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 1,794 results
1-25 of 1,794 results
Featured Item
Generator 20 KW 2013 Multiquip Single / 3 Ph 120 / 240 / 480V Trailer Mounted MQ
18 1

Generator 20 KW 2013 Multiquip Single / 3 Ph 120 / 240 / 480V Trailer Mounted MQ

Price Reduced
$18,000 USD
Generator 20 KW 2013 Multiquip Single / 3 Ph 120 / 240 / 480V Trailer Mounted MQ EASY BUSINESS FINANCING AVAILABLE!* Please call Gary with any questions or to discuss any additional details...
ConditionUsed
Usage4,444 Hours
Stock NumberTC0423794123DS180
MLS Number12017068
CategoryGenerator Sets
Last Updated7/22/2024
Location
Orem, UT, US
Sold By

Global Remarketing

Featured Item
Cummins DQFAD Diesel Generator
2 0

2007 Cummins DQFAD Diesel Generator

$399,900 USD
Cummins 1000 kW trailered / portable rental grade standby (900 kW prime) diesel generator set, model DQFAD, SN-C070042109. Cummins QST30-G5 NR2 engine rated 1490 HP at 1800 RPM, EPA Tier 2...
ConditionUsed
Horse Power1490 HP
Engine ModelCummins QST30-G5 NR2
Emission RatingUSA Tier 2
Rear AxleTandem Axle
Stock NumberCentral States #4538
MLS Number12998489
CategoryGenerator Sets
Last Updated7/23/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Multiquip DCA70SSIU Diesel Generator
12 1

2016 Multiquip DCA70SSIU Diesel Generator

$35,900 USD
MQ Power Multquip Whisperwatt 62 kW standby (56 kW prime) rental grade diesel generator set, model DCA-70SSJU4i, SN-7306744. John Deere 4045HFG92 engine rated 107 HP at 1800 RPM,...
ConditionUsed
Usage6,593 Hours
Horse Power107 HP
Engine ModelJohn Deere 4045HFG92
Emission RatingUSA Tier 4 Final
Stock NumberCentral States #4174
MLS Number12657814
CategoryGenerator Sets
Last Updated7/22/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar C4.4 Diesel Generator
7 0

2020 Caterpillar C4.4 Diesel Generator

$51,500 USD
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 or...
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 Updated7/22/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar G-3412CLE / Ariel JGJ-4 Two Stage Unit
4 0

Caterpillar G-3412CLE / Ariel JGJ-4 Two Stage Unit

$75,000 USD
This piece of equipment is being sold through an online auction. The posted price in no way reflects a starting bid, reserve price or any expectation of price from the bank. BANK OWNED...
ConditionUsed
MLS Number12976529
CategoryGenerator Sets
Last Updated7/9/2024
Location
Johns Creek, GA, US
Sold By

Bullseye Auction & Appraisal, LLC

Featured Item
Caterpillar XQ570 Diesel Generator
12 1

2021 Caterpillar XQ570 Diesel Generator

$269,900 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 Updated7/22/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

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 Updated7/3/2024
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar 3516 Generator
7 0

2023 Caterpillar 3516 Generator

$489,000 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 Updated7/3/2024
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar 3512 Generator
1 0

1986 Caterpillar 3512 Generator

$274,725.27 USD
Online Owner's Manual, Package Type Dealer Packaged Unit,
ConditionUsed
Usage1,500 Hours
Stock NumberE220008M
MLS Number11814956
CategoryGenerator Sets
Last Updated7/2/2024
Location
Pointe-Claire, QC, Canada
Sold By

Toromont 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 Updated6/12/2024
Location
San Leandro, CA, US
Sold By

Peterson 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 Updated7/3/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ60 Generator
9 0

2013 Caterpillar XQ60 Generator

$39,500 USD
Online Owner's Manual,
ConditionUsed
Usage7,786 Hours
Stock Number028393
MLS Number12278072
CategoryGenerator Sets
Last Updated7/3/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar G045F3S Generator
14 0

2007 Caterpillar G045F3S Generator

$14,500 USD
60 HZ, AUTO START, GENERATOR, GENERATORS, NATURAL GAS, OLYMPIAN BRAND GENSET, Online Owner's Manual, SKID MOUNTED CAT/OLYMPIAN 2007, STANDBY,
Inspection Report
ConditionUsed
Usage181 Hours
Stock NumberUE01328
MLS Number11379916
CategoryGenerator Sets
Last Updated7/3/2024
Location
Eugene, OR, US
Sold By

Peterson 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 Updated7/2/2024
Location
Indianapolis, IN, US
Sold By

MacAllister Machinery

2017 CATERPILLAR XQ35 GENERATOR
9 0

2017 CATERPILLAR XQ35 GENERATOR

Recently Updated
At auction Jul. 27
2017 CATERPILLAR XQ35 GENERATOR, 28kw, diesel, portable, 1,095 hours indicated. s/n:0JK700312
ConditionUsed
Stock Number102004244
MLS Number12959658
CategoryGenerator Sets
Last Updated7/26/2024
Location
Madera, CA, US
Listed By

The Auction Company

2019 Caterpillar XQ35 Generator
8 0

2019 Caterpillar XQ35 Generator

Recently Updated
At auction Jul. 27
2019 CATERPILLAR XQ35 GENERATOR, 28kw, diesel, portable. s/n:0JK800422
ConditionUsed
Stock Number100311244
MLS Number12959704
CategoryGenerator Sets
Last Updated7/26/2024
Location
Madera, CA, US
Listed By

