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Winpower DE20I4-20 kW-Diesel-Isuzu Engine

…20 kW Standby; 18 kW Prime Power

This is an ideal generator for: spray-foam and agricultural applications.

Winpower DE line was designed specially for applications in spray foam, roofing, and agriculture-related industries. Compact dimensions allow for installation in tighter quarters than can be achieved with a traditional diesel standby unit. DE20 provides 20 kilowatts three-phase, and 17 kilowatts one-phase output. Harbors naturally-aspirated Isuzu 4-cylinder engine, and Stamford head (+/-1.5% auto voltage regulation). 1800 rpm operation. Standard controls include key start, hour meter, plus built-in low-oil, overspeed, and overtemp shutdowns. Controller upgrades possible (specify when ordering). Standard fuel tanks include: 1)Composite 32-gallon model; 2)Steel single-wall 30-gallon model; 3)Steel double-wall 30-gallon model - custom tanks also available from manufacturer by request. This diesel
generator is CARB approved, available to California residents.

  • Important: Please see the shipping tab for information regarding residential versus commercial deliveries.

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    Model:  DE20I4
    Price:  $9,715.50
    Available Options:
    Battery Charger:
    Engine Block Heater:
    Fuel Tank Size:

    Model Specs

    Manufacturer: Winpower
    Model #: DE20I4
    Color: NA
    Enclosure: No
    Engine Make: Isuzu
    Transfer Switch Included?: NA
    Price: $9,715.50

    Rated Power (1-Phase): 17 kW
    Rated Power (3-Phase): 20 kW
    kVa (1-Phase): 17
    kVa (3-Phase): 25
    Frequency: 60 Hz
    Rated Amps (1-Phase): 70
    Rated Amps (3-Phase 208-Volt): 69
    Rated Amps (3-Phase 240-Volt): 60
    Rated Amps (3-Phase 480-Volt): 30
    Rotor Poles: 4
    Mainline Circuit Breaker: 80 Amps(1-Phase)/80 Amps(208)/60 Amps(240)/30 Amps(480)

    Engine Type: Inline 4-Cylinder
    Intake Method: Injection
    Cylinder Block: Cast Iron
    HP/L: 32/2.2
    Number of Cylinders: 4
    Compression Ratio: 18.8:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Liquid
    Fan Type: Belt Driven
    Engine rpm: 1800
    Governor System: Mechanical
    Ignition System: Electronic
    Starter Voltage (DC): 12
    Battery Required (Volts/Cold-Cranking Amps): 12/650
    Fuel Type: Diesel
    Fuel Consumption (@ 50% Load): .90 Gallons/Hour
    Fuel Consumption (@ Full Load): 1.80 Gallons/Hour

    Convenience Features
    Automatic Voltage Regulation: Built-In
    Low-Voltage Shutdown: No
    High-Voltage Shutdown: No
    Low-Oil Shutdown: Yes
    Overspeed Shutdown: Yes
    High-Temperature Shutdown: Yes
    Starter-Overcrank Protection: No
    Low-Battery Protection: No
    Hour Meter: Yes

    Weight: 800 lbs
    Dimensions (Inches): 52.16L x 24W x 34.38H
    Decibels (@ 7 Meters/23 Feet): NA
    Compliance: 50-State US

    Additional Features
    Rubber mounts help shield against vibration
    Select from 32-gallon composite tank, single and double-wall 30-gallon steel tanks
    Standard key start
    Deep Sea controller upgrades available
    4-pole revolving-field brushless alternator
    250-hour oil/filter change interval


  • 1-year/1000-hours manufacturer limited warranty on generator
  • 1-year/unlimited-hours warranty on engine

  • Shipping

    The T-REX Free Shipping Pledge:
    The manufacturers we work with are large concerns that ship multiple items each day. This enables them to attain the best shipping rates available. T-REX passes these savings on to our customers by providing free shipping to any commercial or residential address in the continental United States. This is the T-REX pledge. We will adhere to it even when a freight carrier adds one-time or unanticipated shipping fees. Try obtaining these terms from another Internet-based generator seller. You will not find a more customer-friendly policy than ours.

    Residential Delivery:
    You need to inform us if your delivery will be going to a residential address. Freight companies need to know this because many residential areas can't be serviced by large semi trucks. The generator will instead be loaded onto a smaller truck tailored to home deliveries. A home which serves as a place of business (regardless of the presence of company name/signage), if located in a residential area, is still considered a residential address for shipping purposes. Please select the residential delivery option if applicable. T-REX agrees to pay all additional residential delivery costs, but to do so, we must be properly informed before shipping arrangements are made.

    To select your choice of residential or commercial delivery, please see the purchase options in the Add To Cart area.

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    T-Rex Generators distributes products from many different standby and portable generator manufacturers at substantially discounted prices. These represented companies include: Asco automatic transfer switches, Briggs & Stratton generators, Winco generators, Generac Generators, GenTran transfer switches, Reliance Controls Transfer Switches, and Zenith automatic transfer switches. T-Rex also carries Honda powered generators which have the same time-tested Honda engines as the substantially more expensive Honda generator brand units.