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 1,948 results
1-25 of 1,948 results
Featured Item
2005 Caterpillar XQ-600 600KW 3412 Generator
3 0

2005 Caterpillar XQ-600 600KW 3412 Generator

Recently Updated
$190,000 USD
LOAD TESTED AS WELL AS OIL AND COOLANT SAMPLES TAKEN BY CAT DEALER. RESULTS ARE AVAILABLE TO REVIEW. EXCELLENT CONDITION. CALL OR E-MAIL TO ARRANGE FOR INSPECTION. REASONABLE OFFERS WILL BE...
ConditionUsed
Usage6,455 Hours
MLS Number13366322
CategoryGenerator Sets
Last Updated5/19/2025
Location
Syracuse,
Sold By

Granite Mining LLC

Featured Item
CKG780TVM3 Generator
8 0

2023 CKG780TVM3 Generator

$240,000 USD
Auto Start, Battery Charger, Battery Disconnect Switch, Camlocks, Coolant Heater, Emissions Level, Engine Governor, Engine Type - Diesel, Fire Extinguisher, Frequency - 60 Hz, Fuel Tank Type...
ConditionUsed
Usage51 Hours
MLS Number13051633
CategoryGenerator Sets
Last Updated4/30/2025
Location
Redmond, OR, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar XQ30 Generator
11 0

2015 Caterpillar XQ30 Generator

$17,000 USD
CATERPILLAR XQ30 GENERATOR, Horsepower 49.0 hp, Online Owner's Manual, TRAILER VIN #16MBB1311FG072685,
Inspection Report
ConditionUsed
Usage18,961 Hours
Stock NumberUE01350
MLS Number12165367
CategoryGenerator Sets
Last Updated4/30/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar 3412 Generator
10 0

1995 Caterpillar 3412 Generator

Call for price
Online Owner's Manual,
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated4/30/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Caterpillar D100 Generator
7 0

2000 Caterpillar D100 Generator

$17,500 USD
Auto Start, Base Type - Skid, Cat Brand Genset, Circuit Breaker - 3 Pole, Control Panel, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, No Enclosure, Rating -...
ConditionUsed
Usage738 Hours
MLS Number13427969
CategoryGenerator Sets
Last Updated4/30/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

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 Updated4/30/2025
Location
Midland, TX, US
Sold By

Warren 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 Updated4/30/2025
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 Updated4/30/2025
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 Updated4/30/2025
Location
Miami, FL, US
Sold By

Pantropic Power

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 Updated4/30/2025
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 Updated4/30/2025
Location
Fort Myers, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar OC30 Generator
8 0

2015 Caterpillar OC30 Generator

$36,500 USD
Online Owner's Manual, TRAILER MOUNTED,
ConditionUsed
Usage1,955 Hours
Stock NumberEQ145158
MLS Number11235441
CategoryGenerator Sets
Last Updated4/30/2025
Location
Milford, MA, US
Sold By

Milton CAT Power Systems

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 Updated4/30/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ350 Mobile Power Module Generator Set
8 0

2013 Caterpillar XQ350 Mobile Power Module Generator Set

$89,500 USD
Online Owner's Manual,
ConditionUsed
Usage13,810 Hours
Stock Number028452
MLS Number12271996
CategoryGenerator Sets
Last Updated4/30/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ230 T4F Generator
8 0

2019 Caterpillar XQ230 T4F Generator

Call for price
Online Owner's Manual,
ConditionUsed
Usage703 Hours
Stock NumberEU00120
MLS Number12030926
CategoryGenerator Sets
Last Updated4/30/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Kohler 400REOZJ Diesel Generator
1 1

2015 Kohler 400REOZJ Diesel Generator

Newly Listed
$75,900 USD
Used Kohler 400 kW standby (365 kW prime) diesel generator set, model 400REOZJB, SN-SGM32CWK4. John Deere 6135HFG84A engine rated 617 HP at 1800 RPM, SN-RG6135L030110, EPA Tier 3 emissions....
ConditionUsed
Usage190 Hours
Horse Power617 HP
Engine ModelJohn Deere 6135HFG84A
Emission RatingUSA Tier 3
Stock NumberCentral States #4722
MLS Number13590752
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Kohler 230REOZJE Diesel Generator
11 1

