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 1,860 results
1-25 of 1,860 results
Featured Item
Caterpillar 3412 Generator
13 0

1995 Caterpillar 3412 Generator

Recently Updated
Call for price
Online Owner's Manual,
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated7/8/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar XQ230 T4F Generator
8 0

2019 Caterpillar XQ230 T4F Generator

Recently Updated
$110,000 USD
Online Owner's Manual,
ConditionUsed
Usage905 Hours
Stock NumberEU00120
MLS Number12030926
CategoryGenerator Sets
Last Updated7/8/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
1 0

2012 Caterpillar XQ350 Mobile Power Module Generator Set

$50,000 USD
ConditionUsed
Usage16,587 Hours
Stock NumberRP11975
MLS Number12590946
CategoryGenerator Sets
Last Updated7/7/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar XQ35 Generator
10 0

2016 Caterpillar XQ35 Generator

$21,000 USD
Package Type Cat Standard Unit,
ConditionUsed
Usage3,879 Hours
MLS Number13671824
CategoryGenerator Sets
Last Updated7/7/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar C32 Diesel Generator
12 1

2021 Caterpillar C32 Diesel Generator

$299,500 USD
New Caterpillar 1000 kW standby (910 kW prime) diesel generator SN-JSJ04792. CAT C32 engine rated 1502 HP at 1800 RPM, SN-PRH08985, EPA Tier 2 emissions. 3/60/277/480V. 1600 Amp main-line...
ConditionNew
Usage3 Hours
Horse Power1502 HP
Engine ModelCaterpillar C32
Emission RatingUSA Tier 2
Stock NumberCentral States #4729
MLS Number13590715
CategoryGenerator Sets
Last Updated6/30/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Cummins DFEK Diesel Generator
10 0

2025 Cummins DFEK Diesel Generator

$119,900 USD
****Just In***** New Cummins 500 kW standby (455 kW prime) diesel generator set, model DFEK, SN-D250436352. Cummins QSX15-G9 engine rated 755 HP at 1800 RPM, SN-80703728, EPA Tier 2...
ConditionNew
Horse Power755 HP
Engine ModelCummins QSX15-G9 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4007
MLS Number13530462
CategoryGenerator Sets
Last Updated6/30/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar LC7024H Generator
7 0

2023 Caterpillar LC7024H Generator

$14,624.16 USD
CSA CERTIFICATION, PERMANENT MAGNET GENERATOR,
Inspection Report
ConditionUsed
Usage1 Hours
Stock NumberE230008Y
MLS Number12365776
CategoryGenerator Sets
Last Updated7/7/2025
Location
Brampton, ON, Canada
Sold By

Toromont Power Systems

Featured Item
Caterpillar 3512C Diesel Generator
11 0

2009 Caterpillar 3512C Diesel Generator

$389,900 USD
Used Caterpillar 1500 kW standby (1360 kW prime) diesel generator set, SN-SBG00350. CAT 3512C engine rated 2206 HP at 1800 RPM, SN-EBG00281, EPA Tier 2 emissions. 3//60/277/480V. 3 x 1200...
ConditionUsed
Usage585 Hours
Horse Power2206 HP
Engine ModelCaterpillar 3512C
Emission RatingUSA Tier 2
Stock NumberCentral States #4720
MLS Number13558438
CategoryGenerator Sets
Last Updated6/30/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar 3516C Diesel Generator
11 0

2008 Caterpillar 3516C Diesel Generator

$649,900 USD
Used Caterpillar 2000 kW standby (1825 kW prime) diesel generator set, SN-SBJ00543. CAT 3516C engine rated 2937 HP at 1800 RPM, SN-SBJ00543, EPA Tier 2 emissions. 3/60/277/480V. 3000 Amp...
ConditionUsed
Usage243 Hours
Horse Power2937 HP
Engine ModelCaterpillar 3516C
Emission RatingUSA Tier 2
Stock NumberCentral States #4696
MLS Number13558422
CategoryGenerator Sets
Last Updated6/30/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Olympian CAT G75F3 Generator
8 0

