Best Commercial Generators

Best Commercial Generators

Top-Rated & Best-Selling Professional Generators

Jared, the Generator Expert
By 
Generator Expert

Commercial generators are in a league of their own, and many people might be overwhelmed by the many different kinds. That's why we put together the Best Commercial Generators of 2021 based on our best-selling, highest-rated models with expert recommendations to ensure you get the perfect unit for your needs. 

 

If you're not sure what kind of commercial generator you need, check out our Commercial Generator Buyer's Guide to get started and come back to the list for an expert recommendation. You can also peruse our other lists of Best Electric Generators.



 

Best Commercial Generators List

You can scroll down through the full list of the best commercial generators, or simply click on the one you want to see right away.

Best Commercial Portable Generator

1
Learn More About Kubota GL7000
$5,849.00
Expert Review
The Kubota GL7000, with its 479cc Kubota Z482 liquid-cooled diesel engine, is by far one of the best professional generators available. This model is primarily used on job sites, but can also be used for home applications with a 2-wire automatic transfer switch. The large 7.4-gallon fuel tank will provide up to 10 hours of run time. A large capacity oil pan provides oil change intervals up to 200 hours, and, with a dual-element air filter design, it can handle those dusty conditions found on construction sites. If you are looking for a top quality generator that has multiple uses, look no further than our "best" recommended unit.
Features
Kubota Low Boy II Industrial Diesel Generator
  • Quieter, more compact & cleaner (EPA Tier IV) than original Low Boy
479cc Kubota Z482 Liquid-Cooled Diesel Engine
  • Large capacity oil pan provides oil change intervals up to 200 hours
  • Dual-element air filter design for heavy-duty jobs in dusty conditions
Keyed Electric Start (Battery Included)
  • Starter safety relay prevent starter from engaging after start-up
Compact Design & Easy Maintenance
  • By direct coupling the engine crankshaft w/ cooling fan
  • Simple maintenance of oil, fuel, battery & cooling water on One side
Large Capacity 7.4 Gallon Diesel Fuel Tank
  • Provides up to 10 hours @ 100% load on a single fill-up


Best Commercial Standby Generator

2
Learn More About Generac Protector RG02724ANAX
$12,397.00
Expert Review
The Generac 27KW QS is a great 25kW liquid-cooled generator. This model sells the best for a few reasons: It is powered by a Generac 2.4L 4-Cylinder Liquid-Cooled Engine. It lets you power all of your high-wattage household appliances & 2 AC units. It is equipped with an 5-year warranty
Features
Protector® QS Series Premium-Grade Standby Generator
  • Designed for luxury homes & small commercial buildings
  • Runs off natural gas or LP fuel source
Includes Mobile Link™ Wi-Fi / Ethernet Connectivity*
  • Monitor generator status on a smart phone, tablet or PC
  • *Requires internet connection
Quiet-Test™
  • Low-speed exercise mode for quieter weekly tests; 61 dB @ 23'
Multi-Lingual Evolution™ Controller
  • Two-Line LCD Display provides service & maintenance intervals
Automotive-Style Engine
  • Operates at half the speed of other engines (1800 vs 3600 RPM)
  • Powerful Generac in-line 4-cylinder liquid-cooled engine


Best Skid-Mount Generator

3
Learn More About Generac MDG25IF4-STD
$25,999.00
Features
  • Designed & engineered for optimum performance & reliability
  • Marathon Electric® Brushless Alternator - Multi-Phase Output
    • Three-Phase: 20 kW / 25 kVA (Prime), 25 kW / 31 kVA (Standby)
    • Single-Phase: 20 kW / 20 kVA (Prime), 25 kW / 25 kVA (Standby)
    PM600 Voltage Regulator Voltage Regulator
    • Provides Voltage regulation of +/- 0.5% for cleaner power
    3-Position Voltage Selector Switch
    • Single Phase - 120/240V Zig Zag, 3-Phase - 120/208V Low Wye & 3-Phase 277/480V High Wye
    2.2L Isuzu® Turbocharged, After-Cooled Diesel Engine (EPA Tier 4 Final)
    • Fuel efficient design runs at 1800 RPM for extended engine life
    • Rubber vibration dampers isolate engine/generator from frame for quieter operation
    56-Gallon Polyethylene Internal Fuel Tank w/ 3.5" Fill Port
    • Provides up to 28 hours of run time @ 100% load


