBJECT TO CHANGE, PLEASE CALL FOR MACHINE LOCATION,
ConditionUsed
Usage10,991 Hours
Stock NumberAA~081Z19437
MLS Number13709808
CategoryGenerator Sets
Last Updated8/10/2025
Location
Shelby Twp., MI, US
Sold By

MacAllister Machinery - North

Caterpillar 3512 Generator
11 0

2003 Caterpillar 3512 Generator

Recently Updated
$207,362.53 USD
Online Owner's Manual,
ConditionUsed
Usage3,000 Hours
Stock Number000000000010189918
MLS Number13632490
CategoryGenerator Sets
Last Updated8/10/2025
Location
Madrid, Spain
Sold By

Barloworld Finanzauto

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS
23 0

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS

Newly Listed
$11,295 USD
1990 Libby MEP-007B generator set, diesel powered, 100 KW rating, 50/60 Hz selectable, 3 phase, 120/208/240/416 voltage ratings, selectable. Pre wired w/ lugs as pictured, CAT 3306 diesel...
ConditionUsed
Stock Number17983
MLS Number13752307
CategoryGenerator Sets
Last Updated8/10/2025
Location
Carbondale, PA, US
Sold By

Old Forge Power Equipment, Inc

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS
23 0

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS

Newly Listed
$11,295 USD
1990 Libby MEP-007B generator set, diesel powered, 100 KW rating, 50/60 Hz selectable, 3 phase, 120/208/240/416 voltage ratings, selectable. Pre wired w/ lugs as pictured, CAT 3306 diesel...
ConditionUsed
Stock Number17982
MLS Number13752306
CategoryGenerator Sets
Last Updated8/10/2025
Location
Carbondale, PA, US
Sold By

Old Forge Power Equipment, Inc

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS
22 0

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS

Newly Listed
$11,295 USD
1990 Libby MEP-007B generator set, diesel powered, 100 KW rating, 50/60 Hz selectable, 3 phase, 120/208/240/416 voltage ratings, selectable. Pre wired w/ lugs as pictured, CAT 3306 diesel...
ConditionUsed
Stock Number17981
MLS Number13752305
CategoryGenerator Sets
Last Updated8/10/2025
Location
Carbondale, PA, US
Sold By

Old Forge Power Equipment, Inc

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS
17 0

1990 Libby MEP007B 100 KW Diesel Generator GOV'T SURPLUS

Newly Listed
$11,295 USD
1990 Libby MEP-007B generator set, diesel powered, 100 KW rating, 50/60 Hz selectable, 3 phase, 120/208/240/416 voltage ratings, selectable. Pre wired w/ lugs as pictured, CAT 3306 diesel...
ConditionUsed
Stock Number17980
MLS Number13752304
CategoryGenerator Sets
Last Updated8/10/2025
Location
Carbondale, PA, US
Sold By

Old Forge Power Equipment, Inc

Caterpillar 3456 Generator
8 0

2005 Caterpillar 3456 Generator

Recently Updated
$51,840.63 USD
Online Owner's Manual,
ConditionUsed
Usage3,398 Hours
Stock Number000000000010227051
MLS Number13568613
CategoryGenerator Sets
Last Updated8/10/2025
Location
Madrid, Spain
Sold By

Barloworld Finanzauto

Caterpillar XQ570 Diesel Generator
8 0

2020 Caterpillar XQ570 Diesel Generator

Newly Listed
$229,900 USD
Used Caterpillar XQ570 500 kW standby (455 kW prime) rental grade diesel generator, SN-ME500244. CAT C18 engine rated 779 HP at 1800 RPM, SN-CM800382, EPA Tier 4 Final emissions. ...
ConditionUsed
Usage1,962 Hours
Horse Power779 HP
Engine ModelCaterpillar C18
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4813
MLS Number13752166
CategoryGenerator Sets
Last Updated8/10/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Caterpillar C13 Generator
2 0

2024 Caterpillar C13 Generator

Recently Updated
Contact for price
Annunciator Module, Auto Start, Battery Set, Cat Brand Genset, Circuit Breaker - 3 Pole, Control Panel - EMCP 4.2, Engine Type - Diesel, Expansion Module, Frequency - 60 Hz, Generator,...
ConditionUsed
Usage1 Hours
MLS Number13387763
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar C13 Generator
2 0

