Winco DE20I4 – Diesel Generator...


If you’re a business owner or homeowner looking for serious 20kW power the DR20I4 is what you’ve been looking for! Winpower utilizes the Isuzu 2.2L engine which has been used in industrial applications for years to give end users the confidence of performance and reliability. Whether using this unit for standby or for prime power, you can rest assured you are getting the best product on the market.


Price Includes Freight to a Business Address – The customer is responsible for unloading merchandise upon delivery.


Printable Brochures:


ASCO 300 Series Transfer Switch


Voltage *

Automatic Transfer Switch

Transfer Switch Enclosure

NEMA 1 Enclosure Standard – NEMA 3R provides additional weather protection for outdoor use.

Generator Housing

14 gauge galvaneal steel with internal baffling and 1″ foam for sound attenuation and weather protection.

NFPA 110 Level 1

Excitation Boost System

Permanent Magnet Generator

Battery Charger

Generator Strip Heater


Group 24 650 CCA

DSE 7310 Controller Upgrades

Fuel Tank

All fuel tanks, except the 54 gallon, are double walled.


All fuel tanks, except the 54 gallon, are double walled.

Trailer Accessories



Generator Features 

  • WINPOWER had been Building Industrial Generators Since 1925
  • Built Stronger to Last Longer
  • Rubber Engine and Generator Vibrations Isolation Mounts
  • Experienced Engineering Group
  • Every Unit is 100% Load Tested to Ensure Quality, We DO NOT use Statistical Sampling
  • All Inventory is Stored Indoors Until it Ships
  • Made in the USA



All gensets are 1800 rpm and equipped with mainline circuit breaker, block heater, battery charger, oil drain and coolant drain extensions, standard muffler and stainless steel flex, UL / CSA digital genset controller with remote start standard.

Isuzu 4LE1 2.2 Liter Engine - Dependable 4 cylinder, 1800 RPM, EPA compliant, Tier 4 interim.

Deep Sea 7310 Controller - Digital controller providing immediate performance information and safety shutdowns.

Stamford Generator End - Alternators built to product clean power for industrial applications.

Powder Coat Paint - Incredibly durable and long lasting finish.

Block Heater - In-line Kim Hotstart, 120V, block heater with thermostat.

Battery Charger - Guest 2 Amp charger comes standard.

UL2200 Listed - A safety standard for the design, construction, and performance of stationary generators.

100% Load Tested - Winco load tests every generator before it leaves the factory.

Alternator Specifications

Rating: 125/40° C

Voltage Regulation: +/- 1%

Total Harmonic Distortion: <5%

Type: 4 Pole Rotating Field

Brushless: Yes

Generator Speed: 1800 RPM

Voltage Control: AS480 External Excitation

Rotor: 2/3 Pitch

Windings: 100% Copper

Telephone Interference: <2%

Efficiency Peak: 92.5%

Coupling: Flexible Disc

Single Phase (1.0 Unity): 4 Lead

Three Phase (.8 Power Factor): 12 Lead

Bearings: 1 Maintenance Free

Insulation: Class H

Generator Warranty: 2 Year/1000 Hours

Engine Specifications

Brand: Isuzu

Model: 4LE1

Speed: 1800 RPM

EPA: Tier IV Interim

Bore & Stroke: 3.35 x 3.78 Inches

Governor: Mechanical

Cylinders: 4

Total Displacement: 2.2L

Aspiration: Natural

Exhaust Outlet Size@ Muffler: 2 Inches

Alternator: 35 Amps

Oil & Filter Replacement: 250 Hours

Recommended Oil - 10W 30

Oil Capacity: 3 Quarts

Flywheel (Teeth 108): 7.5 Inches

Discharge Current (EN 50342): 650 Amps

dB(A) W/Housing: 69 @ 7 meters

Cold Starting W/O Preheating: 14° F (-10° C)

Cold Starting W/Preheating: -13° F (-25° C)

DC System Voltage: 12V

Battery Rack/Cables: Included

Required Battery (not included): BCI Group 24 650 CCA

Engine Warranty: 3 Years / 3000 Hours

Fuel Specifications

Fuel Consumption

Full Load: 1.80 Gal/Hour

Half Load:.90 Gal/Hour

Power Specifications


  • Output - 120/240V 1-PH
  • Watts - 20,000
  • KVA - 20
  • Amps - 83
  • Circuit Breaker - 90 Amps


  • Output - 120/208V 3-PH
  • Watts - 20,000
  • KVA - 25
  • Amps - 69
  • Circuit Breaker - 70 Amps


  • Output - 120/240V 3-PH
  • Watts - 20,000
  • KVA - 25
  • Amps - 60
  • Circuit Breaker - 60 Amps


  • Output - 277/480V 3-PH
  • Watts - 20,000
  • KVA - 25
  • Amps - 30
  • Circuit Breaker - 30 Amps

Dimensions (LxWxH Inches) (Pounds)

