Generator Sets For Sale

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

Explore new and used Generator Sets on MyLittleSalesman.com, with prices from $130 to $1,349,900. Use filters for hours, price, or year to narrow by what matters.
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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Showing 1 - 25 of 1,929 Generator Listings

1 - 25 of 1,929 listings
1 - 25 of 1,929 listings
Featured Item
2001 Caterpillar 3412PKGG 700KW 480V Generator

2001 Caterpillar 3412PKGG 700KW 480V Generator

$66,000 USD
700Kw standby rated, 635kW prime rated generator set. Generator comes with Sound Attenuated Enclosure and Ground Fault Relay System. 3412 Cat Engine with Regular System Changes every 500 Hrs...
ConditionUsed
Usage9,256 Hours
Engine ModelCaterpillar 3412
MLS Number14146681
CategoryGenerator Sets
Last Updated2/16/2026
Location
Grants Pass, OR, US
Sold By
Private Party
Featured Item
Caterpillar 3512 Generator

1986 Caterpillar 3512 Generator

$144,652.25 USD
3 POLE CIRCUIT BREAKER, 60 HZ, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, EMCP 4.2 CONTROL PANEL, NO ENCLOSURE, Online Owner's Manual, Package Type Dealer Packaged Unit,...
ConditionUsed
Usage1,500 Hours
Stock NumberE220008M
MLS Number11814956
CategoryGenerator Sets
Last Updated2/9/2026
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
Featured Item
2023 GENERAC G-25 TRAILER MOUNTED 25KW GENERATOR - ISUZU DIESEL - ONLY 3,000 HOURS - LIKE NEW

2023 GENERAC G-25 TRAILER MOUNTED 25KW GENERATOR - ISUZU DIESEL - ONLY 3,000 HOURS - LIKE NEW

$13,500 USD
PRO-QUIPLLC.COM CALL 954-367-3867 2023 GENERAC MDG25IF4 25KW TRAILER MOUNTED GENERATOR 3 PHASE ISUZU TURBO DIESEL ONLY 3,034 HOURS STILL LIKE NEW 100% RUST FREE AND IMMACULATE FRESH...
ConditionUsed
Usage3,034 Hours
Horse Power49 HP
Engine ModelIsuzu 2.2
Weight2771
Stock Number25 KW - ISUZU TURBO DIESEL - 3 PHASE
MLS Number14021856
CategoryGenerator Sets
Last Updated2/25/2026
Location
Pompano Beach, FL, US
Sold By
Pro Quip
Featured Item
Multiquip DCA150 Generator

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 Updated2/9/2026
Location
West Columbia, SC, US
Sold By
Blanchard Power Systems
Featured Item
Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator

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 Updated2/9/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
Featured Item
Caterpillar XQ2000 Mobile Power Module Generator Set

2023 Caterpillar XQ2000 Mobile Power Module Generator Set

$1,200,000 USD
3 Way Fuel Valve, Auto Start, Battery Charger, Camlocks, CE Plate, Emissions Level, Engine Governor, Engine Type - Diesel, Fire Extinguisher, Frequency - 50 / 60 Hz, Fuel Tank Type - Dual...
Inspection Report
ConditionUsed
MLS Number12860680
CategoryGenerator Sets
Last Updated2/9/2026
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

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 Updated2/9/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Caterpillar 3306 Generator

1979 Caterpillar 3306 Generator

Newly Listed
$16,500 USD
Good Used CAT 3306 Generator Set; 1988 Model – 345 Original Hours; 180kW Standby Rated; Open Skid Mount; Engine Driven Radiator; HD Air Cleaner; Electric Starter; EMCP Analog Control Panel;...
ConditionUsed
Usage345 Hours
Engine ModelCaterpillar 3306 PC
Stock Number1786
MLS Number14161599
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar XQ1500 Generator

2001 Caterpillar XQ1500 Generator

Newly Listed
$610,000 USD
Rebuilt/Refurbished CAT XQ1500 Generator Set; 1500kW Standby Rated; 480/277V; Sound Attenuated Enclosure; 1250G Fuel Tank; Zero Hour Rebuilt Engine (CAT Dealer Rebuild); Reconditioned...
ConditionUsed
Horse Power1971 HP
Engine ModelCaterpillar 3512B
Emission RatingUSA Tier 1
Rear AxleTandem Axle
Stock Number1718
MLS Number14161598
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3412C Generator

1999 Caterpillar 3412C Generator

Newly Listed
$99,500 USD
Used CAT 3412C Generator Set; 2000 Model - 583 Original Hours; 700kW Standby Rated; 480/277V; Weather Enclosure; Base Fuel Tank; EMCP 2 Controller; Breaker; Jacket Water Heater, Battery...
ConditionUsed
Usage583 Hours
Horse Power1039 HP
Engine ModelCaterpillar 3412C
Emission RatingUSA Non Tier
Stock Number1746
MLS Number14161571
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3456 Generator