    Best Commercial Mobile Generator

    4
    Learn More About Cummins Onan A063B622
    $6,066.00
    Features
    7.0 kW QG EVAP Commercial Mobile Generator (120/240V - 30A)
    • Quietest and lowest vibration generator set in its class
    • Designed for tough commercial applications - Runs (2) ACs
    Cummins Onan 4-Cycle OHV V-Twin Engine (.72 Gal/H @ 1/2 Load)
    • Allows for start & run without AC output to conserve fuel
    Microprocessor Controlled w/ Automatic Safety Shutdowns
    • Digital voltage regulatotion provides stabilty as loads change
    • Self-diagnostic capability to simplify troubleshooting
    Sound-Attenuating Enclosure w/ Thru Flow Cooling System
    • Lowers noise levels while providing cross-flow cooling
    Integral Control Panel w/ Waterproof Remote Connector
    • Instant one-touch stop switch & Remote disable/continuous stop capability


    Best Towable Generator

    5
    Learn More About Generac MLG15M-STD2
    $14,999.00
    Features
    Generac Mobile MLG15KM Mobile Diesel Generator
    • Designed & engineered for optimum performance & reliability
    Marathon Electric Brushless Alternator - Single-Phase Output
    • Prime - 13 kW / 13 kVA (54A @ 240V)
    • Standby - 14 kW / 14 kVA (58A @ 240V)
    Marathon SE350 Voltage Regulator
    • Provides Voltage regulation of +/- 1% for cleaner power
    1.75L Mitsubishi® S4L2 Liquid Cooled Diesel Engine (EPA Tier 4 Final)
    • Fuel efficient design runs at 1800 RPM for extended engine life
    • Rubber vibration dampers isolate engine/generator from frame for quieter operation
    56-Gallon Polyethylene Internal Fuel Tank w/ 3.5" Fill Port
    • Provides up to 86 hours of run time @ 50% load
    • Provides up to 43 hours of run time @ 100% load


    Best Mobile Light Tower Generator

    6
    Learn More About Generac MLT4060KV-STD
    $13,999.00
    Features
    MLT4060KV-STD - 6kW Vertical Mast Light Tower (KubotaŽ / Electric Winch)
    • Designed & engineered for optimum performance, reliability and longevity
    4 x 1000-Watt Metal Halide Lamps
    • Provides light coverage for up to 7 acres; Individual On/Off switches
    • Oval aluminum reflectors w/ tempered glass lens & silicone gaskets
    • Friction disc mounting for tool less positioning
    23-Foot, 5-Section Vertical Mast w/ Electric Winch
    • Allows for quick setup, Raises mast in 15 seconds
    • Vertical mast allows for more compact storage and transportation
    359° Ground-Level Mast/Fixture Rotation w/ Locking System
    • Distinctive angle fixture mount for common light distribution
    1.0L KubotaŽ D1005 Liquid Cooled Diesel Engine (EPA Tier 4 Final)
    • Fuel efficient design runs at 1800 RPM for extended engine life


    Best Prime Power Generator

    7
    Learn More About Gillette SP-3000-3-3
    Call 1 (800) 800-3317 for pricing and order information.
    Features
    Gillette SP-3000 Emergency Standby Generator
    • For commercial applications with 120/240V 3-Phase service
    • Please contact us for additional voltage options
    300 kW (NG) or 170 kW (LPG) Standby Rating
    • Rungs on cleaning burning Natural Gas or Liquid Propane (LPG)
    14.6L Power Solutions (PSI) 8-Cylinder Liquid Cooled Engine
    • Provides long life, high performance, and great fuel efficiency
    • Electronic governor for precise isochronous frequency regulation
    Stamford Brushless Alternator (UL Certified)
    • Circuit-breaker protection, wired to gen-set
    • Self-ventilated and drip proof construction
    Automatic Voltage Regulation (+/- 1/2 %)
    • Solid state, frequency compensated design
    • Under-speed and Over-excitation protection



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    Jared, the Generator Expert
    By 
    Generator Expert
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