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 1,871 results
1-25 of 1,871 results
Featured Item
Caterpillar XQ200 Generator
4 0

2014 Caterpillar XQ200 Generator

Call for price
Online Owner's Manual,
ConditionUsed
Usage7,540 Hours
Stock Number028220
MLS Number12272001
CategoryGenerator Sets
Last Updated2/24/2025
Location
San Diego, CA, US
Sold By

Hawthorne Power Systems

Featured Item
Caterpillar XQ30 Generator
11 0

2015 Caterpillar XQ30 Generator

$18,762 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 Updated2/24/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar 3512 Generator
13 0

1998 Caterpillar 3512 Generator

$325,417.16 USD
60 HZ, AUTO START, CAT BRAND GENSET, DIESEL, Online Owner's Manual, STANDBY,
ConditionUsed
Usage671 Hours
Stock NumberE210009A
MLS Number10860410
CategoryGenerator Sets
Last Updated2/24/2025
Location
Pointe-Claire, QC, Canada
Sold By

Toromont 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 Updated2/24/2025
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 Updated2/24/2025
Location
San Leandro, CA, US
Sold By

Peterson Power Systems

Featured Item
Caterpillar G20F3 Generator
4 0

2009 Caterpillar G20F3 Generator

$3,500 USD
ConditionUsed
Usage7 Hours
Stock NumberEQ027801
MLS Number12641755
CategoryGenerator Sets
Last Updated2/24/2025
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 Updated2/24/2025
Location
Miami, FL, US
Sold By

Pantropic Power

Featured Item
Caterpillar XQ 35 Generator
1 0

2023 Caterpillar XQ 35 Generator

$44,750 USD
110% Spill Containment, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer...
ConditionUsed
Usage2 Hours
Stock NumberRP15612
MLS Number13174651
CategoryGenerator Sets
Last Updated2/24/2025
Location
Midland, TX, US
Sold By

Warren Power Systems

Featured Item
Caterpillar XQ 1750 Generator
6 0

2000 Caterpillar XQ 1750 Generator

$685,000 USD
Package Type Dealer Packaged Unit,
ConditionUsed
Usage300 Hours
MLS Number12472297
CategoryGenerator Sets
Last Updated2/24/2025
Location
Fort Myers, FL, US
Sold By

Pantropic Power

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 Updated2/24/2025
Location
Knoxville, TN, US
Sold By

Stowers 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 Updated2/24/2025
Location
Miami, FL, US
Sold By

Pantropic Power

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 Updated2/24/2025
Location
Knoxville, TN, US
Sold By

Stowers Power Systems

Caterpillar C18 Generator
3 0

2008 Caterpillar C18 Generator

Recently Updated
$119,995 USD
600KW- COMPLETE ModelSR4B, Serial9F603025, Hertz60HzWires6 WireKilo Watts, 600 kW, MountedSkid, AR#272-6915, TIER 3. WITH 100 DAY LIMITED PARTS WARRANTY,
ConditionNew
Stock Number69073
MLS Number13353024
CategoryGenerator Sets
Last Updated3/2/2025
Location
Chicago, IL, US
Sold By

Diesel Sales

Caterpillar 3412 Generator
7 0

2001 Caterpillar 3412 Generator

Recently Updated
$132,995 USD
LIKE NEW ONLY 208 HOURS, CAT 750 COMPLETE Sound Enclosed with, Base Fuel Tank, with 100 day limited parts warranty Unit will be load tested before shipment.
ConditionUsed
Stock Number69145
MLS Number13353017
CategoryGenerator Sets
Last Updated3/2/2025
Location
Chicago, IL, US
Sold By

Diesel Sales

Cummins KTA38-G2 Generator
5 0

Cummins KTA38-G2 Generator

Recently Updated
$37,995 USD
LIKE NEW ONLY 250 HOURS ON EACH OF THESE TWO KTA3-G2 COMPLETE GENSETS. WITH WARRANTY. SELLING AS PACKAGE OF TWO AT $75,000.00 CALL OR SEND FOR DETAILS.
Quantity2
ConditionUsed
Stock Number69171
MLS Number13353015
CategoryGenerator Sets
Last Updated3/2/2025
Location
Chicago, IL, US
Sold By