2016 Kohler 230REOZJE Diesel Generator

Newly Listed
$45,900 USD
Used Kohler 230 kW standby (205 kW prime) diesel generator set, model 230REOZJE, SN-SGM32GCLC. John Deere 6090HF484 engine rated 346 HP at 1800 RPM, SN-RG6090L126459, EPA Tier 3 emissions....
ConditionUsed
Usage1,478 Hours
Horse Power346 HP
Engine Model6090HF484
Emission RatingUSA Tier 3
Stock NumberCentral States #4723
MLS Number13590748
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Cummins DFCC Diesel Generator
8 1

1999 Cummins DFCC Diesel Generator

Newly Listed
$33,900 USD
Used Cummins 350 kW standby (315 kW prime) diesel generator set, model 350DFCC, SN-A990854476. Cummins NTA-855-G3 engine rated 535 HP at 1800 RPM, SN-11930136. 3/60/120/208V, 12 lead...
ConditionUsed
Usage889 Hours
Horse Power535 HP
Engine ModelCummins NTA-855-G3
Stock NumberCentral States #4702
MLS Number13590746
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Detroit 250DSE Diesel Generator
11 1

2004 Detroit 250DSE Diesel Generator

Newly Listed
$29,900 USD
Used Detroit Diesel Spectrum 265 kW standby (240 kW prime) diesel generator set, model 250DSE, SN-0789290. Detroit Diesel Series 60 12.7L engine rated 490 HP at 1800 RPM, SN-06R0766346. ...
ConditionUsed
Usage955 Hours
Horse Power490 HP
Engine ModelSeries 60 12.7L
Stock NumberCentral States #4704
MLS Number13590741
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Caterpillar C15 Diesel Generator
8 0

2011 Caterpillar C15 Diesel Generator

Newly Listed
$79,900 USD
Used Caterpillar 400 kW standby (365 kW prime) diesel generator set, SN-C5E03184. CAT C15 engine rated 619 HP at 1800 RPM, SN-FTE00511, EPA Tier 3 emissions. 3/60/277/480V, 12 lead...
ConditionUsed
Usage573 Hours
Horse Power619 HP
Engine ModelCaterpillar C15
Emission RatingUSA Tier 3
Stock NumberCentral States #4728
MLS Number13590720
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Caterpillar C32 Diesel Generator
8 0

2021 Caterpillar C32 Diesel Generator

Newly Listed
$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
Horse Power1502 HP
Engine ModelCaterpillar C32
Emission RatingUSA Tier 2
Stock NumberCentral States #4729
MLS Number13590715
CategoryGenerator Sets
Last Updated5/20/2025
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

QTY OF (2) EU2000I Generator
4 0

QTY OF (2) EU2000I Generator

Newly Listed
At auction May. 22
PORTABLE GENERATOR, Â1-PHASE, GAS
ConditionUsed
Stock Number482233
MLS Number13590481
CategoryGenerator Sets
Last Updated5/20/2025
Location
Lima, OH, US
Listed By

Jeff Martin Auctioneers

GA-6HB Generator
7 0

GA-6HB Generator

Newly Listed
At auction May. 22
MULTIQUIP PORTABLE GENERATOR, 1-PHASE, HONDA, GAS, 60HZ,
ConditionUsed
Stock Number482223
MLS Number13590462
CategoryGenerator Sets
Last Updated5/20/2025
Location
Lima, OH, US
Listed By

Jeff Martin Auctioneers

GA-6HB Generator
7 0

GA-6HB Generator

Newly Listed
At auction May. 22
MULTIQUIP PORTABLE GENERATOR, 1-PHASE, HONDA, GAS, 60HZ,
ConditionUsed
Stock Number482222
MLS Number13590457
CategoryGenerator Sets
Last Updated5/20/2025
Location
Lima, OH, US
Listed By

Jeff Martin Auctioneers

GA-6HR Generator
8 0

GA-6HR Generator

Newly Listed
At auction May. 22
MULTIQUIP PORTABLE GENERATOR, 1-PHASE, HONDA, GAS, HOUR METER READS: 1155
ConditionUsed
Stock Number482221
MLS Number13590454
CategoryGenerator Sets
Last Updated5/20/2025
Location
Lima, OH, US
Listed By

Jeff Martin Auctioneers

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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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