Generator Sets For Sale

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

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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1-25 of 1,964 results
1-25 of 1,964 results
Featured Item
2021 MTU DS 100 Generator
17 0

2021 MTU DS 100 Generator

Newly Listed
$29,500 USD
MTU DS 100 GENERATOR SET., MODEL NO. 4R0120, ENGINE: OM924LA - MERCEDES BENZ 4CYL TURBO CHARGED, KVA: 100, PH-3 / 60HZ, VOLT: 120-208 400 AMP BREAKER, WIRE CONFIG: WYE, BASE TANK: ZBM...
Warranty
ConditionNew
Usage1 Hours
Horse Power330 HP
Engine ModelMercedes OM924LA
Emission RatingTIER 3
L x W148 x 52
Capacity100kva
Weight13,000LBS
Stock NumberPADS100
MLS Number13765602
CategoryGenerator Sets
Last Updated8/17/2025
Location
Huntingdon Valley, PA, US
Sold By

MidState Machinery LLC

Featured Item
Caterpillar XQ570 Diesel Generator
12 0

2020 Caterpillar XQ570 Diesel Generator

Recently Updated
$229,900 USD
Used Caterpillar XQ570 500 kW standby (455 kW prime) rental grade diesel generator, SN-ME500244. CAT C18 engine rated 779 HP at 1800 RPM, SN-CM800382, EPA Tier 4 Final emissions. ...
ConditionUsed
Usage2,009 Hours
Horse Power779 HP
Engine ModelCaterpillar C18
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4813
MLS Number13752166
CategoryGenerator Sets
Last Updated8/18/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Cummins DFEK Diesel Generator
10 0

2025 Cummins DFEK Diesel Generator

Newly Listed
$119,500 USD
New Cummins 500 kW standby (455 kW prime) diesel generator set, model DFEK, SN-F250460265. Cummins QSX15-G9 engine rated 755 HP at 1800 RPM, SN-80726310, EPA Tier 2 emissions. 3/60/277/480V...
ConditionNew
Horse Power755 HP
Engine ModelCummins QSX15-G9 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4010
MLS Number13762780
CategoryGenerator Sets
Last Updated8/18/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar C9 Diesel Generator
8 0

2025 Caterpillar C9 Diesel Generator

Newly Listed
$88,900 USD
New Caterpillar 250 kW standby (225 kW prime) diesel generator set, SN-RG300613. CAT C9 engine rated 480 HP at 1800 RPM, SN-, EPA Tier 3 emissions. 3/60/277/480V, 12 lead reconnectable to...
ConditionNew
Horse Power480 HP
Engine ModelCaterpillar C9
Emission RatingUSA Tier 3
Stock NumberCentral States #4814
MLS Number13755675
CategoryGenerator Sets
Last Updated8/18/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Multiquip DCA150 Generator
4 0

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 Updated8/12/2025
Location
West Columbia, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar APS100 - 208-240-480 Generator
4 0

2014 Caterpillar APS100 - 208-240-480 Generator

$6,779.29 USD
Auto Start, Hitch, Trailer, Jacket Water Heater,
ConditionUsed
Usage21,614 Hours
Stock NumberRE15005C
MLS Number13698101
CategoryGenerator Sets
Last Updated8/12/2025
Location
Brampton, ON, Canada
Sold By

Toromont Power Systems

Featured Item
Cummins 2500 KW Diesel Generator
10 1

2025 Cummins 2500 KW Diesel Generator

$1,349,900 USD
*****Just arrived***** New Cummins 2500 kW standby (2250 kW prime) diesel generator set model DQKAN, SN-E250449528. Cummins QSK60-G19 NR2 engine rated 3640 HP at 1800 RPM, SN-33238429, EPA...
ConditionNew
Horse Power3640 HP
Engine ModelCummins QSK60-G19 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4334
MLS Number13675903
CategoryGenerator Sets
Last Updated8/18/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar XQ35 Generator
8 0

2017 Caterpillar XQ35 Generator

$21,500 USD
Package Type Cat Standard Unit,
ConditionUsed
Usage4,406 Hours
MLS Number13674741
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar XQ35 Generator
10 0

2016 Caterpillar XQ35 Generator

$19,900 USD
Package Type Cat Standard Unit,
ConditionUsed
Usage4,885 Hours
MLS Number13671814
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar 3412 Generator
13 0

1995 Caterpillar 3412 Generator

Contact for price
Online Owner's Manual,
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated8/12/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar XQ-60 48KW Generator
8 0

2017 Caterpillar XQ-60 48KW Generator

$31,500 USD
110% SPILL CONTAINMENT, 3 WAY FUEL VALVE, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, COOLANT HEATER, DIESEL, DUAL WALL FUEL TANK, EARTH LEAKAGE...
ConditionUsed
Usage6,800 Hours
Stock NumberEU00101
MLS Number12098435
CategoryGenerator Sets
Last Updated8/12/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar XQ500 STEP DECK Generator
14 0

