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 1,650 results
Featured Item
Olympian G25UH1 Generator
11 0

1999 Olympian G25UH1 Generator

Recently Updated
Call for price
ConditionUsed
Usage371 Hours
Stock NumberEU00141
MLS Number12740074
Last Updated5/30/2024
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Featured Item
Cummins 250DQAB Diesel Generator
12 1

1999 Cummins 250DQAB Diesel Generator

Recently Updated
$59,900 USD
Used Cummins 250 kW standby (225 kW prime) rental grade diesel generator set model DQAB, SN-H990965864. Cummins M11-G2 engine rated 380 HP at 1800 RPM, SN-34968845. 3/60/277/480V or 3/60/120...
ConditionUsed
Usage2,522 Hours
Horse Power380 HP
Engine ModelCummins M11-G2
Rear AxleTri Axle
Stock NumberCentral States #4453
MLS Number12690006
Last Updated5/28/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar C 2.2T Generator
2 0

2023 Caterpillar C 2.2T Generator

Recently Updated
$29,500 USD
Auto Start, Battery Charger, Cat Brand Genset, Circuit Breaker,
ConditionUsed
MLS Number12362371
Last Updated5/30/2024
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Featured Item
Caterpillar 3516B Generator
2 0

2024 Caterpillar 3516B Generator

Recently Updated
$540,500 USD
50 HZ, AUTO START, CAT BRAND GENSET, DIESEL, EMCP 4.2B CONTROL PANEL, GENERATORS, JACKET WATER HEATER, Online Owner's Manual, PERMANENT MAGNET GENERATOR, Rebuild Cat Certified Rebuild ,...
ConditionUsed
MLS Number11640890
Last Updated5/30/2024
Location
St. Augustine, FL, US
Sold By

Ring Power Corporation

Featured Item
Caterpillar XQ570 Diesel Generator
12 0

2021 Caterpillar XQ570 Diesel Generator

$269,900 USD
Used Caterpillar XQ570 500 kW standby (455 kW prime) rental grade diesel generator, SN-ME500429. CAT C18 engine rated 779 HP at 1800 RPM, SN-CM800662, EPA Tier 4 Final emissions. ...
ConditionUsed
Usage4,429 Hours
Horse Power779 HP
Engine ModelCaterpillar C18
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4475
MLS Number12786355
Last Updated5/28/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar XQ60 Generator
4 0

2020 Caterpillar XQ60 Generator

$30,000 USD
Remaining Factory Warranty 60 MONTHS/6000 HR PLATINUM ESC, INC DPF - EXP 11/20/25,
ConditionUsed
Usage5,201 Hours
Stock NumberER60KV15
MLS Number12772040
Last Updated5/20/2024
Location
New Stanton, PA, US
Sold By

Cleveland Brothers Equipment

Featured Item
Caterpillar XQ425 Diesel Generator
8 0

2018 Caterpillar XQ425 Diesel Generator

$219,900 USD
Used Caterpillar XQ425 375 kW standby (340 kW prime) rental grade diesel generator, SN-X8H00137. CAT C13 engine rated 518 HP at 1800 RPM, SN-NF300186, EPA Tier 4 Final emissions. ...
ConditionUsed
Usage1,698 Hours
Horse Power518 HP
Engine ModelCaterpillar C13
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4482
MLS Number12808267
Last Updated5/28/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
Caterpillar C4.4 Diesel Generator
12 1

2018 Caterpillar C4.4 Diesel Generator

$54,900 USD
Used Caterpillar XQ125 110 kW standby (100 kW prime) rental grade diesel generator, SN-CK500338. CAT C4.4 engine, SN-J9G00481, EPA Tier 4 Final emissions. 3/60/277/480V or 3/60/120/208V...
ConditionUsed
Usage8,958 Hours
Engine ModelCaterpillar C4.4
Emission RatingUSA Tier 4 Final
Rear AxleTandem Axle
Stock NumberCentral States #4456
MLS Number12709482
Last Updated5/28/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

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
Last Updated5/21/2024
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ60 Generator
8 0

2022 Caterpillar XQ60 Generator

$68,500 USD
60 HZ, BATTERY CHARGER, DIESEL, FUEL TANK, GENERATORS, MULTI-VOLTAGE, Online Owner's Manual, Package Type Cat Standard Unit, PRIME, Protection Full Factory Warranty,
ConditionUsed
Stock NumberINV264
MLS Number11992294
Last Updated5/21/2024
Location
Jackson, MS, US
Sold By

Puckett Machinery

Featured Item
Caterpillar XQ60 Generator
7 0

2021 Caterpillar XQ60 Generator

$24,500 USD
Auto Start, Cat Brand Genset, Engine Type - Diesel, Generator, Hitch, Trailer, Online Owner's Manual, Trailer Mounted, Transportability,
ConditionUsed
Usage5,780 Hours
Stock Number23-658
MLS Number12575624
Last Updated5/21/2024
Location
Henderson, NV, US
Sold By

Cashman Power Solutions

Featured Item
Caterpillar SR4B Generator
6 0

2001 Caterpillar SR4B Generator

$10,000 USD
Online Owner's Manual,
ConditionUsed
Stock NumberEPU10903
MLS Number10145186
Last Updated5/20/2024
Location
Indianapolis, IN, US
Sold By

MacAllister Machinery

Featured Item
Caterpillar G3406TA Generator
1 0

2012 Caterpillar G3406TA Generator

Call for price
Online Owner's Manual,
ConditionUsed
Usage9,985 Hours
Stock NumberRP11315
MLS Number10875205
Last Updated5/21/2024
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar C9 Diesel Generator
12 1

