Generator Sets For Sale

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

Find deals on new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Filter by hours, price, or year to pinpoint the closest Generator that fits your budget.
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 1,880 Generator Listings

1 - 25 of 1,880 listings
1 - 25 of 1,880 listings
Featured Item
Multiquip MQ180 T4F Generator
5 0

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
Usage6,630 Hours
Stock NumberRP14385
MLS Number13821094
CategoryGenerator Sets
Last Updated12/16/2025
Location
Midland, TX, US
Sold By
Warren Power Systems
Featured Item
2023 GENERAC G-25 TRAILER MOUNTED 25KW GENERATOR - ISUZU DIESEL - ONLY 3,000 HOURS - LIKE NEW
26 0

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!
20 1

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 Updated11/22/2025
Location
Orem, UT, US
Sold By
Global Remarketing
Cummins DQCA Diesel Generator
10 0

2011 Cummins DQCA Diesel Generator

Newly Listed
$99,900 USD
Cummins 600 kW standby (545 kW prime) diesel generator set, model DQCA, SN-F160968394. Cummins QSK23-G7 NR2 engine rated 1220 HP at 1800 RPM, EPA Tier 2 emissions, SN-85001880. 3/60/277/480V...
ConditionUsed
Usage159 Hours
Horse Power1220 HP
Engine ModelCummins QSK23-G7 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4856
MLS Number14044306
CategoryGenerator Sets
Last Updated12/16/2025
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DQGAB Diesel Generator
11 0

2011 Cummins DQGAB Diesel Generator

Newly Listed
$359,900 USD
Cummins 1500 kW standby (1350 kW prime) diesel generator set model DQGAB, SN-E110216880. Cummins QSK50-G4 engine rated 2220 HP at 1800 RPM, SN-25364170, EPA Tier 2 emissions. 3/60/277/480V...
ConditionUsed
Usage226 Hours
Horse Power2220 HP
Engine ModelCummins QSK50-G4
Emission RatingUSA Tier 2
Stock NumberCentral States #4894
MLS Number14044269
CategoryGenerator Sets
Last Updated12/16/2025
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DQGAB Diesel Generator
11 0

2011 Cummins DQGAB Diesel Generator

Newly Listed
$359,900 USD
Cummins 1500 kW standby (1350 kW prime) diesel generator set model DQGAB, SN-E110215517. Cummins QSK50-G4 engine rated 2220 HP at 1800 RPM, SN-25363491, EPA Tier 2 emissions. 3/60/277/480V...
ConditionUsed
Usage230 Hours
Horse Power2220 HP
Engine ModelCummins QSK50-G4
Emission RatingUSA Tier 2
Stock NumberCentral States #4893
MLS Number14044267
CategoryGenerator Sets
Last Updated12/16/2025
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins 2500 KW Diesel Generator
8 1

2026 Cummins 2500 KW Diesel Generator

Recently Updated
$1,349,900 USD
*****QTY 2 ETA Mar 2, 2026, QTY 2 ETA July 1, 2026, QTY 6 ETA Dec 31, 2026***** New Cummins 2500 kW standby (2250 kW prime) diesel generator set model DQKAN. Cummins QSK60-G19 NR2 engine...
ConditionNew
Horse Power3640 HP
Engine ModelCummins QSK60-G19 NR2
Emission RatingUSA Tier 2
Stock NumberCentral States #4335
MLS Number13387217
CategoryGenerator Sets
Last Updated12/16/2025
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
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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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