Generator Sets For Sale

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

Browse new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Quickly refine results with filters for hours, price, or year.
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 1,898 Generator Listings

1 - 25 of 1,898 listings
1 - 25 of 1,898 listings
Featured Item
2018 Atlas Copco QAS45T4FNB Generator

2018 Atlas Copco QAS45T4FNB Generator

Recently Updated
$15,000 USD
THIS ITEM IS BEING AUCTIONED FROM THE THOMAS HIRCHAK COMPANY IN MORRISVILLE, VT ITEM IS LOCATED AT 1878 CADYS FALLS ROAD IN MORRISVILLE, VT 05661. Online Auction Closes:Monday, December 29...
ConditionUsed
Usage1,357 Hours
MLS Number14025164
CategoryGenerator Sets
Last Updated12/30/2025
Location
Morrisville, VT, US
Sold By
Thomas Hirchak Company
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 Updated12/11/2025
Location
Pompano Beach, FL, US
Sold By
Pro Quip
Featured Item
Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!

Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!

$20,000 USD
FREE SHIPPING! (to most US states) NEW! Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NOW OFFERING EASY BUSINESS OR PERSONAL FINANCING! WE TAKE...
ConditionUsed
Usage2 Hours
Stock NumberTC1025472104DS200
MLS Number13953991
CategoryGenerator Sets
Last Updated12/22/2025
Location
Orem, UT, US
Sold By
Global Remarketing
Caterpillar XQ230 T4F Generator

2021 Caterpillar XQ230 T4F Generator

Recently Updated
$104,000 USD
Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual...
ConditionUsed
Usage6,097 Hours
Stock NumberRP15282
MLS Number14005948
CategoryGenerator Sets
Last Updated1/5/2026
Location
Midland, TX, US
Sold By
Warren Power Systems
Caterpillar XQ230 T4F Generator

2023 Caterpillar XQ230 T4F Generator

Recently Updated
$116,600 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz,...
ConditionUsed
Usage6,604 Hours
Stock NumberRP15452
MLS Number13885618
CategoryGenerator Sets
Last Updated1/5/2026
Location
Oklahoma City, TX, US
Sold By
Warren Power Systems
Caterpillar XQ230 T4F Generator

2019 Caterpillar XQ230 T4F Generator

Recently Updated
$100,750 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz,...
ConditionUsed
Usage6,566 Hours
Stock NumberRP14965
MLS Number13850302
CategoryGenerator Sets
Last Updated1/5/2026
Location
Amarillo, TX, US
Sold By
Warren Power Systems
Multiquip 180 Generator

2023 Multiquip 180 Generator

Recently Updated
$67,000 USD
110% Spill Containment, Battery Disconnect Switch, Camlocks, Emissions Level, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer,...
ConditionUsed
Usage7,345 Hours
Stock NumberRP15768
MLS Number13865841
CategoryGenerator Sets
Last Updated1/5/2026
Location
Abilene, TX, US
Sold By
Warren Power Systems
Caterpillar XQ125 T4F Generator

2023 Caterpillar XQ125 T4F Generator

Recently Updated
$55,000 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall...
ConditionUsed
Usage4,072 Hours
Stock NumberRP15449
MLS Number13821097
CategoryGenerator Sets
Last Updated1/5/2026
Location
Oklahoma City, OK, US
Sold By
Warren Power Systems
Caterpillar XQ425 T4F Generator

2019 Caterpillar XQ425 T4F Generator

Recently Updated
$161,600 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 50 /...
ConditionUsed
Usage7,809 Hours
Stock NumberRP14973
MLS Number13863314
CategoryGenerator Sets
Last Updated1/5/2026
Location
Tulsa, OK, US
Sold By
Warren Power Systems
Multiquip MQ180 T4F Generator