2011 Caterpillar C9 Diesel Generator

$69,900 USD
Used Caterpillar 300 kW standby (270 kW prime) diesel generator set, SN-C9E02559. CAT C9 engine rated 480 HP at 1800 RPM, SN-S9L03833, EPA Tier 3 emissions. 3/60/120/208V, 12 lead...
ConditionUsed
Usage140 Hours
Horse Power436 HP
Engine ModelCaterpillar C9
Emission RatingUSA Tier 3
Stock NumberCentral States #4459
MLS Number12730468
Last Updated5/28/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Featured Item
2023 Isuzu 4JB1 Generator
1 0

2023 Isuzu 4JB1 Generator

Call for price
Isuzu 4JB1 Generator .Please call for more details.
Quantity3
ConditionNew
MLS Number12560513
Last Updated5/14/2024
Location
Eads, TN, US
Sold By

GXP Diesel

Featured Item
Cummins KT19 500KW GeneratorSet
27 0

Cummins KT19 500KW GeneratorSet

$78,500 USD
Complete Ready to go!, Cummins Genset, Gen Set w/switch Gear, Min Circuit Breaker Panel, bulk oil tanks, baskets under trailer,, Rectifier for 110 Volt in 531 Tandem axle Fruehauf Van...
ConditionUsed
Usage12,365 Hours
MLS Number11862078
Last Updated5/8/2024
Location
Middleton, WI, US
Sold By

NORTHWESTERN STONE LLC

Stewart & Stevenson 400 KW Diesel Generator
2 0

Stewart & Stevenson 400 KW Diesel Generator

Newly Listed
Call for price
400kW Stewart Stevenson open skid mounted diesel generator set powered by a Detroit 12V71 engine, 299 hours on meter, 3 phase, 277/480V, 1800rpm, 60Hz. Engine Arrangement : 7123-7309,
ConditionUsed
Usage299 Hours
Engine ModelDetroit 12V71
Stock Number103500
MLS Number12903074
Last Updated5/30/2024
Location
Houston, TX, US
Sold By

Swift Equipment Solutions

Cummins 200 KW Generator
9 0

Cummins 200 KW Generator

Newly Listed
$23,500 USD
model DGFC-5690210, model serial H040680618, digital panel, unit mounted breaker, sound attenuated enclosure, nice clean unit,
ConditionUsed
Usage651 Hours
Engine ModelCummins 6cta8.3
MLS Number12902991
Last Updated5/30/2024
Location
Decatur, TX, US
Sold By

Industrial Diesel, Inc.

Cummins DFGB Diesel Generator
10 0

1994 Cummins DFGB Diesel Generator

Newly Listed
$49,900 USD
Used Cummins 600 kW standby (545 kW prime) diesel generator model DFGB, SN-E940542943. Cummins VTA28-G5 engine rated 900 HP at 1800 RPM, SN-25195588. 3/60/277/480V, 12 lead reconnectable to...
ConditionUsed
Usage1,108 Hours
Horse Power900 HP
Engine ModelCummins VTA28-G5
Stock NumberCentral States #4489
MLS Number12902945
Last Updated5/30/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Generac SD0150 Diesel Generator
11 0

2013 Generac SD0150 Diesel Generator

Newly Listed
$29,900 USD
Used Generac 150 kW standby (135 kW prime) diesel generator set, model SD01500, SN-8484128. Iveco/FPT model F4HE9685A 6.7L, engine rated 240 HP at 1800 RPM, SN-J102-01098173, EPA Tier 3...
ConditionUsed
Usage258 Hours
Horse Power240 HP
Engine ModelF4HE9685A 6.7L
Emission RatingUSA Tier 3
Stock NumberCentral States #4497
MLS Number12902898
Last Updated5/30/2024
Location
Waukesha, WI, US
Sold By

Central States Diesel Generators

Caterpillar 150 KW Generator
1 0

2013 Caterpillar 150 KW Generator

Recently Updated
$49,500 USD
2013 Caterpillar 150KW portable generator. Perkins power. 4000 hours. 3 phase. 480v/240v. Will be serviced and job ready. $49,500,
ConditionUsed
Usage7,700 Hours
MLS Number12622740
Last Updated5/30/2024
Location
White City, OR, US
Sold By

SG Wilson Truck and Equipment Inc

Caterpillar 3512B Generator
1 0

2024 Caterpillar 3512B Generator

Newly Listed
$647,500 USD
Auto Start, Cat Brand Genset, Control Panel - EMCP 4.2B, Frequency - 50 / 60 Hz, Generator, Jacket Water Heater, Rebuild Cat Certified Rebuild,
ConditionUsed
MLS Number12902028
Last Updated5/30/2024
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar 3516 B Generator
1 0

2024 Caterpillar 3516 B Generator

Newly Listed
$540,500 USD
Auto Start, Base Type - Skid, Cat Brand Genset, Control Panel - EMCP 4.2B, Frequency - 50 Hz, Generator, Jacket Water Heater, Rating - Standby,
ConditionUsed
MLS Number12902027
Last Updated5/30/2024
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar C 27 Generator
19 0

2014 Caterpillar C 27 Generator

Newly Listed
$238,000 USD
ConditionUsed
Usage168 Hours
Stock NumberEPU11273
MLS Number12901990
Last Updated5/30/2024
Location
Indianapolis, IN, US
Sold By

MacAllister Machinery

Caterpillar 3508B Generator
2 0

1999 Caterpillar 3508B Generator

Recently Updated
$169,500 USD
Auto Start, Battery Charger, Cat Brand Genset, Circuit Breaker - 3 Pole, Control Panel - EMCP 4.4 Paralleling, Enclosure Lights, Enclosure Material - Aluminum, Engine Type - Diesel,...
ConditionUsed
Usage1,099 Hours
MLS Number12866801
Last Updated5/30/2024
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

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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