2024 Caterpillar C13 Generator

Recently Updated
Contact for price
Annunciator Module, Auto Start, Battery Set, Cat Brand Genset, Circuit Breaker - 3 Pole, Control Panel - EMCP 4.2, Engine Type - Diesel, Expansion Module, Frequency - 60 Hz, Generator,...
ConditionUsed
Usage1 Hours
MLS Number13387756
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3512C Generator
2 0

2023 Caterpillar 3512C Generator

Recently Updated
Contact for price
Annunciator Module - Remote, Auto Start, Base Type - Skid, Battery Set, Cat Brand Genset, Circuit Breaker - 3 Pole, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 60 Hz,...
ConditionUsed
Usage1 Hours
MLS Number13387739
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Airman SDG65 Generator
1 0

2016 Airman SDG65 Generator

Recently Updated
$16,500 USD
Horsepower 97.0 hp,
Inspection Report
ConditionUsed
Usage11,929 Hours
Stock NumberNR14107
MLS Number13301623
CategoryGenerator Sets
Last Updated8/10/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Airman SDG65 Generator
1 0

2016 Airman SDG65 Generator

Recently Updated
$16,500 USD
Horsepower 97.0 hp,
Inspection Report
ConditionUsed
Usage12,365 Hours
Stock NumberNR14113
MLS Number13301617
CategoryGenerator Sets
Last Updated8/10/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Caterpillar XQ1500 Generator
2 0

2001 Caterpillar XQ1500 Generator

Recently Updated
$625,000 USD
2001 CAT XQ1500 PORTABLE, 40FT CONTAINER ON TRI AXLE, CAT 3512B ENGINE, GENERATOR SET, Online Owner's Manual, TRAILER, UPGRADED CONTROLS, ZERO HOUR REFURB,
ConditionUsed
Usage2 Hours
Stock NumberXEU0039
MLS Number13109713
CategoryGenerator Sets
Last Updated8/10/2025
Location
Topeka, KS, US
Sold By

Foley Equipment

Caterpillar C9 Generator
2 0

2023 Caterpillar C9 Generator

Recently Updated
Contact for price
Auto Start, Base Type - Skid, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, No Enclosure...
ConditionUsed
MLS Number13027506
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516B Generator
11 0

2005 Caterpillar 3516B Generator

Recently Updated
$284,832.25 USD
Online Owner's Manual,
ConditionUsed
Usage661 Hours
Stock Number000000000010235957
MLS Number13004490
CategoryGenerator Sets
Last Updated8/10/2025
Location
Madrid, Spain
Sold By

Barloworld Finanzauto

Caterpillar 3516B Generator
12 0

2005 Caterpillar 3516B Generator

Recently Updated
$284,832.25 USD
Online Owner's Manual,
ConditionUsed
Usage705 Hours
Stock Number000000000010235436
MLS Number13004489
CategoryGenerator Sets
Last Updated8/10/2025
Location
Madrid, Spain
Sold By

Barloworld Finanzauto

Caterpillar 3516 B Generator
2 0

2024 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Base Type - Skid, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Jacket Water Heater, Rating - Standby, Rebuild Cat...
ConditionUsed
MLS Number12943692
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
2 0

2024 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Base Type - Skid, Battery Set - Standard, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Rebuild Cat Certified Rebuild,
ConditionUsed
MLS Number12943691
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
2 0

2024 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Jacket Water Heater, Rating - Standby, Rebuild Cat Certified Rebuild,
ConditionUsed
MLS Number12943679
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
2 0

2024 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Base Type - Skid, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Generator Space Heater, Jacket Water Heater, Rating -...
ConditionUsed
MLS Number12943678
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
2 0

2025 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Rating - Standby, Rebuild Cat Certified Rebuild,
ConditionUsed
MLS Number12940924
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
2 0

2025 Caterpillar 3516 B Generator

Recently Updated
Contact for price
Auto Start, Cat Brand Genset, Control Panel - EMCP 4.2B, Engine Type - Diesel, Frequency - 50 / 60 Hz, Generator, Jacket Water Heater, Rating - Standby, Rebuild Cat Certified Rebuild,
ConditionUsed
MLS Number12940922
CategoryGenerator Sets
Last Updated8/10/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

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.
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