C18 Generator Set

Air to Air Aftercooled
Fuel System
Electronic unit injection
Fuel System
Electronic unit injection
  • Exterior View
  • Exterior View

Engine Specifications

Air to Air Aftercooled
Fuel System
Electronic unit injection
Fuel System
Electronic unit injection
Engine Model
C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel
145 mm (5.71 in)
18.13 L (1106.36 in3)
183 mm (7.2 in)
Compression Ratio
Governor Type
Air to Air Aftercooled
Fuel System
Electronic unit injection
6 in
1,106 in³
7 in

Generator Set Specifications

Minimum Rating
500 ekW
Maximum Rating
600 ekW
220 to 380 Volts
60 Hz
1800 rpm
Emissions/Fuel Strategy
Low Fuel Consumption
Duty Cycle
Standby, Prime

Generator Set Dimensions

Length - Maximum
219 in
Width - Maximum
81 in
Height - Maximum
108 in

Cat Generator Set Package

  • Cat generator set packages have been fully prototype tested
  • Accepts 100% block load in one step and meets NFPA 110 loading requirements
  • Conform to ISO 8528-5 steady state and transient response requirements

Cat Diesel Engine

  • Reliable, rugged, durable design
  • Field-proven in thousands of applications worldwide
  • Four-stroke-cycle diesel engine combines consistent performance and excellent fuel economy with minimum weight

A-Frame Alternator

  • Superior motor starting capability minimizes need for oversizing alternator
  • Designed to match performance and output characteristics of Cat diesel engines
  • Robust Class H insulation

EMCP Control Panel

  • User-friendly interface and navigation
  • Scalable system to meet a wide range of installation requirement
  • Expansion modules and site-specific programming for specific customer requirements

Cooling System

  • Designed to operate in standard ambient temperatures up to 55°C (131°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

One Safe Source

  • Components used in the generator set are selected based on seamless design integration to provide the optimum performance
  • The generator set is fully assembled at a Caterpillar facility following our quality guidelines
  • Each generator set package is tested before leaving the Caterpillar facility
  • Cat product support, including dealer service, parts and warranty covers the entire Cat power system

World Wide Product Support

  • Cat dealers have over 1,800 dealer branch stores operating in 200 countries
  • Your local Cat dealer provides extensive post-sale support, including maintenance and repair agreements
  • Air Inlet
    • Air Cleaner
  • Cooling
    • Package mounted radiator
  • Exhaust
    • Exhaust flange outlet
  • Fuel
    • Fuel priming pump
    • Secondary fuel filter
    • Primary fuel filter with integral water separator
  • Generator
    • IP23 Protection
    • Matched to the performance and output characteristics of Cat engines
    • Load adjustment module provides engine relief upon load impact and improves load acceptance and recovery time
  • Power Termination
    • Bus Bar
  • Control Panel
    • EMCP 4.2
  • Mounting
    • Rubber vibration isolators
  • Starting/charging
    • 24 volt starting motor
    • Batteries
  • General
    • Paint - Caterpillar Yellow except rails and radiators gloss black
  • Exhaust
    • Industrial, Residential, Critical Mufflers
  • Generator
    • Anti-condensation heater
    • Oversize and premium generators
    • Excitation: [ ] Permanent Magnet Excited (PM) [ ] Internally Excited (IE)
  • Power Termination
    • Circuit breakers, UL listed
    • Circuit breakers, IEC compliant
  • Control Panels
    • Remote monitoring software
    • Local & remote annunciator modules
    • Digital I/O module
    • EMCP 4.4
    • Load share module
  • Starting/charging
    • Oversize batteries
    • Battery chargers
    • Heavy-duty starting system
    • Jacket water heater
    • Charging alternator
  • General
    • Narrow, Wide or Skid Base
    • CSA Certification
    • UL 2200 package
    • EU Certificate of Conformance (CE)
    • Enclosures: sound attenuated, weather protective
    • Single or dual wall integral fuel tanks
    • Integral & sub-base UL listed dual wall fuel tanks
    • Automatic transfer switches (ATS)
    • Sound attenuated, weather protective or high ambient weather protective enclosure
    • The following options are based on regional and product configuration:
    • Single or dual wall sub-base fuel tanks
    • EEC Declaration of Conformity
    • Seismic Certification per applicable building codes: IBC 2000, IBC 2003, IBC 2006, IBC 2009, CBC 2007