Generator Sets For Sale

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

Browse new and used Generator Sets on MyLittleSalesman.com, with prices from $200 to $12,345,678. Quickly refine results with filters for hours, price, or year.
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 1,979 Generator Listings

1 - 25 of 1,979 listings
1 - 25 of 1,979 listings
Featured Item
Caterpillar XQ125 Generator

2019 Caterpillar XQ125 Generator

Recently Updated
$41,250 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Customer Value Agreement (CVA) 2-year/2,000-hour Customer Value Agreement (CVA), Emissions Level - EPA -...
ConditionUsed
Usage6,677 Hours
Stock NumberRP14959
MLS Number13004413
CategoryGenerator Sets
Last Updated4/23/2026
Location
Abilene, TX, US
Sold By
Warren Power Systems
Featured Item
Generator 20 KW 2016 Multiquip Diesel Portable Trailer Mounted 3 Ph 120 / 240/ 480V NON DEF!

Generator 20 KW 2016 Multiquip Diesel Portable Trailer Mounted 3 Ph 120 / 240/ 480V NON DEF!

$16,500 USD
Generator 20 KW 2016 Multiquip Diesel Portable Trailer Mounted 3 Ph 120v 240v 480v NON DEF! NOW OFFERING EASY BUSINESS FINANCING! WE TAKE TRADES!! Please call Gary with any questions or to...
ConditionUsed
Usage4,946 Hours
Stock NumberBC0426576100DS165
MLS Number14312454
CategoryGenerator Sets
Last Updated4/20/2026
Location
Orem, UT, US
Sold By
Global Remarketing
Featured Item
Caterpillar 3406 Generator

1981 Caterpillar 3406 Generator

$24,500 USD
Auto Start, Battery Charger, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel - Other, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, No Enclosure,...
ConditionUsed
Usage447 Hours
Stock NumberEU00183
MLS Number14099064
CategoryGenerator Sets
Last Updated4/15/2026
Location
Knoxville, TN, US
Sold By
Stowers Power Systems
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 Updated4/15/2026
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 Updated4/15/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
Featured Item
Caterpillar XQ0350 Generator

2014 Caterpillar XQ0350 Generator

$155,000 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
Usage5,491 Hours
Stock NumberUE01157
MLS Number11077982
CategoryGenerator Sets
Last Updated4/15/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
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 Updated4/15/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Cummins 1100DFLB Diesel Generator

2002 Cummins 1100DFLB Diesel Generator

Newly Listed
$99,900 USD
Cummins 1100 kW standby (900 kW prime) diesel generator set model DFLB, SN-D020361759. Cummins KTA50-G2 engine rated 1620 HP at 1800 RPM, SN-33151847. 3/60/277/480V. 1600 Amp main-line...
ConditionUsed
Usage2,269 Hours
Horse Power1620 HP
Engine ModelCummins KTA50-G2
Stock NumberCentral States #5034
MLS Number14328700
CategoryGenerator Sets
Last Updated4/23/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins C500N6B Natural Gas Generator

2017 Cummins C500N6B Natural Gas Generator

Newly Listed
$139,900 USD
*****ETA July 15, 2026*****Cummins 500 kW standby natural gas generator set, model C500N6B. Cummins GTA 28E engine rated 770 HP at 1800 RPM, SN-25426923, EPA certified. 3/60/277/480V, 12...
ConditionUsed
Usage285 Hours
Horse Power770 HP
Engine ModelCummins GTA 28E
Stock NumberCentral States #5041
MLS Number14328694
CategoryGenerator Sets
Last Updated4/23/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DFEJ Diesel Generator

2005 Cummins DFEJ Diesel Generator

Newly Listed
$69,900 USD
Cummins 450 kW standby (410 kW prime) diesel generator set, model DFEJ, SN-K050849457. Cummins QSX15-G9 NR2 engine rated 755 HP at 1800 RPM, EPA Tier 2 emissions. 3/60/277/480V, 12 lead...
ConditionUsed
Usage890 Hours
Horse Power755 HP
Engine ModelCummins QSX15-G9
Emission RatingUSA Tier 2
Stock NumberCentral States #5040
MLS Number14328681
CategoryGenerator Sets
Last Updated4/23/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins C150D6D Diesel Generator

2026 Cummins C150D6D Diesel Generator

Newly Listed
$59,900 USD
*****ETA Aug 31, 2026***** New Cummins 150 kW standby (135 kW prime) diesel generator set, model C150D6D. Cummins QSB7-G5 engine rated 324 HP at 1800 RPM, EPA Tier 3 emissions, SN-S99098939...
ConditionNew
Horse Power324 HP
Engine ModelCummins QSB7-G5
Stock NumberCentral States #5043
MLS Number14328677
CategoryGenerator Sets
Last Updated4/23/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins C100D6C Diesel Generator

2026 Cummins C100D6C Diesel Generator

Newly Listed
$49,900 USD
*****ETA Aug 24,2026***** New Cummins 100 kW standby (90 kW prime) diesel generator set, model C100D6C. Cummins QSB5-G13 NR3 engine rated 173 HP at 1800 RPM, EPA Tier 3 emissions....
ConditionNew
Horse Power173 HP
Engine ModelCummins QSB5-G13
Stock NumberCentral States #5042
MLS Number14328676
CategoryGenerator Sets
Last Updated4/23/2026
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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