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2026
  1. Home
  2. Generators
  3. Cummins
  4. C66D5EQ

66 kVA Cummins Q Range Silent Diesel Generator

Cummins C66D5EQ | 66 kVA Silent Diesel Generator
* Image(s) are for illustration purposes only, actual configuration may differ slightly.

Cummins C66D5EQ

66 kVA Silent Diesel Generator

Standby66 kVA
53 kW
Prime60 kVA
48 kW
EngineCummins 4BTAA3.3-G14

AlternatorStamford UCI224F

Control PanelCummins PowerStart 0600

Frequency50Hz

Phase3

Voltage400V

Fuel Tank200 Litres
View Full Data Sheet

£10,000 Ex Works + VAT

SpecsSpecifications
Documents
Delivery
ContactContact Us

Cummins C66D5EQ Diesel Generator | 66kVA Standby Generator Set

The Cummins C66D5EQ is a dependable 66kVA standby generator designed to provide reliable backup and prime power for commercial, industrial and infrastructure applications. Delivering 53kW standby power and 48kW prime power, this robust diesel generator combines proven Cummins engine technology, advanced controls and efficient operation to ensure continuity of power wherever reliability matters most.

Reliable 66kVA Standby Power for Critical Applications

Power interruptions can be costly, disruptive and potentially damaging to business operations. The Cummins C66D5EQ has been engineered to deliver dependable emergency power when utility supplies fail, making it an ideal standby diesel generator for facilities that require uninterrupted electrical supply.

Rated at 66kVA standby power and 53kW, this generator set is well suited to a wide range of applications, including:

  • Commercial buildings and offices
  • Agricultural facilities
  • Manufacturing and industrial sites
  • Telecommunications infrastructure
  • Healthcare and care facilities
  • Water treatment operations
  • Retail premises
  • Construction projects
  • Educational establishments

Its fast response to changing loads helps maintain stable performance during power outages, supporting sensitive equipment and essential operations when they are needed most.

60kVA Prime Power Generator for Continuous Operation

In addition to standby duty, the C66D5EQ also serves as a capable 60kVA prime power generator, providing 48kW of continuous power for applications where grid electricity is unavailable or unreliable.

This makes the generator an excellent choice for remote locations, temporary installations and long-term off-grid projects. The prime-rated capability allows businesses to operate with confidence in demanding environments while maintaining consistent power output throughout extended operating periods.

For organisations searching for a 60kVA diesel generator that balances performance, efficiency and durability, the C66D5EQ offers a proven solution backed by one of the most respected names in power generation.

Powered by a Proven Cummins Industrial Diesel Engine

At the heart of the generator set is a rugged Cummins industrial diesel engine engineered specifically for power generation applications. Designed for dependable operation under varying load conditions, the engine delivers strong performance while maintaining fuel efficiency and operational reliability.

Its turbocharged and after-cooled design enhances combustion efficiency and helps ensure responsive performance during sudden load acceptance. Direct fuel injection technology contributes to dependable starting characteristics and efficient operation across a wide range of operating conditions.

The engine has been developed to meet the demands of continuous industrial use, making it suitable for both emergency backup and prime power duties.

Stamford Alternator for Stable Electrical Output

The C66D5EQ features a Stamford brushless alternator, a globally recognised name in generator alternator technology. This high-quality alternator provides excellent voltage stability and dependable electrical performance, helping protect connected equipment from fluctuations and disturbances.

The brushless design reduces maintenance requirements while enhancing long-term reliability. For applications with particularly demanding load profiles, a Permanent Magnet Generator option is also available, providing enhanced motor starting performance and improved short-circuit capability.

The combination of Cummins engine technology and Stamford alternator engineering creates a highly dependable power generation package suitable for a broad range of operational environments.

Advanced Generator Control and Monitoring

Modern businesses require more than simply backup power. They need visibility, control and confidence in system performance.

The Cummins C66D5EQ incorporates the PowerStart 600 control system, providing intelligent generator monitoring and management capabilities. The user-friendly interface allows operators to access critical operational information while simplifying routine generator management.

Key control benefits include:

  • Automatic mains failure functionality
  • Remote start and stop capability
  • Generator protection functions
  • Utility monitoring features
  • Event and fault logging
  • Maintenance reminders
  • Battery monitoring
  • Modbus communication compatibility
  • Real-time performance monitoring

These capabilities allow facility managers and operators to maintain oversight of generator performance while reducing downtime risks and improving operational efficiency.

Designed for Dependable Operation in Challenging Environments

The C66D5EQ has been engineered for reliable performance in demanding operating conditions. Its integrated cooling system is designed to support operation in high ambient temperatures, making the generator suitable for both UK and international installations.