2006 Caterpillar 3456 Generator

Newly Listed
$59,000 USD
Description, Used CAT 3456 Generator Set; 2006 Model – 4460 Hours; 500kW Standby Rated; 480/277V; Sound Attenuated Enclosure; Base Fuel Tank; EMCP 2+ Control Panel; Cleaned – Serviced – Load...
ConditionUsed
Usage4,460 Hours
Horse Power764 HP
Engine ModelCaterpillar 3456
Emission RatingUSA Tier 1
Stock Number1735
MLS Number14161570
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
MTU 16V2000 Generator

2007 MTU 16V2000 Generator

Newly Listed
$159,000 USD
Used MTU 1000DSEC Generator Set; 2007 Model – 400 Hours; 1000kW Standby Rated; 480/277V; Weather Enclosure; Control Panel; 1600A Breaker; MTU 16V2000 Engine; Jacket Water Heater; Battery...
ConditionUsed
Usage400 Hours
Horse Power1495 HP
Engine Model16V2000 G84
Emission RatingUSA Tier 2
Stock Number1734
MLS Number14161434
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
MTU 16V2000 Generator

2007 MTU 16V2000 Generator

Newly Listed
$159,000 USD
Used MTU 1000DSEC Generator Set; 2007 Model – 418 Hours; 1000kW Standby Rated; 480/277V; Weather Enclosure; Control Panel; 1600A Breaker; MTU 16V2000 Engine; Jacket Water Heater; Battery...
ConditionUsed
Usage418 Hours
Horse Power1495 HP
Engine Model16V2000 G84
Emission RatingUSA Tier 2
Stock Number1733
MLS Number14161433
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3412C Generator

2001 Caterpillar 3412C Generator

Newly Listed
$125,000 USD
Used CAT 3412C Generator Set; 2001 Model – 251 Hours; 800kW Standby Rated; 480/277V; Sound Attenuated Enclosure; EMCP 2 Controller; Breaker; Jacket Water Heater; Battery Charger; Cleaned,...
ConditionUsed
Usage251 Hours
Horse Power1180 HP
Engine ModelCaterpillar 3412C
Emission RatingUSA Non Tier
Stock Number1720
MLS Number14161346
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3512B Natural Gas Generator

2003 Caterpillar 3512B Natural Gas Generator

Newly Listed
$99,900 USD
Used CAT 3512B Land Electric Generator Set; 2003 Model – 32,501 Original Hours; Tier 1 Emissions; Kato 6P6-3150 Generator End; 600V; Heavy Duty Skid; Engine Driven Radiator; Oilfield Ready;...
ConditionUsed
Usage32,501 Hours
Horse Power1476 HP
Engine ModelCaterpillar 3512B
Emission RatingUSA Tier 1
Stock Number1709
MLS Number14161335
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3512B Natural Gas Generator

2003 Caterpillar 3512B Natural Gas Generator

Newly Listed
$99,900 USD
Used CAT 3512B Land Electric Generator Set; 2003 Model – 31,798 Original Hours; Tier 1 Emissions; Kato 6P6-3150 Generator End; 600V; Heavy Duty Skid; Engine Driven Radiator; Oilfield Ready;...
ConditionUsed
Usage31,798 Hours
Horse Power1476 HP
Engine ModelCaterpillar 3512B
Emission RatingUSA Tier 1
Stock Number1708
MLS Number14161334
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3512C Generator

2006 Caterpillar 3512C Generator

Newly Listed
$95,000 USD
Used CAT 3512C Land Electric Generator Set; 2006 Model – 56,096 Original Hours; Tier 2 Emissions; Kato 6P6-3150 Generator End; 600V; Heavy Duty Skid; Engine Driven Radiator; Oilfield Ready;...
ConditionUsed
Usage56,096 Hours
Horse Power1476 HP
Engine ModelCaterpillar 3512C
Emission RatingUSA Tier 2
Stock Number1707
MLS Number14161333
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Caterpillar 3512C Generator

2006 Caterpillar 3512C Generator

Newly Listed
$85,000 USD
Used CAT 3512C Land Electric Generator Set; 2006 Model – 57,701 Original Hours; Tier 2 Emissions; Kato 6P6-3150 Generator End; 600V; Heavy Duty Skid; Engine Driven Radiator; Oilfield Ready;...
ConditionUsed
Usage57,701 Hours
Horse Power1476 HP
Engine ModelCaterpillar 3512C
Emission RatingUSA Tier 2
Stock Number1706
MLS Number14161332
CategoryGenerator Sets
Last Updated2/25/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC

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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