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From natural gas-fueled combined heat and power (CHP) systems and emergency power for facilities, to renewable biogas energy to support the local grid, or electricity generated from coal mine gases, Caterpillar has a wide range of reliable gas power solutions.

Generator Set Specifications

  • Maximum Continuous Rating 485 ekW 485 ekW
  • Fuel Type Natural Gas, Biogas Natural Gas, Biogas
  • Maximum Electrical Efficiency 37.30% 37.30%
  • Maximum Standby Rating 485 485
  • Frequency 50/60Hz 50/60Hz
  • RPM 1200/1500rpm 1200/1500rpm

Engine Specifications

  • Displacement 2105.0 in³ 33.0 l
  • Stroke 7.5 in 190.0 mm
  • Engine Model 3508A 3508A
  • Bore 6.7 in 170.0 mm
  • Aspiration TA TA

Generator Set Dimensions

  • Length 150.0 in 3821.0 mm
  • Width 62.0 in 1570.0 mm
  • Height 79.0 in 2012.0 mm
  • Dry Weight - Genset 16301.0 lb 7393.0 kg

World Wide Product Support

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Over 1400 G3508 gensets installed

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G3508A Standard Equipment

Air Inlet

  • Package Mounted Air Cleaner with service indicator

Control Panels

  • EMCP 4.3


  • Single stage aftercooler with mechanical pump, thermostats
  • Combined jacket water and oil cooler circuit with mechanical pump and thermostats


  • Water cooled exhaust
  • Individual exhaust port thermocouples

Fuel system

  • High pressure fuel system
  • Natural gas rated(31.5 to 47.2 MJ/NM3)
  • High pressure gas pressure regulator


  • SR4B
  • Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
  • Busbar connections
  • Anti-condensation space heater
  • Permanent magnet excitation
  • Form Would Stator with Coastal Insulation Protection
  • Platium stator winding temperature detectors


  • 24V starting motors
  • Battery disconnect switch


  • Paint - Caterpillar Yellow except rails and radiators gloss black
  • Crankshaft vibration damper and guard
  • Operation and maintenance manuals
  • Parts book

G3508A Optional Equipment

Air Inlet

  • Air inlet adapters

Control Panels

  • Local alarm module
  • Remote annuciator
  • Remote Communications Module (PL1000T, PL1000E)
  • Control panel removal


  • Raw water aftercooler
  • Cleanable aftercooler core


  • Flange
  • Exhaust expander
  • Elbow
  • Flexible fitting

Fuel System

  • Fuel filter
  • Propane and associated gas fuel ratings
  • Gas shutoff valve


  • Low voltage extension box
  • Cable access box
  • Bearing temperature detectors
  • European bus bar
  • Generator air filter
  • Space heater shutoff relay


  • Battery charger
  • Oversized battery
  • Jacket water heater
  • Battery with cable and rack (shipped loose)
  • Dual starter


  • Crankcase explosion relief valve
  • Engine barring group
  • EEC D.O.I and other certifications

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