The enclosed version incorporates an acoustic canopy that provides weather protection while helping to reduce operational noise levels. This makes it particularly suitable for applications where noise control is an important consideration, including urban environments, commercial premises and public facilities.

The generator is available in both open and enclosed configurations, allowing customers to select the most appropriate solution for their installation requirements.

Fuel Efficiency and Extended Running Capability

Operating costs remain a key consideration when investing in a commercial diesel generator. The C66D5EQ has been designed to provide efficient fuel consumption across varying load conditions, helping organisations manage long-term operating expenses.

Its integrated fuel system and substantial onboard fuel capacity support extended operating periods between refuelling intervals. For sites requiring longer autonomous operation, extended fuel tank options are available to increase runtime further.

This makes the generator particularly attractive for critical standby applications where extended outages may occur, as well as remote locations where fuel deliveries may be less frequent.

Ideal for Commercial and Industrial Backup Power

Businesses looking for a commercial generator that combines reliability with operational flexibility will find the C66D5EQ well suited to a wide range of sectors.

Its versatile design supports both standby and continuous power requirements, making it suitable for organisations that need a generator capable of adapting to changing operational demands.

Typical uses include:

  • Backup power for commercial premises
  • Industrial standby power systems
  • Agricultural power generation
  • Infrastructure resilience projects
  • Utility support applications
  • Remote site power generation
  • Data and communications facilities
  • Construction site power

Whether installed as part of a permanent backup power system or deployed for prime power generation, the C66D5EQ delivers dependable performance backed by Cummins engineering expertise.

Built to International Standards

Quality, compliance and reliability are central to the design of the Cummins C66D5EQ. The generator has been developed in accordance with recognised international standards for generator performance, safety and environmental compliance.

Available with CE and UKCA certification, the generator is suitable for deployment across the UK, Europe and international markets. Manufacturing takes place within facilities certified to internationally recognised quality and environmental management standards, providing additional assurance for customers investing in critical power infrastructure.

Why Choose the Cummins C66D5EQ?

Selecting the right generator involves balancing performance, reliability, operating costs and long-term support. The Cummins C66D5EQ delivers on all fronts, combining proven engine technology, advanced controls and robust construction in a compact, efficient package.

Key advantages include:

  • 66kVA standby generator capability
  • 53kW emergency backup power output
  • 60kVA prime power rating
  • 48kW continuous power generation
  • Proven Cummins diesel engine
  • Stamford brushless alternator
  • Advanced PowerStart control system
  • Open and enclosed generator options
  • Excellent fuel efficiency
  • Worldwide service and support network
  • Suitable for commercial and industrial applications

For organisations seeking a reliable diesel generator that can provide dependable power during outages while also supporting continuous operation when required, the Cummins C66D5EQ represents a trusted and highly capable power generation solution.

Generators Similar to the Cummins C66D5EQ

Cummins C44D5e

Cummins C44D5e

Cummins C44D5e

Standby44 kVA

Prime40 kVA
EngineCummins
TypeSilent
Voltage400V
Made InIndia

£10,110Ex Works + VAT

Cummins C55D5EQ

Cummins C55D5EQ

Cummins C55D5EQ

Standby55 kVA

Prime50 kVA
EngineCummins
Type

Power Output

Standby (ESP) Rating66 kVA
53 kW

Prime (PRP) Rating60 kVA
48 kW

Frequency50Hz

Phase3

Voltage400V

Amps Per Phase95

Generator Set

ConfigurationSilent Canopied

AlternatorStamford UCI224F

Control PanelCummins PowerStart 0600

Dimensions
Length2320mmWidth1015mmHeight1685mm

Weight
Dry1282kgWet1310kg

Canopy Noise Level77 dB(A) at 1m / 67 dB(A) at 7m

Output ConnectionCircuit Breaker (4 Pole)

Engine

EngineCummins 4BTAA3.3-G14

RPM1500

Engine GovernorMechanical

Emissions StandardStage IIIA

Radiator Ambient Temp.50°C

Fuel

Fuel TypeDiesel

Fuel Tank Capacity200 Litres

Consumption14 Litres/hour*

Autonomy14.3 hours*

* at 100% prime rated load

Warranty

Standby Applications2 years or 500 hours

Prime Applications1 year unlimited hours
Cummins Generator Warranty Statement
Silent
Voltage400V
Made InEurope

£9,800Ex Works + VAT

Cummins C55D5e

Cummins C55D5e

Cummins C55D5e

Standby55 kVA

Prime50 kVA
EngineCummins
TypeSilent
Voltage400V
Made InIndia

£10,120Ex Works + VAT

Cummins C66D5e

Cummins C66D5e

Cummins C66D5e

Standby66 kVA

Prime60 kVA
EngineCummins
TypeSilent
Voltage400V
Made InIndia

£11,170Ex Works + VAT