2018 Multiquip MQ180 T4F Generator

Recently Updated
$69,500 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Emissions Level, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer, Rating -...
ConditionUsed
Usage6,633 Hours
Stock NumberRP14385
MLS Number13821094
CategoryGenerator Sets
Last Updated1/5/2026
Location
Midland, TX, US
Sold By
Warren Power Systems
Multiquip MQ180 T4F Generator

2018 Multiquip MQ180 T4F Generator

Recently Updated
$60,000 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Emissions Level, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Hitch, Trailer,...
ConditionUsed
Usage6,328 Hours
Stock NumberRP14383
MLS Number13821090
CategoryGenerator Sets
Last Updated1/5/2026
Location
Tulsa, OK, US
Sold By
Warren Power Systems
Caterpillar XQ425 T4F Generator

2018 Caterpillar XQ425 T4F Generator

Recently Updated
$139,500 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank...
ConditionUsed
Usage7,364 Hours
Stock NumberRP14088
MLS Number13821089
CategoryGenerator Sets
Last Updated1/5/2026
Location
Midland, TX, US
Sold By
Warren Power Systems
Caterpillar XQ425 T4F Generator

2018 Caterpillar XQ425 T4F Generator

Recently Updated
$153,500 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall...
ConditionUsed
Usage6,213 Hours
Stock NumberRP14087
MLS Number13821086
CategoryGenerator Sets
Last Updated1/5/2026
Location
Amarillo, TX, US
Sold By
Warren Power Systems
Caterpillar 3412C 800KW Generator

2005 Caterpillar 3412C 800KW Generator

Recently Updated
$250,500 USD
Auto Start, Battery Charger, Battery Disconnect Switch, Engine Type - Diesel, Fire Extinguisher, Frequency - 60 Hz, Generator, Hitch, Trailer, Jacket Water Heater, Rating - Standby,...
ConditionUsed
Usage1,074 Hours
MLS Number13762663
CategoryGenerator Sets
Last Updated1/5/2026
Location
Jacksonville, FL, US
Sold By
Ring Power Corporation
Caterpillar 3516C Generator

2014 Caterpillar 3516C Generator

Recently Updated
$1,050,000 USD
134- WEIGHT: 30,000 LBS 158- WEIGHT: 70,000 LBS. SHIP, 2014 CATERPILLAR 3516C, 2500KW STANDBY, 13,800V (6-, 3516C DIESEL ENGINE, 165 HOURS,, AIR CLEANERS, EMCP 4.2 DIGITAL, ALTERNATOR, (3)...
ConditionUsed
Usage165 Hours
Stock NumberYEU0053
MLS Number13717140
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, KS, US
Sold By
Foley Equipment
Caterpillar 3516C Generator

2014 Caterpillar 3516C Generator

Recently Updated
$1,050,000 USD
134- WEIGHT: 30,000 LBS 158- WEIGHT: 70,000 LBS. SHIP, 2014 CATERPILLAR 3516C, 2500KW STANDBY, 13,800V (6-, 3516C DIESEL ENGINE, 165 HOURS,, AIR CLEANERS, EMCP 4.2 DIGITAL, ALTERNATOR, (3)...
ConditionUsed
Usage165 Hours
Stock NumberYEU0054
MLS Number13717138
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, KS, US
Sold By
Foley Equipment
Caterpillar D3412 Generator

1999 Caterpillar D3412 Generator

Recently Updated
$99,500 USD
1200AMP MOUNTED CIRCUIT, 23.8 SQ FT RADIATOR, 24V ALTERNATOR, 750KW STANDBY @ 480V, Breaker, EMCP 2 PLUS CONTROLLER, ENCLOSED CAT 3412 PACKAGE, GENERATOR SET, Online Owner's Manual, STANDBY...
ConditionUsed
Usage980 Hours
Stock NumberYEU0049
MLS Number13769273
CategoryGenerator Sets
Last Updated1/5/2026
Location
Topeka, KS, US
Sold By
Foley Equipment
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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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