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Generators for Rent

United Rentals carries an extensive selection of generators for rent, including portable gas generators and diesel generators of varying outputs and fuel capacities to suit your needs.

For our full list of generators for rent, view the items below. For more information about generators, visit our resource section.

White and black Generac Mobile diesel powered generator
Cat Class Code
240-3111

13 kW Towable Generator, Tier 4 Diesel

  • 13 kW
  • Towable generator
  • Tier 4 diesel
  • 240V
  • Uses: Ideal for smaller jobsites and applications, like powering trailers or project equipment
White Multiquip towable diesel powered generator attached to trailer

Lower Diesel Emissions

Cat Class Code
240-3127

11-22 kW Towable Generator, Tier 4 Diesel

  • 11-22 kW
  • Towable generator
  • Tier 4 diesel
  • 120/240V
  • Uses: Ideal for powering commercial trailers, worksites or special events
White Wacker-Neuson 20kW towable generator
Cat Class Code
240-3131

20-25 kW Towable Generator, Tier 4 Diesel

  • 20-25 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for temporary or mobile jobsites, events and projects
White Multiquip towable tier 4 diesel powered generator attached to trailer

Lower Diesel Emissions

Cat Class Code
240-3132

16-25 kW Towable Generator, Tier 4 Diesel

  • 16-25 kW
  • Towable generator
  • Tier 4 diesel
  • 240/480/600V
  • Uses: Ideal as a temporary power solution, like powering equipment and tools
White Allmand Generator

Lower Diesel Emissions

Cat Class Code
240-3137

24-30 kW Towable Generator, Diesel

  • 24-30 kW
  • Towable generator
  • Diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal as a remote power solution or emergency backup
White Multiquip towable tier 4 diesel powered generator attached to trailer with compartment doors open

Lower Diesel Emissions

Cat Class Code
240-3147

30-35 kW Towable Generator

  • 30-35 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for standby, backup, emergency or temporary power
White and black Generac Mobile Tier 4 diesel powered generator

Lower Diesel Emissions

Cat Class Code
240-3157

36-40 kW Towable Generator, Tier 4 Diesel

  • 36-40 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for flexible power applications and needs
Wacker white towable electric generator

Lower Diesel Emissions

Cat Class Code
240-3167

40-45 kW Towable Generator, Tier 4 Diesel

  • 40-45 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for powering commercial worksites and special events or as an emergency solution
Black and white JCB 70-80 KVA Tier 4 towable generator

Lower Diesel Emissions

Cat Class Code
240-3187

56-64 kW Towable Generator, Tier 4 Diesel

  • 56-64 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for heavy-duty applications with 24-hour run times
Generator Diesel 68-71 kW
Cat Class Code
240-3196

65-70 kW Towable Generator, Tier 4 Diesel

  • 65-70 kW
  • Towable generator
  • Tier 4 diesel
  • 120/208/240V or 277/480V depending on model
  • Uses: Ideal as an emergency energy or backup power solution, whether it's a hospital, office or construction site
White and black Generac Mobile 80kw towable generator

Lower Diesel Emissions

Cat Class Code
240-3212

80 kW Towable Generator, Tier 4 Diesel

  • 80 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for providing lasting energy or reliable backup power
Generator Pack Shot
Cat Class Code
240-3225

106 kW Towable Generator, Diesel

  • 106 kW
  • Towable generator
  • Diesel
  • 208/240/440/480V
  • Uses: Ideal as an emergency energy or backup power solution, whether it's a hospital, office or construction site
White 100kW Towable Diesel Generator
Cat Class Code
240-3231

100-119 kW Towable Generator, Diesel

  • 100-119 kW
  • Towable generator
  • Diesel power
  • 120/240V 1Ph, 277/480V 3Ph or 120/208V 3Ph
  • Uses: This 4-cycle diesel engine is ideal for jobsites that require maximum durability
Black and white JCB 125-149 KVA Tier 4 towable generator

