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Generac RD02023 20kW Protector Series Automatic Standby Diesel Generator

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  • Designed for ease of installation and service, with external viewing windows for easy inspection of generator status and breaker position

  • They also feature removable doors for easy fueling

SKU: RD02023

Availability: In stock


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  • The Evoloution Controller is the next generation of intuitive controllers featuring a multilingual, two-line LCD text display with color-coded, backlit buttons
  • Quiet-Test Mode is a weekly self-test mode that runs at a lower RPM, is quieter, and consumes less fuel
  • Code Ready – offers compatibility with a variety of environments with external vent and fill, a UL/CUL 142-listed, double-walled base tank, a UL/CUL 2200-listed generator, and a wide range of code-driven accessories
  • 5-year limited warranty
  • External viewing window for easy inspection of generator status and breaker position
  • Removable doors for easy service and fuel fill access
  • Isochronous Governor – electronic governor control for tight and precise load response and voltage (+/- 1%) and frequency regulation

Compliance and Restrictions.

Warning: Cancer and Birth Defect/Reproductive Harm -- www.P65Warnings.ca.gov/product



Power Output 20kW
Type Synchronous
Rotor Insulation Class H
Stator Insulation Class H
Telephone Interference Factor (TIF) <50
Alternator Output Leads 1-Phase 3 wire
Alternator Output Leads 3-Phase 6 wire
Bearings Single Sealed Cartridge
Coupling Direct, Flexible Disc
Excitation System Direct
Voltage Regulation
Type Electronic
Sensing Single Phase
Regulation ± 1%
Features Adjustable Voltage and Gain
Governor Specifications
Type Electronic Isochronous
Steady State Regulation ± 0.25%
Electrical System
Battery Charge Alternator 50 Amp
Static Battery Charger 2 Amp
Recommended Battery Group 27F, 700 CCA
System Voltage 12 Volts
Engine Specifications
Model In-line
Cylinders 4
Displacement (Liters) 2.28
Bore (in/mm) 3.46/88
Stroke (in/mm) 3.70/94
Compression Ratio 21.3:1
Intake Air System Naturally Aspirated
Cylinder Head Type Cast Iron OHV
Piston Type Emergency Stationary
EPA Emissions Compliance Steel
Engine Lubrication System
Oil Pump Type Gear
Oil Filter Type Full flow spin-on cartridge
Crankcase Capacity (qt/l) 6.87/6.5
Engine Cooling System
Type Pressurized radiator
Water Pump Pre-lubed, self-seating
Fan Speed (rpm) 1800
Fan Diameter (in/mm) 18.11/460
Fan Mode Pusher
Fuel System
Fuel Type Ultra Low Sulfur Diesel Fuel
Fuel Pump Type Mechanical Engine Driven Gear
Injector Type Mechanical
Fuel Supply Line (mm/in) 7.94/0.31 (ID)
Fuel Return Line (mm/in) 7.94/0.31(ID)
Fuel Specification ASTM
Fuel Filtering (microns) 5
Tank Specifications
Total Size (gallons/liters) 34/128.7
Usable Size (gallons/liters) 32/121.1
Run Time @ 1/2 Load (hrs) 31



15 KW

20 KW

30 KW

48/50 KW

Model Number RD01523 RD02023 RD03024 RD04834
Engine/Alternator RPM 1800/1800 1800/1800 1800/1800 1800/1800
Engine Inline 4 Cylinder Inline 4 Cylinder Inline 4 Cylinder Inline 4 Cylinder
Fuel Type Diesel Diesel Diesel Diesel
Output Amps 120/240 V, 1Ø 62 83 125 200
Output Amps 120/208 V, 3Ø 52 69 104 173
Output Amps 120/240 V, 3Ø 45 60 90 150
Output Amps 277/480 V, 3Ø n/a n/a 45 75
Fuel Consumption @ 1/2 Load - Gal/Hr .79 1.05 1.45 2.3
Fuel Consumption @ Full Load - Gal/Hr 1.48 1.98 2.74 4.3
Quiet-Test Mode Yes Yes Yes Yes
db(A) at exercise 65 65 65 65
db(A) at normal operating load 70 70 70 70
Enclosure Steel Steel Steel Steel
Enclosure Color Gray Gray Gray Gray
Warranty 5-Year Limited 5-Year Limited 5-Year Limited 5-Year Limited
L x W x H 80.8 x 30.55 x 49.4 80.8 x 30.55 x 49.4 95.4 x 35 x 55.4 95.4 x 35 x 55.4
Weight 1474 1574 1755 2114
Meets EPA Emissions Regulations Yes Yes Yes Yes

More Info



  • Two Line LCD Multilingual Digital Evolution™ Controller (English/Spanish/ French/Portuguese) with external viewing window for easy indication of generator status and breaker position.
  • Isochronous Electronic Governor
  • Sound Attenuated Enclosure
  • Smart Battery Charger
  • UV/Ozone Resistant Hoses
  • Integrated base tank for up to 40 hours of run time
  • ±1% Voltage Regulation
  • 5 Year Limited Warranty
  • UL 2200 / UL142 / ULC S601 Listed


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