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 1,955 results
1-25 of 1,955 results
Featured Item
Multiquip DCA150 Generator
4 0

2014 Multiquip DCA150 Generator

$45,000 USD
110% Spill Containment, Auto Start, Battery Charger, Battery Disconnect Switch, Camlocks, Emissions Level, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator,...
ConditionUsed
Usage5,147 Hours
Stock NumberE16389
MLS Number13725278
CategoryGenerator Sets
Last Updated8/12/2025
Location
West Columbia, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar APS100 - 208-240-480 Generator
4 0

2014 Caterpillar APS100 - 208-240-480 Generator

$6,786.67 USD
Auto Start, Hitch, Trailer, Jacket Water Heater,
ConditionUsed
Usage21,614 Hours
Stock NumberRE15005C
MLS Number13698101
CategoryGenerator Sets
Last Updated8/12/2025
Location
Brampton, ON, Canada
Sold By

Toromont Power Systems

Featured Item
Caterpillar XQ35 Generator
8 0

2017 Caterpillar XQ35 Generator

$21,500 USD
Package Type Cat Standard Unit,
ConditionUsed
Usage4,406 Hours
MLS Number13674741
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar XQ35 Generator
10 0

2016 Caterpillar XQ35 Generator

$19,900 USD
Package Type Cat Standard Unit,
ConditionUsed
Usage4,885 Hours
MLS Number13671814
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar XQ500 STEP DECK Generator
14 0

2010 Caterpillar XQ500 STEP DECK Generator

$226,000 USD
Package Type Dealer Packaged Unit,
ConditionUsed
Usage1,476 Hours
MLS Number13644387
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

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
Caterpillar XQ200 Generator
4 0

2014 Caterpillar XQ200 Generator

$64,500 USD
Online Owner's Manual,
ConditionUsed
Usage9,596 Hours
Stock Number028220
MLS Number12272001
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator
8 0

2014 Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator

$110,000 USD
110% SPILL CONTAINMENT, 3 WAY FUEL VALVE, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, CAT C13 ENGINE, CATERPILLAR XA350 TIER4I, CIRCUIT BREAKER, CEM,...
Inspection Report
ConditionUsed
Usage6,727 Hours
Stock NumberNR12802
MLS Number13305187
CategoryGenerator Sets
Last Updated8/12/2025
Location
Eugene, OR, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
8 0

2014 Caterpillar XQ350 Mobile Power Module Generator Set

Contact for price
Online Owner's Manual,
ConditionUsed
Usage7,501 Hours
Stock Number028453
MLS Number12271997
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar 3516 RADIATOR Generator
5 0

2001 Caterpillar 3516 RADIATOR Generator

$5,000 USD
Inspection Report
ConditionUsed
Usage2,005 Hours
Stock NumberE16563
MLS Number13262221
CategoryGenerator Sets
Last Updated8/12/2025
Location
Florence, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
12 0

2013 Caterpillar XQ350 Mobile Power Module Generator Set

$145,500 USD
CATERPILLAR XQ350 GENERATOR, Online Owner's Manual, SKID MOUNTED,
Inspection Report
ConditionUsed
Usage1,845 Hours
Stock NumberUE01271
MLS Number11379738
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar 3516B Generator Set
5 0

1999 Caterpillar 3516B Generator Set

$340,000 USD
60 HZ, CAT BRAND GENSET, CONTINUOUS, DIESEL, EMCP II+, GENERATORS, LESS THAN 1000 SINCE NEW, Online Owner's Manual, PRIME, STANDBY, USED 3516B 2000KW 2500KVA 480V 3PH 60HZ OPEN SKID,
ConditionUsed
Usage1,000 Hours
MLS Number9118451
CategoryGenerator Sets
Last Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar 3516B Generator
7 0

2024 Caterpillar 3516B Generator

$565,000 USD
** ENGINE WARRANTY BY MFG, 1825KW PRIME RATING 480V 60HZ 1800RPM - 1600KW PRIME RATING 400V 50HZ 15000 RPM, 60 HZ, CAT BRAND GENSET, DIESEL, EMCP 3.2 CONTROL PANEL - JACKET WATER HEATER,...
ConditionUsed
MLS Number965992
CategoryGenerator Sets
Last Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ 1250 Generator
1 0

1990 Caterpillar XQ 1250 Generator

$489,000 USD
Auto Start, Battery Charger, Camlocks, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer, Permanent Magnet Generator (PMG),...
Inspection Report
ConditionUsed
Usage670 Hours
MLS Number12860676
CategoryGenerator Sets
Last Updated8/12/2025
Location
Fort Myers, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ 2000 (277-480 V) 2000@1800/3/SBY EKW@RPM/PH/R Generator
6 0