Lower Diesel Emissions

Cat Class Code
240-3232

100-127 kW Towable Generator, Tier 4 Diesel

  • 100-127 kW
  • Towable generator
  • Tier 4 diesel
  • 277/480V, 139/240V or 120/208V 3Ph or 120/240V 1Ph
  • Uses: Ideal as a temporary power or emergency backup solution
White 125kW towable generator
Cat Class Code
240-3251

120-140 kW Towable Generator, Diesel

  • 120-140 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal as a remote or temporary power solution in a wide variety of jobsites
White 150kW towable generator
Cat Class Code
240-3256

150-159 kW Towable Generator, Diesel

  • 150-159 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal as a remote or temporary power solution in varying climates
White and red Cummins Tier 4 towable generator

Lower Diesel Emissions

Cat Class Code
240-3257

145-159 kW Towable Generator, Tier 4 Diesel

  • 145-159 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal as a remote or temporary power solution in varying climates
White 175kW Towable Generator
Cat Class Code
240-3286

175-199 kW Towable Generator, Diesel

  • 175-199 kW
  • Towable generator
  • Diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for maximum durability and reliability, with a 4-cycle diesel engine
White 200kW towable generator
Cat Class Code
240-3301

200-239 kW Towable Generator, Diesel

  • 200-239 kW
  • Towable generator
  • Diesel
  • 120/240V 1Ph, 277/480V 3Ph or 120/208V 3Ph
  • Uses: Ideal for versatile worksites that require durable equipment
White and red Cummins Tier 4 towable generator

Lower Diesel Emissions

Cat Class Code
240-3303

160-200 kW Towable Generator, Tier 4 Diesel

  • 160-200 kW
  • Towable generator
  • Tier 4 diesel
  • 208/240/480V
  • Uses: Ideal as an emergency energy or backup power solution, whether it's a hospital, office or construction site
White 250kW towable generator
Cat Class Code
240-3311

250-279 kW Towable Generator, Tier 3 Diesel

  • 250-279 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for standby, municipal and mobile applications
White and red Cummins 275 kW towable generator

Lower Diesel Emissions

Cat Class Code
240-3313

250-279 kW Towable Generator, Tier 4 Diesel

  • 250-279 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for powering large-scale applications, like construction sites and hospitals
White and red Cummins 300kW towable generator
Cat Class Code
240-3321

300-320 kW Towable Generator, Tier 4 Diesel

  • 300-320 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for large-scale applications, backup power or mobile projects.
White 500kW Industrial Mobile Generator
Cat Class Code
240-3410

480-549 kW Towable Generator, Tier 4 Diesel

  • 480-549 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: Ideal for powering large-scale applications, like construction sites and hospitals
White Cummins Tier 4 towable generator

Lower Diesel Emissions

Cat Class Code
240-3412

480-549 kW Towable Generator, Tier 3 Diesel

  • 480-549 kW
  • Towable generator
  • Tier 4 diesel
  • Voltages 120/208, 120/240, 277/480V based on model
  • Uses: This generator is Ideal for large-scale applications, like weddings and construction sites
White Multiquip Towable diesel generator
Cat Class Code
240-3711

175 kW Towable Generator, Diesel

  • 175 kW
  • Towable generator
  • #2 diesel fuel
  • 120/240V, 120/208V and 277/480V
  • Uses: Ideal for powering mid-size productions, concerts and special events
White and red Cummins 2,000 kW industrial mobile generator
Cat Class Code
240-4065

1,600-2,000 kW Towable Generator, Diesel

  • 1,600-2,000 kW
  • Towable generator
  • #2 diesel fuel
  • 480V standard, 600V optional
  • Uses: Ideal for providing lasting energy to large worksites, like construction sites or large offices
White and red 1,000 kW towable generator
Cat Class Code
240-4051

800-1,000 kW Towable Generator, Diesel

  • 800-1,000 kW
  • Towable generator
  • Diesel
  • 280/208V
  • Uses: Ideal for planned and unplanned utility outages, large industrial applications, and critical facilities seeking utility-grade power
White and red Cummins 1,500 kW industrial mobile generator
Cat Class Code
240-4060

