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CM20C Generator Set

Caterpillar electric power stands for reliable energy supply. Especially during the energy system transformation, Cat generator sets close the energy gap caused by renewable energy source such as wind and photo voltaic. Short ramp up time, low operating costs and rapid maintenance times ensures a high availability according to the need of our customers. Combined heat /cool and power solutions allow our customers to maximize the efficiency and earnings paired with low emissions. Wherever power is needed around the globe, Caterpillar is able to support you with the best products and services to maximize your profit.

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  • Genset Rating Range 985 - 1650 kWe
  • Engine Rating Range 1020 - 1710 kW
  • Emission Level Up To World bank emission certification (Stage 2)
  • Voltage 3000 to 13800 Volts

Call 440-838-7348 for rate information

Generator Set Specifications

  • Genset Rating Range
    985 - 1650 kWe
  • Emission Level Up To
    World bank emission certification (Stage 2)
  • Voltage
    3000 to 13800 Volts
  • Frequency At Speed
    50 Hz @ 1000 / 60 Hz @ 900
  • Aspiration
  • Bore
    7.87 in
  • Stroke
    11.81 in
  • Emergency Ramp Up 10% To 100% Load
    25 s
  • Genset Efficiency Up To
  • Normal Ramp Up To 100% Load
    75 s
  • Ready To Accept Loads (Preheated/Vented)
    40 s
  • Minimum Rating
    985 kWe
  • Maximum Rating
    1650 kWe
  • Emissions/Fuel Strategy
    (WB) Stage 1 and 2
  • Duty Cycle
    Prime, Continuous

Engine Specifications

  • Engine Rating Range
    1020 - 1710 kW
  • Engine Type
  • Configuration
    6,8,9 cylinder
  • Fuel Type
    Diesel oil / heavy fuel oil (HFO) / crude oil
  • Specific Fuel Oil Consumption (WB I) Up To
    0.417 Ib/kWh
  • Specific Fuel Oil Consumption (WB II) Up To
    0.417 Ib/kWh
  • Specific Lube Oil Consumption
    0.001 Ib/kWh
  • Mean Effective Pressure Up To
    351 psi
  • Swept Volume
    575 in³
  • Engine Model
    CM20C, 4-stroke-engine
  • Bore
    7.87 in
  • Stroke
    11.81 in
  • Aspiration

Generator Set Dimensions

  • Length - Maximum
    281 in
  • Length - Minimum
    239 in
  • Width - Maximum
    71 in
  • Width - Minimum
    66 in
  • Height - Maximum
    119 in
  • Height - Minimum
    112 in
  • Dry Weight - Genset (maximum)
    66139 lb
  • Dry Weight - Genset (minimum)
    41447 lb

Reliable Operation

  • Intensive cooling of key components including exhaust valve seats, injector cooling integrated into lube oil system
  • Reliable, proven and high efficient single turbo charging system
  • Classification society standards ensure high safety and quality
  • Intelligent simplicity ensures a robust engine platform
  • Optimized service schedules enable high availability and long durability

Control & Monitoring

  • Ultrafast start time and load acceptance
  • No engine start limitations
  • Continuous power (base and peak load), prime power, stand-by
  • Part load with high efficiency
  • Monitoring for unattended operation
  • Asset intelligence system

Ease Of Installation

  • Reduced complexity of standard modular design allows an easy installation
  • Low space requirements between the gensets
  • Genset is ready for installation
  • Generator set designed for direct elastic mounting

Ease Of Operation

  • Low fuel and oil consumption
  • Low maintenance requirements
  • Operator and maintenance training courses available

Intelligent Simplicity

  • High reliability, modular design and integral construction reduce the number of components by 40% over conventional designs e.g.:
    - Dry engine block with integrated ducts for lubricating oil and charge air and underslung crankshaft
    - Compact cylinder head design
  • Smart maintenance solutions:
    - Easily removable cylinder heads, quick removable fluid connections
    - Split connecting rods to allow fast and easy piston removal without disturbing the big end bearing
    - Segmental camshaft design
    - Simplified parts spectrum by using single-pipe exhaust gas
    - Engine block free from cooling water
  • State-of-art material ensures long life time

Ease Of Maintenance

  • Smart maintenance solutions allow an easy component accessibility
  • Large inspection openings afford an easy serviceability to core engine internals
  • Core engine components designed for reconditioning and reuse
  • Short maintenance times enable high availability
  • No engine removal necessary for maintenance and overhauls


  • Liquid: Light fuel oil (LFO), crude oil and heavy fuel oil (HFO) with fuel quality up to 700 cSt/50°C according to CIMAC H55/K55
  • Dual:
    - Light fuel oil (LFO), crude oil and heavy fuel oil (HFO) with fuel quality up to 700 cSt/50°C according to CIMAC H55/K55
    - Natural gas with methane number > 80 and lower heating value of 28MJ/Nm3
  • Gaseous: Natural gas with methane number > 80 and lower heating value of 31.5 MJ/Nm3


  • World bank emission certification (Stage 2)
  • Technische Anleitung (TA) Luft (only gas)
  • Post-emission treatment systems for lower emission requirements available

Expertise & Experience

  • Assistance for planning - delivery - commissioning - operation and service)
  • Expertise and experience for solutions to maximize benefits, e.g. combine heat and power systems (CHP)

World Wide Product Support

  • With nearly 200 Cat dealers we are at home around the globe
  • Factory-trained technicians, original parts and support are never out of reach
  • Long term service agreements offer back-to-back services from preventive maintenance, scheduled maintenance to full operation and maintenance of your asset

Standard Equipment:

  • Fuel System
    • Pre-pressure module
    • Circulation module
    • Separator module
    • Gas valve unit (GVU) (only dual fuel (DF) and gas)
    • Engine ventilation module (only dual fuel (DF) and gas)
    • Ignition fuel oil module (only dual fuel (DF))
  • Lubricating Oil System
    • Combined module: cooling water system and lube oil system
    • Piping interface module
    • Lube oil separator module
  • Cooling Water System
    • Piping interface module
    • Cooling water system with radiators
    • Combined module: see lube oil system
  • Starting System
    • Starting air compressor module
    • Starting air receiver module
  • Combustion Air System
    • Air filter - oil bath
    • Air filter - pulse
    • Air filter - pocket
  • Exhaust System
    • Selective catalytic reduction (SCR) system
    • Oxidation catalytic (Oxicat) converter system
    • Exhaust gas ventilation module (only dual fuel (DF) and gas)
    • Exhaust gas silencer
  • Control & Monitoring System
    • Motor control center module (MCC)
    • Local data panel (LDP) / generator control panel (GCP)
    • Local control panel (LCP)
    • Engine monitoring package
    • Gas leak detection per cylinder (only dual fuel (DF) and gas)
  • Mounting System
    • Elastic mounting - genset/engine

Optional Equipment:

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