2010 Caterpillar XQ500 STEP DECK Generator

$226,000 USD
Package Type Dealer Packaged Unit,
ConditionUsed
Usage1,476 Hours
MLS Number13644387
CategoryGenerator Sets
Last Updated8/12/2025
Location
Garner, NC, US
Sold By

GREGORY POOLE POWER SYSTEMS

Featured Item
Caterpillar C32 Diesel Generator
12 1

2021 Caterpillar C32 Diesel Generator

$299,500 USD
New Caterpillar 1000 kW standby (910 kW prime) diesel generator SN-JSJ04792. CAT C32 engine rated 1502 HP at 1800 RPM, SN-PRH08985, EPA Tier 2 emissions. 3/60/277/480V. 1600 Amp main-line...
ConditionNew
Usage3 Hours
Horse Power1502 HP
Engine ModelCaterpillar C32
Emission RatingUSA Tier 2
Stock NumberCentral States #4729
MLS Number13590715
CategoryGenerator Sets
Last Updated8/18/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Doosan G325WCU-3A Diesel Generator
8 4

2012 Doosan G325WCU-3A Diesel Generator

$65,000 USD
2012 Doosan G325WCU-3A Generator, Only 4,472 Hrs., Cummins QSL9-GB Diesel Engine, Ready to Work!, Call Christopher Lillo 310~977~7903,
ConditionUsed
Usage4,472 Hours
Stock NumberCA05042025CL
MLS Number13558814
CategoryGenerator Sets
Last Updated7/22/2025
Location
Los Angeles, CA, US
Sold By

Lillo Machinery, Inc.

Featured Item
Caterpillar XQ200 Generator
4 0

2014 Caterpillar XQ200 Generator

$64,500 USD
Online Owner's Manual,
ConditionUsed
Usage9,596 Hours
Stock Number028220
MLS Number12272001
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator
8 0

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 Updated8/12/2025
Location
Eugene, OR, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar G3406TA Generator
1 0

2012 Caterpillar G3406TA Generator

$31,100 USD
Online Owner's Manual,
ConditionUsed
Usage9,985 Hours
Stock NumberRP11315
MLS Number10875205
CategoryGenerator Sets
Last Updated8/12/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
8 0

2014 Caterpillar XQ350 Mobile Power Module Generator Set

Contact for price
Online Owner's Manual,
ConditionUsed
Usage7,501 Hours
Stock Number028453
MLS Number12271997
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar 3516 RADIATOR Generator
5 0

2001 Caterpillar 3516 RADIATOR Generator

$5,000 USD
Inspection Report
ConditionUsed
Usage2,005 Hours
Stock NumberE16563
MLS Number13262221
CategoryGenerator Sets
Last Updated8/12/2025
Location
Florence, SC, US
Sold By

Blanchard Power Systems

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
12 0

2013 Caterpillar XQ350 Mobile Power Module Generator Set

$145,500 USD
CATERPILLAR XQ350 GENERATOR, Online Owner's Manual, SKID MOUNTED,
Inspection Report
ConditionUsed
Usage1,845 Hours
Stock NumberUE01271
MLS Number11379738
CategoryGenerator Sets
Last Updated8/12/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar 3516B Generator Set
5 0

1999 Caterpillar 3516B Generator Set

$340,000 USD
60 HZ, CAT BRAND GENSET, CONTINUOUS, DIESEL, EMCP II+, GENERATORS, LESS THAN 1000 SINCE NEW, Online Owner's Manual, PRIME, STANDBY, USED 3516B 2000KW 2500KVA 480V 3PH 60HZ OPEN SKID,
ConditionUsed
Usage1,000 Hours
MLS Number9118451
CategoryGenerator Sets
Last Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar G20F3 Generator
4 0

2009 Caterpillar G20F3 Generator

$3,500 USD
ConditionUsed
Usage7 Hours
Stock NumberEQ027801
MLS Number12641755
CategoryGenerator Sets
Last Updated8/12/2025
Location
Milford, MA, US
Sold By

Milton CAT Power Systems

Featured Item
Caterpillar 3516B Generator
7 0

2024 Caterpillar 3516B Generator

$565,000 USD
** ENGINE WARRANTY BY MFG, 1825KW PRIME RATING 480V 60HZ 1800RPM - 1600KW PRIME RATING 400V 50HZ 15000 RPM, 60 HZ, CAT BRAND GENSET, DIESEL, EMCP 3.2 CONTROL PANEL - JACKET WATER HEATER,...
ConditionUsed
MLS Number965992
CategoryGenerator Sets
Last Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ 1250 Generator
1 0

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 Updated8/12/2025
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
6 0

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 Updated8/12/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Did you find what you were looking for? Yes No

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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