1,200-1,500 kW Towable Generator, Diesel

  • 1,200-1,500 kW
  • Towable generator
  • Diesel
  • 277/240V
  • Uses: Ideal for powering large-scale applications, like construction sites and hospitals
White 1,600kW towable generator
Cat Class Code
240-4063

1,450-1,600 kW Towable Generator, Diesel

  • 1,450-1,600 kW
  • Towable generator
  • Diesel
  • 480V standard, 600V optional
  • Uses: Ideal for powering large events, construction sites or oil and gas operations
Blue Kustom Power Generator

Low Emissions

Cat Class Code
240-3130

Generator, 12-18 kVA, Natural Gas or Gas/LP

  • 12-18 kVA depending on model
  • Natural gas or gas/LP dual-fuel options may be available; models vary by location
  • Smooth, reliable and quiet operation
  • Forklift pockets for simple transportation and maximum versatility
  • Uses: Ideal for providing consistent power to homes and businesses or remote jobsites
White and black natural gas generator

Low Emissions

Cat Class Code
240-3133

Generator, 19-29 kVA, Natural Gas

  • 19-29 kVA depending on model
  • Natural gas powered generator
  • Smooth, reliable and quiet operation
  • Forklift pockets for simple transportation and maximum versatility
  • Uses: Ideal for providing consistent power to homes and businesses or remote jobsites
gray natural gas generator
Cat Class Code
240-3148

Generator, 40-44 kVA, Natural Gas

  • 40-44 kVA depending on model
  • Natural gas powered
  • Cleaner emissions compared to diesel-powered models
  • Forklift pockets for simple transportation and maximum versatility
  • Uses: Ideal for providing power to commercial buildings, industrial facilities and more
GENERATOR 60-69 KVA NG/LPG
Cat Class Code
240-3179

Generator, 60-69 kVA, Natural Gas or Gas/LP

  • 60-69 kVA depending on model
  • Natural gas or gas/LP dual-fuel options may be available; models vary by location
  • Cleaner emissions compared to diesel-powered models
  • Forklift pockets for simple transportation and maximum versatility
  • Uses: Ideal for providing power to commercial buildings, industrial facilities and more
Cat Class Code
240-3188

Generator, 70-84 kVA, Natural Gas

  • 70-84 kVA depending on model
  • Natural gas powered
  • Cleaner emissions compared to diesel-powered models
  • Forklift pockets for simple transportation and maximum versatility
  • Uses: Ideal for providing power to commercial buildings, industrial facilities and more
Portable Generator Pack Shot
Cat Class Code
240-2981

2,000-2,400 W Portable Generator, Gas

  • 2,000-2,400 watt output depending on model
  • 120V
  • 1 gallon fuel capacity
  • Inverter units may be available, depending on location
  • Uses: Ideal for light-duty jobs or use as an emergency power source
Yellow Wacker-Neuson portable inverter generator
Cat Class Code
240-2991

2,500-2,900 W Portable Generator, Gas

  • 2,500-2,900 watt output depending on model
  • 120V
  • 1-3.2 gallon fuel capacity depending on model
  • Inverter units may be available, depending on location
  • Uses: Ideal for light-duty jobs or use as an emergency power source
Portable Generator Pack Shot
Cat Class Code
240-3001

3,000-3,400 W Portable Generator, Gas

  • 3,000-3,400 watt output depending on model
  • 120/240V
  • 2.6-5.5 gallon fuel capacity depending on model
  • Inverter units may be available, depending on location
  • Uses: Ideal for powering tools such as compressors, grinders and fusion welders
Compact Generator Pack Shot
Cat Class Code
240-3006

3,500-3,900 W Portable Generator, Gas

  • Electronic ignition
  • Run time up to 5 hours on 1 tank of fuel
  • Gasoline powered
  • Built with heavy-duty frame
  • Uses: Ideal for powering tools or equipment for up to 5 hours on 1 tank of gas
  • Add this portable generator to your cart now
Portable Generator
Cat Class Code
240-3041

