Generator Sets For Sale

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

Search new and used Generator Sets on MyLittleSalesman.com, with prices from $65 to $1,599,900. Filter by hours, price, or year to find the right Generator near you today.
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 1,957 Generator Listings

1 - 25 of 1,957 listings
1 - 25 of 1,957 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
Caterpillar 3512 Generator

1986 Caterpillar 3512 Generator

$144,356.96 USD
3 POLE CIRCUIT BREAKER, 60 HZ, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, EMCP 4.2 CONTROL PANEL, Online Owner's Manual, Package Type Cat Standard Unit, STANDBY,
ConditionUsed
Usage1,500 Hours
Stock NumberE220008L
MLS Number11814955
CategoryGenerator Sets
Last Updated3/12/2026
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 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
Cummins DQDAC Diesel Generator

2026 Cummins DQDAC Diesel Generator

Newly Listed
$92,900 USD
*****ETA June 26, 2026*****New Cummins 300 kW standby (270 kW prime) diesel generator set model DQDAC. Cummins QSL9-G7 engine rated 418 HP at 1800 RPM, EPA Tier 3 emissions. 3/60/120/208V,...
ConditionNew
Horse Power418 HP
Engine ModelCummins QSL9-G7
Emission RatingUSA Tier 3
Stock NumberCentral States #4974
MLS Number14257164
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DQDAA Diesel Generator

2006 Cummins DQDAA Diesel Generator

Newly Listed
$59,900 USD
Cummins 250 kW standby (225 kW prime) diesel generator set model DQDAA, SN-G060947258. Cummins QSL9-G3 NR3 engine rated 399 HP at 1800 RPM, EPA Tier 3 emissions, SN-46640232. 3/60/277/480V...
ConditionUsed
Usage231 Hours
Horse Power399 HP
Engine ModelCummins QSL9-G3
Stock NumberCentral States #4984
MLS Number14257090
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Kohler 100REZGD Natural Gas Generator

2012 Kohler 100REZGD Natural Gas Generator

Newly Listed
$19,900 USD
Kohler 100 kW standby natural gas / propane generator set model 100REZGD, SN-SGM32JT5Z. GM 5.7L engine rated 155 HP at 1800 RPM, SN-57L24667, EPA certified. 3/60/120/208V, 12 lead...
ConditionUsed
Usage405 Hours
Horse Power155 HP
Engine ModelGM 5.7L
Stock NumberCentral States #4986
MLS Number14257081
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DSHAC Diesel Generator

2005 Cummins DSHAC Diesel Generator

Newly Listed
$35,900 USD
Cummins 200 kW standby (180 kW prime) diesel generator set model DSHAC, SN-J050845933. Cummins QSL9-G2 engine rated 364 HP at 1800 RPM, EPA Tier 3 emissions, SN-46525369. 3/60/277/480V, 12...
ConditionUsed
Usage347 Hours
Horse Power364 HP
Engine ModelCummins QSL9-G2 NR3
Stock NumberCentral States #4988
MLS Number14257074
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DGDB Diesel Generator

2003 Cummins DGDB Diesel Generator

Newly Listed
$19,900 USD
Cummins 100 kW standby (90 kW prime) diesel generator set model DGDB, SN-G030523640. Cummins 6BT5.9-G6 engine rated 170 HP at 1800 RPM. 3/60/120/208V, 12 lead reconnectable to other...
ConditionUsed
Usage561 Hours
Horse Power170 HP
Engine ModelCummins 6BT5.9-G6
Stock NumberCentral States #5008
MLS Number14257068
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DGDA Diesel Generator

2000 Cummins DGDA Diesel Generator

Newly Listed
$17,900 USD
Cummins 80 kW standby (72 kW prime) diesel generator set model DGDA, SN-K000176362 Cummins 6BT5.9-G6 engine rated 166 HP at 1800 RPM. 3/60/120/208V, 12 lead reconnectable to 480V and other...
ConditionUsed
Usage728 Hours
Horse Power166 HP
Engine ModelCummins 6BT5.9-G6
Stock NumberCentral States #5007
MLS Number14257058
CategoryGenerator Sets
Last Updated3/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins C100N6 Natural Gas Generator

2022 Cummins C100N6 Natural Gas Generator

Newly Listed
$34,900 USD
New Cummins 100 kW standby natural gas / propane generator set, model C100N6, SN-H220127355. Cummins QSJ5.9G-G3 engine rated 162 HP at 1800 RPM, SN-LB008824, EPA certified. 3/60/120/208V,...
ConditionNew
Horse Power162 HP
Engine ModelCummins QSJ5.9G-G3
Stock NumberCentral States #5003
MLS Number14257049
CategoryGenerator Sets
Last Updated3/20/2026
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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