Generator Sets For Sale

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

Shop new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,450,000. Filter by hours, price, or year to find the right Generator closest to you.
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 1,919 Generator Listings

1 - 25 of 1,919 listings
1 - 25 of 1,919 listings
Featured Item
Caterpillar 3512 Generator

1986 Caterpillar 3512 Generator

$146,395.56 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
Cummins 2500 KW Diesel Generator

2025 Cummins 2500 KW Diesel Generator

Newly Listed
$1,349,900 USD
*****QTY 2 ETA Aug 3, 2026, QTY 6 ETA Dec 31, 2026***** New Cummins 2500 kW standby (2250 kW prime) diesel generator set model DQKAN. Cummins QSK60-G19 NR2 engine rated 3640 HP at 1800 RPM,...
ConditionNew
Horse Power3640 HP
Engine ModelCummins QSK60-G19 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4337
MLS Number14134740
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins 2500 KW Diesel Generator

2025 Cummins 2500 KW Diesel Generator

Newly Listed
$1,349,900 USD
*****ETA Feb 18, 2026 ***** New Cummins 2500 kW standby (2250 kW prime) diesel generator set model DQKAN, SN-J250501011. Cummins QSK60-G19 NR2 engine rated 3640 HP at 1800 RPM, SN-33240295,...
ConditionNew
Horse Power3640 HP
Engine ModelCummins QSK60-G19 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4336
MLS Number14134738
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Olympian G35F3S Generator

2001 Olympian G35F3S Generator

Newly Listed
$9,950 USD
Caterpillar / Olympian 35 kW standby (31.5 kW prime) propane generator set, model G35F3S, SN-NFS00242. Ford ESG642 engine rated 70 HP at 1800 RPM, SN-01-05-005300. /60/120/240V single...
ConditionUsed
Usage611 Hours
Horse Power70 HP
Engine ModelFord ESG642
Stock NumberCentral States #4831
MLS Number14134730
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Kohler 45RZG Generator

2001 Kohler 45RZG Generator

Newly Listed
$9,950 USD
Kohler 44 kW standby (40 kW prime) LP generator set model 45RZG, SN-0714341. GM 4.3L engine rated 75 HP at 1800 RPM, SN-13764. 1/60/120/240V single phase, 12 lead reconnectable to other...
ConditionUsed
Usage544 Hours
Horse Power75 HP
Engine ModelGM 4.3L
Stock NumberCentral States #4909
MLS Number14134727
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Katolight N45FGG4 Natural Gas Generator

2003 Katolight N45FGG4 Natural Gas Generator

Newly Listed
$9,900 USD
Katolight 45 kW standby (40 kW prime) natural gas generator set model N45FGG4, SN-LM344209 66403. GM 5.7L engine rated 88 HP at 1800 RPM, SN-8917060700. 1/60/120/240V 12 lead reconnectable...
ConditionUsed
Usage410 Hours
Horse Power88 HP
Engine ModelGM 5.7L
Stock NumberCentral States #4888
MLS Number14134723
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Generac SD048 Diesel Generator

2015 Generac SD048 Diesel Generator

Newly Listed
$14,900 USD
Generac 48 kW standby (43 kW prime) diesel generator set model SD048, SN-9527777. FPT F4GE9455B engine rated 88 HP at 1800 RPM, SN-J602-01251400. 1/60/120/240V single phase. 200 Amp...
ConditionUsed
Usage195 Hours
Horse Power88 HP
Engine ModelFPT F4GE9455B
Emission RatingUSA Tier 3
Stock NumberCentral States #4941
MLS Number14134722
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Caterpillar G55F3S Natural Gas Generator

2004 Caterpillar G55F3S Natural Gas Generator

Newly Listed
$14,900 USD
Caterpillar / Olympian 55 kW standby (50 kW prime) natural gas / propane generator set, model G55F3S, NGD00261. Ford WSG-1068 engine rated 112 HP at 1800 RPM, SN-06WS55265. 1/60/120/240V,...
ConditionUsed
Usage1,093 Hours
Horse Power112 HP
Engine ModelFord WSG-1068
Stock NumberCentral States #4832
MLS Number14134719
CategoryGenerator Sets
Last Updated2/10/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
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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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