5,000-5,400 W Portable Generator, Gas

  • 5,000-5,400 watt output depending on model
  • 120/240V
  • 5.5-6.2 gallon fuel capacity depending on model
  • Inverter units may be available, depending on location
  • Uses: Ideal for powering tools such as compressors, grinders and fusion welders
Yellow Wacker-Neuson portable inverter generator
Cat Class Code
240-3051

5,500-5,900 W Portable Generator, Gas

  • 5,500-5,900 watt output depending on model
  • 120/240V
  • 5.5-6.6 gallon fuel capacity depending on model
  • Inverter units may be available, depending on location
  • Uses: Ideal for powering tools such as compressors, grinders and fusion welders
Red Multiquip portable inverter generator
Cat Class Code
240-3056

6,000-6,400 W Portable Generator, Gas

  • 6,000-6,400 W output depending on model
  • 120/240V
  • 5-7.3 gallon fuel capacity depending on model
  • Inverter units may be available, depending on location
  • Uses: Ideal for powering tools such as compressors, grinders and fusion welders
Yellow Wacker-Neuson portable inverter generator
Cat Class Code
240-3061

6,500-6,900 W Portable Generator, Gas

  • 6,500-6,900 watt output depending on model
  • 120/240V
  • 5-6.2 gallon fuel capacity depending on model
  • Inverter units available
  • Uses: Ideal for powering light towers and multiple tools or appliances
Black Mi-T-M portable inverter generator
Cat Class Code
240-3071

7,500-7,900 W Portable Generator, Gas

  • 7,500-7,900 watts output depending on model
  • 120/240V
  • 7.3 gallon fuel capacity
  • Electric starter type
  • Uses: Ideal for powering light towers and multiple tools or appliances
Orange and black Generac portable generator
Cat Class Code
240-3076

8,000-8,400 W Portable Generator, Gas

  • 8,000-8,400 watt output depending on model
  • 120/240V
  • 6.6-7.9 gallon fuel capacity depending on model
  • Electric and recoil starter type
  • Uses: Ideal for powering light towers and multiple tools or appliances
Yellow Wacker-Neuson portable inverter generator
Cat Class Code
240-3091

9,600-9,900 W Portable Generator, Gas

  • 9,600-9,900 watt output depending on model
  • 120/240V
  • 10 gallon fuel capacity
  • Electric starter type
  • Uses: Ideal for powering light towers and multiple tools or appliances
Cat Class Code
240-3101

10,000-11,900 W Portable Generator, Gas

  • 10,000-11,900 watt output depending on model
  • 120/240V
  • 16.4 gallon fuel capacity
  • Electric or recoil starter type
  • Uses: Ideal for powering light towers and multiple tools or appliances
Resources

FAQs About Generators

Rent portable, towable or commercial-sized generators from United Rentals to keep the power and work going through outages or to supply energy on remote jobsites. Our generators range in output from the smallest 2,000-watt generator to our heavy-duty 300-kilowatt generator and are packed with features like low emissions, reduced noise levels, trailer-mounted options and more. Our fleet of generators includes manufacturers like Honda, Generac, Multiquip, DeWalt and other trusted brands.

FAQs
What size generator do I need?

To determine what size generator to rent, you must first calculate the total wattage required. Combine the wattage from all the appliances you wish to power and add the highest single starting wattage to find what size generator you need.

How long can a generator run?

While this depends on the fuel capacity and the output of the generator, the average unit can run around 8-12 hours on a full tank of gas. As long as a generator is refilled with the necessary fuel, it can run for days at a time. However, while running a generator for days, weeks or even months at a time may be possible, it is not recommended. Just like any engine, a generator requires regular maintenance and routine lubrication to function at its best, and disregarding these tasks can cause permanent damage.

How much fuel does a generator typically use?

This will vary dramatically based on the generator and the load. The average 10-kilowatt generator will consume a little under a gallon an hour at full load, while a heavy-duty 200-kilowatt generator will likely consume up to 15 gallons per hour. Consult the product manual for detailed specifications on the generator’s fuel consumption rate.