2007 Olympian CAT G75F3 Generator

$9,500 USD
Auto Start, Battery Charger, Control Panel, Engine Type - Natural Gas, Generator, Jacket Water Heater, Package Type Cat Standard Unit,
Inspection Report
ConditionUsed
Usage429 Hours
Stock NumberUE01432
MLS Number13554976
CategoryGenerator Sets
Last Updated7/7/2025
Location
Hillsboro, OR, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar G3406TA Generator
1 0

2012 Caterpillar G3406TA Generator

$31,100 USD
Online Owner's Manual,
ConditionUsed
Usage9,985 Hours
Stock NumberRP11315
MLS Number10875205
CategoryGenerator Sets
Last Updated7/7/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Olympian CAT G25LTA2 Generator
10 0

2016 Olympian CAT G25LTA2 Generator

$7,500 USD
ConditionUsed
Stock NumberP160065A
MLS Number9814029
CategoryGenerator Sets
Last Updated7/7/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar 3412T Generator
1 0

1987 Caterpillar 3412T Generator

$49,500 USD
Auto Start, Base Type - Skid, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, No Enclosure, Permanent...
ConditionUsed
Usage895 Hours
MLS Number13394160
CategoryGenerator Sets
Last Updated7/7/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

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 Updated7/7/2025
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 Updated7/7/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

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 Updated7/7/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar G55LTA2 Generator
5 0

2010 Caterpillar G55LTA2 Generator

$3,500 USD
ConditionUsed
Stock NumberEQ084412
MLS Number12641751
CategoryGenerator Sets
Last Updated7/7/2025
Location
Milford, MA, US
Sold By

Milton CAT Power Systems

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 Updated7/7/2025
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 Updated7/7/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
8 0

2013 Caterpillar XQ350 Mobile Power Module Generator Set

$89,500 USD
Online Owner's Manual,
ConditionUsed
Usage13,810 Hours
Stock Number028452
MLS Number12271996
CategoryGenerator Sets
Last Updated7/7/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Cummins 275 KVA Generator
8 0

1987 Cummins 275 KVA Generator

Recently Updated
Call for price
== Information in English == Empty weight: 3.275 kg, Dimensions (LxBxH): 305 x 115 x 170 cm, Type number: KT19G GENERATOR 275KVA Engine Brand: CUMMINS, Conditie: USED, Engine Cooling Type:...
ConditionUsed
Stock Number0512762
MLS Number13110121
CategoryGenerator Sets
Last Updated7/10/2025
Location
Balenhoek, Belgium
Sold By

Hamofa Industrial Engines

Airman GENSET 60 Generator
8 0

2020 Airman GENSET 60 Generator

Recently Updated
$37,900 USD
ConditionUsed
Usage4,770 Hours
Stock NumberCRS21-751
MLS Number13149155
CategoryGenerator Sets
Last Updated7/10/2025
Location
Elk Grove, CA, US
Sold By

Holt of California

Multiquip GENSET 45 Generator
9 0

2022 Multiquip GENSET 45 Generator

Recently Updated
$30,000 USD
ConditionUsed
Usage2,752 Hours
Stock NumberCRS22-945
MLS Number13155095
CategoryGenerator Sets
Last Updated7/10/2025
Location
Vacaville, CA, US
Sold By

Holt of California

Airman GENSET 45 Generator
8 0

2022 Airman GENSET 45 Generator

Recently Updated
$37,000 USD
ConditionUsed
Usage2,507 Hours
Stock NumberCRS22-059
MLS Number13149151
CategoryGenerator Sets
Last Updated7/10/2025
Location
Turlock, CA, US
Sold By

Holt of California

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 Updated7/10/2025
Location
Topeka, KS, US
Sold By

Foley Equipment

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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