Diesel Sales

Cummins 6CT8.3-G Generator
6 0

Cummins 6CT8.3-G Generator

Recently Updated
$16,995 USD
135 KW-COMPLETE GENSET LIKE NEW ONLY 300 HOURS SINCE NEW. engine driven radiator, base fuel tank, skid mounted, Control panel and breaker. 100 DAY LIMITED PARTS WARRANTY.
ConditionUsed
Stock Number69263
MLS Number13352990
CategoryGenerator Sets
Last Updated3/2/2025
Location
Chicago, IL, US
Sold By

Diesel Sales

Caterpillar 3516 Generator
9 0

2011 Caterpillar 3516 Generator

Newly Listed
$390,665.69 USD
Package Type Dealer Packaged Unit, Rebuild Dealer Rebuild,
ConditionUsed
Stock NumberG006147
MLS Number13428068
CategoryGenerator Sets
Last Updated3/2/2025
Location
Bremen, Germany
Sold By

ZEPPELIN POWER SYSTEMS

Caterpillar 3516 Generator
9 0

2011 Caterpillar 3516 Generator

Newly Listed
$390,665.69 USD
Package Type Dealer Packaged Unit, Rebuild Dealer Rebuild,
ConditionUsed
Stock NumberG006147
MLS Number13428067
CategoryGenerator Sets
Last Updated3/2/2025
Location
Bremen, Germany
Sold By

ZEPPELIN POWER SYSTEMS

Caterpillar 3516 Generator
9 0

2011 Caterpillar 3516 Generator

Newly Listed
$390,665.69 USD
Package Type Dealer Packaged Unit, Rebuild Dealer Rebuild,
ConditionUsed
Stock NumberG006147
MLS Number13428066
CategoryGenerator Sets
Last Updated3/2/2025
Location
Bremen, Germany
Sold By

ZEPPELIN POWER SYSTEMS

Atlas Copco QAS70 Generator
6 0

2023 Atlas Copco QAS70 Generator

Newly Listed
$58,000 USD
110% Spill Containment, Auto Start, Battery Charger, Battery Disconnect Switch, Coolant Heater, Emissions Level, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Jacket...
ConditionUsed
Usage1 Hours
Stock NumberEQ260369
MLS Number13427982
CategoryGenerator Sets
Last Updated3/2/2025
Location
Milford, MA, US
Sold By

Milton CAT Power Systems

Caterpillar XQ200 Generator
8 0

2014 Caterpillar XQ200 Generator

Newly Listed
$115,000 USD
ConditionUsed
Usage6,000 Hours
MLS Number13427973
CategoryGenerator Sets
Last Updated3/2/2025
Location
Tarrant, AL, US
Sold By

Thompson Tractor Co.

Caterpillar D100 Generator
7 0

2000 Caterpillar D100 Generator

Newly Listed
$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 Updated3/2/2025
Location
Jacksonville, FL, US
Sold By

Ring Power Corporation

Caterpillar C32 Generator
10 0

2024 Caterpillar C32 Generator

Newly Listed
Call for price
50 HZ, CAT BRAND GENSET, DIESEL, G001361; CAT C32; SN: ZAG00121; ARRG: 3431710; 2015; 0 V; 0 KVA; STANDBY; 1500 RPM; 0 HZ; 0 HOURS; CONDITION: PREMIUM PRE-OWNED ; NOTES: DIESEL ENGINE CAT...
ConditionUsed
Stock NumberG005513
MLS Number13427951
CategoryGenerator Sets
Last Updated3/2/2025
Location
Bremen, Germany
Sold By

ZEPPELIN POWER SYSTEMS

Caterpillar G3512 Generator
3 0

2012 Caterpillar G3512 Generator

Newly Listed
Call for price
ConditionUsed
Usage57,000 Hours
Stock NumberG006658
MLS Number13427946
CategoryGenerator Sets
Last Updated3/2/2025
Location
Bremen, Germany
Sold By

ZEPPELIN POWER SYSTEMS

Caterpillar XQ230KVA Generator
6 0

2023 Caterpillar XQ230KVA Generator

Newly Listed
$99,500 USD
125C TEMP RISE OVER 40C AMB, 3 PHASE NEMA LOCK RECEPTACLE, 3POLE CB, 60 HZ 200 KW, 60HZ 480 VOLT (WYE), Base Type - Standard, CERTIFICATION AR, CLEAN EMISSIONS MOD INST, CONNECTION GP, EMCP4...
ConditionUsed
Usage968 Hours
Stock NumberYEU0008
MLS Number13427897
CategoryGenerator Sets
Last Updated3/2/2025
Location
Topeka, KS, US
Sold By

Foley Equipment

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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