Caterpillar XQ 2000 (277-480 V) 2000@1800/3/SBY EKW@RPM/PH/R Generator

$899,000 USD
60 HZ, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, BRAND NEW CONTAINER, NEW 1250GLS FUEL TANK, NEW HORIZONTAL RADIATOR, NEW EXHAUST SYSTEM, GENSET CONTROL PANEL EMCP 4.4 WITH MULTIFUNCTION...
ConditionUsed
Usage1,000 Hours
MLS Number11819023
CategoryGenerator Sets
Last Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

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

Cummins DFEK Diesel Generator
11 0

2003 Cummins DFEK Diesel Generator

Newly Listed
$59,900 USD
Cummins 500 kW standby (455 kW prime) diesel generator set, model DFEK, SN-C030480770. Cummins QSX15-G9 engine rated 755 HP at 1800 RPM, SN-79004665. 3/60/277/480V, 12 lead reconnectable to...
ConditionUsed
Usage887 Hours
Horse Power755 HP
Engine ModelCummins QSX15-G9
Emission RatingUSA Tier 2
Stock NumberCentral States #4777
MLS Number13753631
CategoryGenerator Sets
Last Updated8/12/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Caterpillar 3508 Generator
4 0

1999 Caterpillar 3508 Generator

Newly Listed
$65,500 USD
Auto Start, Base Type - Skid, Cat Brand Genset, Circuit Breaker - 3 Pole, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, Rating - Standby,
ConditionUsed
Usage985 Hours
MLS Number13753503
CategoryGenerator Sets
Last Updated8/12/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar XQ200 Generator
6 0

2013 Caterpillar XQ200 Generator

Price Drop
$57,000 USD
ConditionUsed
Usage3,909 Hours
MLS Number13723397
CategoryGenerator Sets
Last Updated8/12/2025
Location
Tarrant, AL, US
Sold By

Thompson Tractor Co.

Cummins DFEJ Diesel Generator
11 1

2020 Cummins DFEJ Diesel Generator

Price Drop
$79,900 USD
Used Cummins 450 kW standby (410 kW prime) diesel generator set, model DFEJ, SN-D200754316. Cummins QSX15-G9 NR2 engine rated 755 HP at 1800 RPM, SN-80254514, EPA Tier 2 emissions. 3/60/277...
ConditionUsed
Usage38 Hours
Horse Power755 HP
Engine ModelCummins QSX15-G9 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4708
MLS Number13566711
CategoryGenerator Sets
Last Updated8/12/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins DFEJ Diesel Generator
11 1

2020 Cummins DFEJ Diesel Generator

Price Drop
$79,900 USD
Used Cummins 450 kW standby (410 kW prime) diesel generator set, model DFEJ, SN-E200767756. Cummins QSX15-G9 NR2 engine rated 755 HP at 1800 RPM, SN-80257492, EPA Tier 2 emissions. 3/60/277...
ConditionUsed
Usage91 Hours
Horse Power755 HP
Engine ModelCummins QSX15-G9 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4673
MLS Number13498503
CategoryGenerator Sets
Last Updated8/12/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Multiquip MQ180 T4F Generator
1 0

2018 Multiquip MQ180 T4F Generator

Recently Updated
$55,000 USD
ConditionUsed
Usage7,938 Hours
Stock NumberRP14384
MLS Number12628397
CategoryGenerator Sets
Last Updated8/12/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Caterpillar XQ350 Mobile Power Module Generator Set
1 0

2012 Caterpillar XQ350 Mobile Power Module Generator Set

Recently Updated
$50,000 USD
ConditionUsed
Usage16,587 Hours
Stock NumberRP11975
MLS Number12590946
CategoryGenerator Sets
Last Updated8/12/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Caterpillar 3512 Generator
6 0

1998 Caterpillar 3512 Generator

Recently Updated
$783,915.22 USD
60 HZ, AUTO START, CAT BRAND GENSET, DIESEL, Online Owner's Manual, STANDBY,
ConditionUsed
Usage671 Hours
Stock NumberE210009A
MLS Number10860410
CategoryGenerator Sets
Last Updated8/12/2025
Location
Pointe-Claire, QC, Canada
Sold By

Toromont Power Systems

Caterpillar 275KW Generator
24 0

Caterpillar 275KW Generator

Recently Updated
$12,900 USD
60 HZ, CAT GENSET, FUEL TANK, ENGINE GOVERNOR, TRANSPORTABILITY, TRAILER MOUNTED, DIESEL, CONDITION AND HOURS SUBJECT TO CHANGE, PLEASE CALL FOR MACHINE LOCATION,
ConditionUsed
Usage4,988 Hours
Stock Number6BA2439
MLS Number13711911
CategoryGenerator Sets
Last Updated8/11/2025
Location
Shelby Twp., MI, US
Sold By

MacAllister Machinery - North

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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