The Auction Company

2019 CATERPILLAR XQ60 GENERATOR
9 0

2019 CATERPILLAR XQ60 GENERATOR

Recently Updated
At auction Jul. 27
2019 CATERPILLAR XQ60 GENERATOR, 48kw, diesel, portable. S/N:0CF900529
ConditionUsed
Stock Number100505244
MLS Number12959581
CategoryGenerator Sets
Last Updated7/26/2024
Location
Madera, CA, US
Listed By

The Auction Company

2015 MULTIQUIP DCA125SJU4 GENERATOR
12 0

2015 MULTIQUIP DCA125SJU4 GENERATOR

Recently Updated
At auction Jul. 27
2015 MULTIQUIP DCA125SJU4 GENERATOR, 100kw, diesel, portable. s/n:7501434-L016541
ConditionUsed
Stock Number100301244
MLS Number12959567
CategoryGenerator Sets
Last Updated7/26/2024
Location
Madera, CA, US
Listed By

The Auction Company

EF2200IS INVERTER Generator
6 0

EF2200IS INVERTER Generator

Newly Listed
At auction Aug. 10
PORTABLE GENERATOR, 30 AMPS, 1-PHASE, 4 CYL, GAS, 2200 WATT, NEW/UNUSED,60 HZ, 120V, 79CC, HOUR METER READS: 0
ConditionUsed
Stock Number387940
MLS Number13010842
CategoryGenerator Sets
Last Updated7/26/2024
Location
Pelzer, SC, US
Listed By

Jeff Martin Auctioneers

EF2200IS INVERTER Generator
6 0

EF2200IS INVERTER Generator

Newly Listed
At auction Aug. 10
PORTABLE GENERATOR, 30 AMPS, 1-PHASE, 4 CYL, GAS, 2200 WATT, NEW/UNUSED, 120V, 79CC, 60HZ, HOUR METER READS: 0
ConditionUsed
Stock Number387998
MLS Number13010841
CategoryGenerator Sets
Last Updated7/26/2024
Location
Pelzer, SC, US
Listed By

Jeff Martin Auctioneers

Kohler 400REOZJ Diesel Generator
11 0

2013 Kohler 400REOZJ Diesel Generator

Newly Listed
$79,900 USD
Used Kohler 400 kW standby (365 kW prime) diesel generator set, model 400REOZJ, SN-SGM324G2V. John Deere 6135HF485 engine rated 617 HP at 1800 RPM, SN-RG6135L027600, EPA Tier 3 emissions....
ConditionUsed
Usage380 Hours
Horse Power617 HP
Engine ModelJohn Deere 6135HF485
Emission RatingUSA Tier 3
Stock NumberCentral States #4536
MLS Number13009863
CategoryGenerator Sets
Last Updated7/26/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins C125D6C Diesel Generator
8 0

2024 Cummins C125D6C Diesel Generator

Newly Listed
$39,900 USD
*****Just arrived***** New Cummins 125 kW standby (112.5 kW prime) diesel generator set, model C125D6C. Cummins QSB5-G6 NR3 engine rated 208 HP at 1800 RPM, EPA Tier 3 emissions....
ConditionNew
Horse Power208 HP
Engine ModelCummins QSB5-G6
Emission RatingUSA Tier 3
Stock NumberCentral States #3705
MLS Number13009697
CategoryGenerator Sets
Last Updated7/26/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins C125D6C Diesel Generator
8 0

2024 Cummins C125D6C Diesel Generator

Newly Listed
$39,900 USD
*****Just arrived***** New Cummins 125 kW standby (112.5 kW prime) diesel generator set, model C125D6C. Cummins QSB5-G6 NR3 engine rated 208 HP at 1800 RPM, EPA Tier 3 emissions....
ConditionNew
Horse Power208 HP
Engine ModelCummins QSB5-G6
Emission RatingUSA Tier 3
Stock NumberCentral States #3704
MLS Number13009696
CategoryGenerator Sets
Last Updated7/26/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins C125D6C Diesel Generator
8 0

2024 Cummins C125D6C Diesel Generator

Newly Listed
$39,900 USD
*****Just arrived***** New Cummins 125 kW standby (112.5 kW prime) diesel generator set, model C125D6C. Cummins QSB5-G6 NR3 engine rated 208 HP at 1800 RPM, EPA Tier 3 emissions....
ConditionNew
Horse Power208 HP
Engine ModelCummins QSB5-G6
Emission RatingUSA Tier 3
Stock NumberCentral States #3703
MLS Number13009695
CategoryGenerator Sets
Last Updated7/26/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins C125D6C Diesel Generator
8 0

2024 Cummins C125D6C Diesel Generator

Newly Listed
$39,900 USD
*****Just arrived***** New Cummins 125 kW standby (112.5 kW prime) diesel generator set, model C125D6C. Cummins QSB5-G6 NR3 engine rated 208 HP at 1800 RPM, EPA Tier 3 emissions....
ConditionNew
Horse Power208 HP
Engine ModelCummins QSB5-G6
Emission RatingUSA Tier 3
Stock NumberCentral States #3702
MLS Number13009694
CategoryGenerator Sets
Last Updated7/26/2024
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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