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 1,836 results
1-25 of 1,836 results
Featured Item
Caterpillar 3512 Generator
13 0

1998 Caterpillar 3512 Generator

Price Drop
$334,662.49 USD
60 HZ, AUTO START, CAT BRAND GENSET, DIESEL, Online Owner's Manual, STANDBY,
ConditionUsed
Usage671 Hours
Stock NumberE210009A
MLS Number10860410
CategoryGenerator Sets
Last Updated12/2/2024
Location
Pointe-Claire, QC, Canada
Sold By

Toromont Power Systems

Featured Item
Caterpillar XQ125 T4F Generator
1 0

2018 Caterpillar XQ125 T4F Generator

$47,000 USD
Online Owner's Manual,
ConditionUsed
Usage7,097 Hours
Stock NumberRP14023
MLS Number12965824
CategoryGenerator Sets
Last Updated11/28/2024
Location
Amarillo, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
5 0

2013 Caterpillar XQ350 Mobile Power Module Generator Set

Call for price
Online Owner's Manual,
ConditionUsed
Usage11,232 Hours
Stock NumberRP12547
MLS Number12624121
CategoryGenerator Sets
Last Updated11/28/2024
Location
Midland, TX, US
Sold By

Warren 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 Updated11/16/2024
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar XQ 200 (120-480 V) 200@1800/3/SBY EKW@RPM/PH/R Generator
18 0

2014 Caterpillar XQ 200 (120-480 V) 200@1800/3/SBY EKW@RPM/PH/R Generator

$99,500 USD
110% SPILL CONTAINMENT, 2014 XQ200 W/TRAILER, 3 WAY FUEL VALVE, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, CONTINUOUS, DIESEL, DUAL WALL FUEL TANK,...
Inspection Report
ConditionUsed
Usage3,153 Hours
Stock NumberNR15767
MLS Number11368649
CategoryGenerator Sets
Last Updated11/16/2024
Location
Eugene, OR, 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 Updated11/16/2024
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar 3516 Generator
1 0

1989 Caterpillar 3516 Generator

Call for price
ConditionUsed
Usage2,075 Hours
Stock NumberE16627
MLS Number13197322
CategoryGenerator Sets
Last Updated11/11/2024
Location
Florence, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar 3516 Generator
2 0

1990 Caterpillar 3516 Generator

Call for price
ConditionUsed
Usage1,928 Hours
Stock NumberE16626
MLS Number13197319
CategoryGenerator Sets
Last Updated11/11/2024
Location
Florence, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar 3412 Generator
5 0

1988 Caterpillar 3412 Generator

Call for price
ConditionUsed
Usage184 Hours
Stock NumberE16617
MLS Number13197316
CategoryGenerator Sets
Last Updated11/11/2024
Location
Florence, SC, US
Sold By

Blanchard 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 Updated11/11/2024
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 Updated11/11/2024
Location
Milford, MA, US
Sold By

Milton CAT Power Systems

Featured Item
Caterpillar XQ400 Generator
14 0

2008 Caterpillar XQ400 Generator

Call for price
110% SPILL CONTAINMENT, 50 HZ, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, COOLANT HEATER, DIESEL, DUAL WALL FUEL TANK, EPA LABEL, FUEL TANK, GENERATORS,...
ConditionUsed
Usage7,407 Hours
Stock NumberEU00132
MLS Number12281765
CategoryGenerator Sets
Last Updated11/11/2024
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
2014 MMD Generator
7 0

2014 MMD Generator

$27,000 USD
ConditionUsed
MLS Number13165155
CategoryGenerator Sets
Last Updated10/8/2024
Location
San Luis, AZ, US
Sold By

Water on Wheels LLC

Featured Item
Caterpillar C4.4 Diesel Generator
11 1

2020 Caterpillar C4.4 Diesel Generator

$51,500 USD
Used Caterpillar XQ125 110 kW standby (100 kW prime) rental grade diesel generator, SN-CK500876. CAT C4.4 engine, SN-J9G01028, EPA Tier 4 Final emissions. 3/60/277/480V or 3/60/120/208V...
ConditionUsed
Usage5,320 Hours
Engine ModelCaterpillar C4.4
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4530
MLS Number12978920
CategoryGenerator Sets
Last Updated10/2/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar XQ230 Diesel Generator
12 1

2019 Caterpillar XQ230 Diesel Generator

$109,900 USD
Used Caterpillar XQ230 200 kW standby (182 kW prime) rental grade diesel generator, SN-CK200192. CAT C7.1 engine rated 320 HP at 1800 RPM, SN-7L300467, EPA Tier 4 Final emissions....
ConditionUsed
Usage4,146 Hours
Horse Power320 HP
Engine ModelCaterpillar C7.1
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4522
MLS Number12978894
CategoryGenerator Sets
Last Updated9/30/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar XQ570 Diesel Generator
12 1

2021 Caterpillar XQ570 Diesel Generator

$249,900 USD
Used Caterpillar XQ570 500 kW standby (455 kW prime) rental grade diesel generator, SN-ME500429. CAT C18 engine rated 779 HP at 1800 RPM, SN-CM800662, EPA Tier 4 Final emissions. ...
ConditionUsed
Usage4,429 Hours
Horse Power779 HP
Engine ModelCaterpillar C18
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4475
MLS Number12786355
CategoryGenerator Sets
Last Updated9/30/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Olympian G25UH1 Generator
11 0

1999 Olympian G25UH1 Generator

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ConditionUsed
Usage371 Hours
Stock NumberEU00141
MLS Number12740074
CategoryGenerator Sets
Last Updated11/11/2024
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar 3412 Generator
10 0

1995 Caterpillar 3412 Generator

Call for price
Online Owner's Manual,
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated11/11/2024
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar XQ 570 Generator
7 0

2022 Caterpillar XQ 570 Generator

$375,500 USD
Auto Start, Battery Charger, Cat Brand Genset, Engine Governor, Engine Type - Diesel, Fire Extinguisher, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer, Jacket...
ConditionUsed
Usage175 Hours
MLS Number12420982
CategoryGenerator Sets
Last Updated11/11/2024
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

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 Updated11/11/2024
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
8 0

2014 Caterpillar XQ350 Mobile Power Module Generator Set

$115,000 USD
Online Owner's Manual,
ConditionUsed
Usage7,501 Hours
Stock Number028453
MLS Number12271997
CategoryGenerator Sets
Last Updated11/11/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

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 Updated11/11/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ200 Generator
4 0

2014 Caterpillar XQ200 Generator

$82,500 USD
Online Owner's Manual,
ConditionUsed
Usage7,540 Hours
Stock Number028220
MLS Number12272001
CategoryGenerator Sets
Last Updated11/11/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Multiquip DCA125SS Generator
2 0

2018 Multiquip DCA125SS Generator

$47,500 USD
ConditionUsed
Usage6,275 Hours
Stock NumberRP15290
MLS Number12590976
CategoryGenerator Sets
Last Updated11/11/2024
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar SR4B Generator
6 0

2001 Caterpillar SR4B Generator

$10,000 USD
Online Owner's Manual,
ConditionUsed
Stock NumberEPU10903
MLS Number10145186
CategoryGenerator Sets
Last Updated11/11/2024
Location
Indianapolis, IN, US
Sold By

MacAllister Machinery

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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