Generator Sets For Sale

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

Browse 1,918 new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Filter by hours, price, or year to lock in the right 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 1,918 Generator Listings

1 - 25 of 1,918 listings
1 - 25 of 1,918 listings
Featured Item
2001 Caterpillar 3412PKGG 700KW 480V Generator

2001 Caterpillar 3412PKGG 700KW 480V Generator

Newly Listed
$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

$145,182.58 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 Updated1/21/2026
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
SQUARE D Enclosed Switch Gear 15KV Rated, 7 1200amp motorized vacuum breakers + 1 spare, SEL controls, lockout relays

2004 SQUARE D Enclosed Switch Gear 15KV Rated, 7 1200amp motorized vacuum breakers + 1 spare, SEL controls, lockout relays

Newly Listed
At auction Feb. 16
Online Auction for Government Surplus - Auction Ends 02/25/2026 - To see full details, additional photos, and current bid, please open this link:, https://govdeals.bid/4kDcKul LOT#...
Lot Number29641-13
ConditionUsed
Stock Number29641-13
MLS Number14146586
CategoryGenerator Sets
Last Updated2/16/2026
Location
Glenwood, IA, US
Listed By
GovDeals, Inc.
40KW Open Frame Diesel Generator - New Custom Manufactured

40KW Open Frame Diesel Generator - New Custom Manufactured

Recently Updated
$20,600 USD
40KW / 40,000W Open Frame Diesel Generator – Final Tier IV Standard Base Unit: , 40KW or 40,000W , Single Phase Option – 333A @ 120VAC / 166A @ 240VAC , Three Phase Option –...
Warranty
Quantity6
ConditionNew
Horse Power75 HP
Engine Model4H50TIC
Emission RatingTier 4 Final
L x W58 x 27
Weight990
Stock NumberMSS40_4HMFT
MLS Number11990296
CategoryGenerator Sets
Last Updated2/16/2026
Location
Columbus, NJ, US
Sold By
Melton Industries
25KW Open Frame Diesel Generator - New Custom Manufactured

25KW Open Frame Diesel Generator - New Custom Manufactured

Recently Updated
$18,375 USD
25KW / 25,000W Open Frame Diesel Generator – Final Tier IV Standard Base Unit: , 25KW or 25,000W , Single Phase Option – 208A @ 120VAC / 104A @ 240VAC , Three Phase Option –...
Warranty
Quantity10
ConditionNew
Horse Power56 HP
Engine Model3H50TIC
Emission RatingTier 4 Final
L x W54 x 27
Weight975
Stock NumberMSS25_3HMFT
MLS Number11990310
CategoryGenerator Sets
Last Updated2/16/2026
Location
Columbus, NJ, US
Sold By
Melton Industries
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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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