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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Showing 1 - 25 of 2,029 Generator Listings

1 - 25 of 2,029 listings
1 - 25 of 2,029 listings
Featured Item
Caterpillar 3406 Generator
9 0

1999 Caterpillar 3406 Generator

$36,534.98 USD
Auto Start, Cat Brand Genset, Circuit Breaker - 3 Pole, CSA Certification, Emissions Level, Engine Type - Diesel, Frequency - 60 Hz, Jacket Water Heater, Standard Voltage Regulator,
Inspection Report
ConditionUsed
Usage228 Hours
Stock NumberE240008HG
MLS Number13265280
CategoryGenerator Sets
Last Updated10/17/2025
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
Caterpillar C15 Generator
33 0

2018 Caterpillar C15 Generator

Newly Listed
Contact for price
8 Hour Integral Fuel Tank - Dual Wall, Auto Start, Base Tank, Base Type - Standard, Battery Charger, Battery Set - Standard, Cat Brand Genset, Control Panel - EMCP 4.2, Emissions Level,...
Inspection Report
ConditionUsed
Usage5,606 Hours
Stock Number10067793
MLS Number13907339
CategoryGenerator Sets
Last Updated10/18/2025
Location
Santiago, Chile
Sold By
Finning Chile S.A.
Caterpillar C32 Generator
3 0

2008 Caterpillar C32 Generator

Newly Listed
$283,819.44 USD
60 HZ, ANNUNCIATOR MODULE - LOCAL, AUTO START, CAT BRAND GENSET, CSA CERTIFICATION, DIESEL, EMCP 3.3 CONTROL PANEL, EPA LABEL, EPA STATIONARY EMERGENCY, Online Owner's Manual, STANDBY,
Inspection Report
ConditionUsed
Usage851 Hours
Stock NumberE230008E
MLS Number13907023
CategoryGenerator Sets
Last Updated10/18/2025
Location
Pointe-Claire, QC, Canada
Sold By
Toromont Power Systems
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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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