Producing reliable power from 114 ekW to 158 ekW at 60Hz, our C6.6 ACERT™ diesel generator sets are engineered for your standby and prime applications. All are tested to maximum load before they leave any one of our ISO 9001 certified facilities. And we've incorporated our common rail fuel system for a fuel-efficient generator set, meeting EPA Stationary Emergency (Tier 3) emissions limits. Seismic certification is also available so disturbances never disrupt your power. Our integrated control system, including Cat® UPS, ATS and switchgear, ensures a consistent power supply and connection to your fleet through on-site and remote monitoring options. The EMCP 4.2 control panel, with a user-friendly interface, puts our advanced management and diagnostic tools in one. We believe you should have a say in how you supply power — choose from a broad range of accessories and bolt-on system expansion attachments. Find flexible packaging options to work with your spatial requirements and climate. Customize your C6.6 generator sets to meet your critical power needs.

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Generator Set Specifications
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Minimum Rating 114 ekW 114 ekW
Maximum Rating 175 ekW 175 ekW
Emissions/Fuel Strategy Tier 3 Nonroad Equiv. Tier 3 Nonroad Equiv.
Voltage 208-600 Volts 208-600 Volts
Frequency 60 Hz 60 Hz
Speed 1800 RPM 1800 RPM

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


  • Matched to the performance and output characteristics of Cat engines
  • Industry leading mechanical and electrical design
  • Industry leading motor starting capabilities
  • High Efficiency

EMCP Control Panel

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP4 systems can be further customized to meet your needs through programming and expansion modules.

Seismic Certification

  • Seismic Certification available.
  • Anchoring details are site specific, and are dependent on many factors such as generator set size, weight, and concrete strength.
  • IBC Certification requires that the anchoring system used is reviewed and approved by a Professional Engineer
  • Seismic Certification per Applicable Building Codes: IBC 2000, IBC 2003, IBC 2006, IBC 2009, CBC 2007, CBC 2010
  • Pre-approved by OSHPD and carries an OSP-0321-10 for use in healthcare projects in California

Design Criteria

The generator set accepts 100% rated load in one step per NFPA 110 and meets ISO 8528-5 transient response.

UL 2200 / CSA - Optional

  • UL 2200 listed packages
  • CSA Certified
  • Certain restrictions may apply.
  • Consult with your Cat® Dealer.

Single-Source Supplier

Fully prototype tested with certified torsional vibration analysis available

World Wide Product Support

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

C6.6 (60 Hz) Standard Equipment

Air Inlet
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  • Air Cleaner

C6.6 (60 Hz) Optional Equipment

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  • Industrial, Residential, Critical Mufflers