Generator Sets For Sale

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

Browse real listings for new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $12,345,678. Filter by hours, price, or year to find your perfect Generator.
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 1,990 Generator Listings

1 - 25 of 1,990 listings
1 - 25 of 1,990 listings
Featured Item
Caterpillar 3412 Generator

1995 Caterpillar 3412 Generator

$99,000 USD
Auto Start, Base Tank, Battery Charger, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel - Other, Enclosure Lights, Enclosure Material - Aluminum, Engine Type - Diesel, EPA...
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated3/12/2026
Location
Knoxville, TN, US
Sold By
Stowers 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 Updated4/9/2026
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 Updated3/12/2026
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 Updated3/12/2026
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 Updated3/12/2026
Location
Fort Myers, FL, US
Sold By
Pantropic Power
Featured Item
Caterpillar XQ 1250 Generator

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 Updated3/12/2026
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 Updated3/12/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Caterpillar C15 Generator

2007 Caterpillar C15 Generator

Newly Listed
$187,500 USD
Newly Packaged CAT C15 Power Module; 2007 – 5 Test Hours; 500kW Standby Rated; 480/277V; Sound Attenuated Enclosure; Fuel Tank; Trailer Mounted; EMCP 4.2 Controller; Breaker; Zero Hour...
ConditionUsed
Usage5 Hours
Horse Power693 HP
Engine ModelCaterpillar C15
Emission RatingUSA Tier 2
Rear AxleTandem Axle
Stock Number1853
MLS Number14308978
CategoryGenerator Sets
Last Updated4/14/2026
Location
Spring, TX, US
Sold By
NineX Power Systems LLC
Hitachi Pad Mount 3 Phase Transformer

Hitachi Pad Mount 3 Phase Transformer

Newly Listed
At auction Apr. 14
Online Auction for Government Surplus - Auction Ends 04/22/2026 - To see full details, additional photos, and current bid, please open this link:, https://govdeals.bid/4cJnpBj , LOT# 3210...
Lot Number3210-503
ConditionUsed
Stock Number3210-503
MLS Number14308936
CategoryGenerator Sets
Last Updated4/14/2026
Location
West Chester, PA, US
Listed By
GovDeals, Inc.
Cummins 2500 KW Diesel Generator

2022 Cummins 2500 KW Diesel Generator

Newly Listed
$12,345,678 USD
New Cummins 2500 kW standby (2250 kW prime) diesel generator set model DQKAN, SN-I220141108. Cummins QSK60-G19 NR2 engine rated 3640 HP at 1800 RPM, SN-33228728, EPA Tier 2 emissions....
ConditionNew
Horse Power3640 HP
Engine ModelCummins QSK60-G19 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #5027
MLS Number14308872
CategoryGenerator Sets
Last Updated4/14/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Caterpillar C27 Diesel Generator

2024 Caterpillar C27 Diesel Generator

Newly Listed
$279,900 USD
New Caterpillar 800 kW standby (725 kW prime) diesel generator set, SN-GNF00195. CAT C27 engine rated 1214 HP at 1800 RPM, SN-MJE05535, EPA Tier 2 emissions. 3/60/277/480V. 1200 Amp...
ConditionNew
Horse Power1214 HP
Engine ModelCaterpillar C27
Emission RatingUSA Tier 2
Stock NumberCentral States #5032
MLS Number14308865
CategoryGenerator Sets
Last Updated4/14/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Caterpillar C27 Diesel Generator

2024 Caterpillar C27 Diesel Generator

Newly Listed
$279,900 USD
New Caterpillar 800 kW standby (725 kW prime) diesel generator set, SN-GNF00190. CAT C27 engine rated 1214 HP at 1800 RPM, SN-MJE05528, EPA Tier 2 emissions. 3/60/277/480V. 1200 Amp...
ConditionNew
Horse Power1214 HP
Engine ModelCaterpillar C27
Emission RatingUSA Tier 2
Stock NumberCentral States #5031
MLS Number14308863
CategoryGenerator Sets
Last Updated4/14/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins 625GFJB Natural Gas Generator

2007 Cummins 625GFJB Natural Gas Generator

Newly Listed
$159,900 USD
Cummins 625 kW standby natural gas generator set, model 625GFJB, SN-KX07H353619. Cummins GTA38 engine rated 803 HP at 1800 RPM. 3/60/277/480V, 12 lead reconnectable to other voltages....
ConditionUsed
Usage440 Hours
Horse Power803 HP
Engine ModelCummins GTA38
Stock NumberCentral States #5030
MLS Number14308840
CategoryGenerator Sets
Last Updated4/14/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators

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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