DG125 (Single-phase and 3 phase)

DG125 (Single-phase and 3 phase) (60 Hz)

The Cat® spark-ignited generator sets for stationary emergency and non-emergency (demand response) applications provide a much cleaner and sustainable solution for your power needs. The ability to run on various types of gaseous fuels, adapting automatic fuel change-over and microgrid compatibility, make these products capable to power a wide range of applications.


Robust Spark Ignited Engine

  • Reliable, rugged, durable design
  • 6.2L TCAC spark ignited dual fuel engine compatible with natural gas and propane delivers consistent performance and excellent fuel economy with lower emissions.

Self-Regulated Alternator

  • Superior motor starting capability minimizes need for oversizing alternator
  • Designed to match performance and output characteristics of Cat engines
  • Robust Class H insulation
  • High-efficiency alternators with flexible packaging and easy installation
  • Ease of serviceability and longer life

Cooling System

  • Designed to operate in standard ambient temperatures up to 50°C (122°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities

GCCP1.2 Control Panel

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

One Safe Source

  • Components used in the generator set are selected at the design stage to provide optimum package 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


  • UL2200
  • IBC Seismic
  • NFPA110

Worldwide 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

Virtual Tours

Standard Equipment

Control Panel
  • GCCP1.2

Additional information

Offering Type

Generator Set Specifications - Frequency

60 Hz

Generator Set Specifications - Gas Standby Rating

125 ekW

Generator Set Specifications - Emissions/Fuel Strategy

U.S. EPA Certified for Stationary Emergency and Non-Emergency Application

Generator Set Specifications - Voltage


Generator Set Specifications - Speed

1800 rpm

Engine Specifications - Engine Model

V8, 6.2L TCAC

Engine Specifications - Bore

101.6 mm ( 4 in )

Engine Specifications - Stroke

95.3 mm ( 3.75 in )

Engine Specifications - Displacement

6.2 l ( 378.3 in³ )

Engine Specifications - Compression Ratio


Engine Specifications - Aspiration


Engine Specifications - Fuel System


Generator Set Dimensions - Length

2438 mm ( 96 in )

Generator Set Dimensions - Width

1295 mm ( 51 in )

Generator Set Dimensions - Height

1448 mm ( 57 in )

Generator Set Dimensions - Dry Weight - Genset

1464 kg ( 3226 lb )

Generator Set Specifications - Natural Gas Rating

125 ekW

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