Shipping Dimensions (Open): 63 x 34 x 34

Shipping Weight (Open): 1150

Shipping Dimensions (Housed): 75 x 34 x 45

Shipping Weight (Housed): 1635


DSE Control Features

Engine Display/Protection

Engine RPM: Yes

Low Oil Pressure: Yes

High Coolant Temperature: Yes

Low Coolant Level: Optional

Over Speed: Yes

Under Speed: Yes

Over Crank: Yes

GenSet Display/Protection

Voltage (L-N): Yes

Voltage (L-L): Yes

Over/Under Voltage: Yes

Frequency: Yes

Over/Under Frequency: Yes

Phase Imbalance: Disabled

KW, KVA, KVARH, Display: Yes

KWH, KVAH, KVARH Display: Yes

Generator Phase Sequence: Optional

Earth Current: Optional

Additional Displays/Protections

Emergency Stop: Yes

Fuel Leak/Sender Failure: Yes

Battery Over/Under Voltage: Yes

Battery Charger Failure: Optional


USB Connectable: Yes

RS232/RS485: Yes

NFPA Annunciator: 10xDSE 2548

Remote Display Panel: 3xDSE 2510

DSE850 WebNet: Optional

Additional Features

Audible Alarm: Yes

Engine Exerciser: Yes

Maintenance Interval Timer: Optional

Load Shedding: Optional

Load Shedding/Dummy: Optional

Configurable Inputs: 9-24 W/DSE 2130 Optional

Configurable Outputs: 6-80 W/DSE 2751 Optional

Event Log: Yes

Alternative Configurations: 3

UL/CSA Listed: Yes

Optional Accessories

Asco 300 Series Auto Transfer Switch - 104 Amp (For 1-PH or 3-PH Models) - Safely restore power to critical circuits.

Note: More transfer switches can be found by searching "Transfer Switches"

NFPA 110 Level 1 - Factory installed.  Includes remote annunciator, DSE 10 Amp battery charger, and low coolant alarm.

Excitation Boost System - Factory installed.  Provides excitation power for heavy loads or short circuits.

Permanent Magnet Generator 1% Regulation - Factory installed.  Device that converts mechanical energy to electrical energy. In this device the rotor windings have been replaced with permanent magnets.

Permanent Magnet Generator 5% Regulation - Factory installed.  Device that converts mechanical energy to electrical energy. In this device the rotor windings have been replaced with permanent magnets.

Battery Charger Upgrade - Factory installed.  Upgrade from the standard 2 Amp charge to a 5 Amp or 10 Amp with fail contact or 10 Amp NFPA compliant.

Generator Strip Heater - Factory installed.  Reduces condensation.

Battery - Group 24 650 CCA. 20 Lbs.

Fuel Tank - Base mounted steel tanks include double wall secondary containment construction.  10 gauge main tank and 7 gauge outer, UL 142 listing, electrical stub up, removable end channel, four point lifting, normal/emergency vents, supply/return, level gauge, alarms for low fuel and leak detection.  *54 gallon composite fuel tank is not UL 142 listed.  All tanks, except the 54 gallon, are double walled.

Trailer - DOT approved trailers with steel fenders. An integrated single wall fuel tank and standard electric brakes make this trailer one of the most popular models in the business.  Receptacle package ((2) 50 amp CS6365C plug and (2) NEMA 5-20 duplex) standard with trailer. Standard black paint.

DSE2548 Remote Annunciator -This is a remote annunciator that has 16 configured LED's and works up to 1 KM (0.6 miles) away from the host controller.  Up to five of these modules can be hooked-up to one host controller.  5 Lbs.

DSE2510 Remote Display Panel -The Remote Display Panel is a display module designed to work with the DSE7310 Auto Start Failure control modules. Up to three display modules can be connected to one host control module, and can be positioned up to a maximum distance of 1km away.

The remote displays offer exactly the same instrumentation, control and monitoring capabilities as the host control module, including starting and stopping of the engine.  All remote displays connected to the same system, will show the same information at any one time, while the host controller is able to display different information.  The modules are simple to operate and feature the same user-friendly menu layout as the host module.  All communications and configuration are done via the host module only.  The remote devices simply mirror the configuration of the host module, making the system quick and easy to install. 10 Lbs.

DSE890 WebNet Gateway - Remote Communications & Overview Displays allow you to control/monitor your generator from your smartphone, tablet or computer. 1 Lb.

DSE2157 Expandable Outputs - Factory installed.  Output relay expansion module designed to give greater output flexibility when trying to meet complex industry generator control specifications.  The module includes eight configurable relay contacts with LED indicators.  These can be configured as 4 normally open and 4 normally closed.  All configurations are controlled within the host control module.

DSE2130 Expandable Inputs - Factory installed.  Input expansion module designed to give greater flexibility when trying to meet complex industry generator control specifications.  The module includes eight digital inputs.  Four of these can be configured for use as analogue inputs.  All configurations are controlled within the host control module.

Additional information

Weight 1635 lbs
Dimensions 75 × 34 × 45 in