17.302,34 €
Cummins 40 kW Generator Quiet Connect Natural Gas or Propane—120/208 Volt RS40 Whole Home or Commercial Standby Generator 68dB Noise
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase is a professional-grade standby power solution engineered for commercial buildings, industrial operations, and large residential properties that require dependable three-phase electricity. Built with Cummins’ legendary reliability, this generator combines a powerful 2.4-liter turbocharged engine, advanced PowerCommand digital controls, and a sound-attenuated aluminum enclosure to deliver stable backup power even in extreme weather conditions.
When power outages threaten business continuity or critical systems, the Cummins RS40 generator ensures operations continue without disruption. Designed for automatic standby functionality, it activates within seconds of a power loss and maintains precise voltage and frequency regulation for sensitive equipment.
This Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase also features industry-leading diagnostics, fuel flexibility between natural gas and propane, and robust engineering that meets demanding standards such as UL-2200 and NFPA 110 compliance when properly equipped.
For facilities that require reliable three-phase power generation with minimal noise and long-term durability, the Cummins Quiet Connect RS40 is one of the most trusted standby generators available today.
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase is designed to deliver consistent power for commercial environments such as:
Office buildings
Healthcare facilities
Manufacturing plants
Data centers
Retail complexes
Agricultural operations
Large residential estates
Unlike air-cooled generators, the liquid-cooled system maintains optimal engine temperature under heavy loads, improving reliability and extending engine life.
Key highlights include:
40kW standby power output
120/208V three-phase electrical configuration
Ultra-quiet aluminum Sound Level 1 enclosure
Natural gas or propane operation
PowerCommand 1.1 intelligent control system
Automatic standby activation
These capabilities make it ideal for installations where stable and continuous electricity is essential.
At the heart of the system is a 2.4-liter turbocharged aftercooled inline 4-cylinder Cummins engine running at 1800 RPM.
This industrial engine is designed for:
High efficiency
Long operating life
Stable load handling
Reduced vibration
Compared with high-RPM generators, the lower engine speed improves durability and reduces mechanical wear.
The RS40 includes the PowerCommand 1.1 control platform, one of the most advanced standby generator controllers available.
Key control capabilities:
Automatic start during outages
Remote start/stop capability
Self-diagnostic monitoring
Backlit LED display interface
Automatic fault shutdown protection
Real-time system status monitoring
This intelligent control system helps facility managers maintain full visibility of generator performance.
Noise reduction is a major concern for standby generator installations. The Quiet Connect series uses a Power Coat aluminum enclosure engineered to significantly reduce operational noise.
Benefits include:
Only 68 dBA operating noise
Corrosion-resistant aluminum housing
Wind resistance up to 180 MPH
Removable access doors for service
The enclosure also enhances weather protection and ensures long-term durability outdoors.
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase is equipped with factory-installed cold weather components to ensure dependable startup even in extreme climates.
Cold-weather equipment includes:
Coolant heater
Crankcase vent heater
Large battery rack
Flexible fuel line
With these components installed, the generator can start in temperatures as low as -40°F.
Routine testing is essential to ensure generators operate properly during emergencies. Cummins includes a flexible exercise schedule that allows testing intervals tailored to user needs.
Exercise options include:
Automatic system testing
Custom maintenance intervals
Minimum runtime as low as 2 minutes every 6 months
This feature helps reduce unnecessary fuel consumption while maintaining system readiness.
Model Number: RS40 / A051Y420
Manufacturer: Cummins Power Generation
Country of Manufacture: USA
Rated Power: 40kW
Voltage: 120/208 Volts
Phase: 3-Phase
Rated Amps: 138.8 Amps
Frequency: 60 Hz
Engine Type: Inline 4-Cylinder Cummins
Engine Size: 2.4 Liter Turbocharged Aftercooled
Engine Speed: 1800 RPM
Cooling System: Liquid Cooled
Cast Iron Block with Sleeve
Type: Brushless 4-Pole Revolving Field
Voltage Regulation: ±1.0%
High efficiency power output
Fuel Type: Natural Gas or Propane
Field selectable during installation
Fuel consumption:
Natural Gas
Full Load: 519 cu ft/hour
Half Load: 304.7 cu ft/hour
Propane
Full Load: 5.4 gallons/hour
Half Load: 3.4 gallons/hour
Enclosure: Sound Level 1 Aluminum
Noise Level: 68 dBA
UL Listed: UL-2200
Seismic Compliance: IBC Seismic Rated
Length: 94 inches
Width: 34 inches
Height: 45.5 inches
Weight: 1356 lbs
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase is widely used across industries that require stable three-phase backup power.
Typical applications include:
Many commercial facilities operate HVAC systems, elevators, lighting systems, and security equipment that require three-phase electricity.
The RS40 generator provides reliable standby power during outages.
Servers and networking infrastructure demand:
Consistent voltage
Stable frequency
Continuous power availability
Cummins generators are widely trusted for protecting sensitive electronics.
Medical clinics and small hospitals rely on standby generators to power:
Diagnostic equipment
Lighting systems
Refrigeration for medical supplies
The RS40 supports NFPA 110 emergency power requirements when properly configured.
Industrial machinery often requires 3-phase electricity. The RS40 generator ensures operations can continue during power disruptions.
Before installing the Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase, several factors should be evaluated.
The generator must be installed on a prepared mounting pad to ensure stability and proper ventilation.
Recommended installation surfaces include:
Reinforced concrete pads
Prefabricated generator bases
Engineered steel mounting platforms
To enable automatic power switching during outages, a compatible automatic transfer switch (ATS) is required.
Recommended options include:
Cummins RA Series
Cummins RSS Series
Cummins OTEC ATS
These systems detect utility power loss and start the generator automatically.
Because this generator supports three-phase electrical systems, installation should be performed by licensed technicians familiar with commercial electrical systems.
When evaluating the Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase, it helps to compare similar generator options available.
For example, facilities requiring higher voltage 3-phase power may consider the
Cummins 40kW Generator Quiet Connect Liquid Cooled 120/240 Volt 3 Phase.
For single-phase installations, the
Cummins Quiet Connect 40kW Generator RS40 120/240V Single Phase
offers similar reliability for residential or small commercial applications.
Facilities requiring greater capacity may also explore the
Cummins Power Quiet Connect 60kW Liquid Cooled Standby Generator
for larger power demands.
These comparisons help buyers select the correct generator configuration based on voltage requirements and facility size.
Regular maintenance ensures the Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase performs reliably for years.
Recommended maintenance practices include:
Check oil levels
Inspect fuel lines
Verify battery condition
Review system alerts
Running the generator under load periodically ensures:
Proper engine performance
Stable voltage output
Fuel system reliability
Because the generator is liquid cooled:
Check coolant levels regularly
Inspect hoses and connections
Replace coolant according to manufacturer schedule
Annual inspections by certified technicians help identify potential issues before failures occur.
Many standby generators under 20kW use air-cooled engines, which are less expensive but operate at higher RPM speeds.
Liquid-cooled generators like the RS40 offer significant advantages:
Lower engine temperatures
Reduced mechanical wear
Greater power output capability
Longer service intervals
This makes the Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase a better long-term investment for facilities requiring reliable backup power.
Cummins backs the RS40 generator with a 2-year limited warranty covering both residential and commercial installations.
Extended warranty programs up to 10 years are available, providing long-term protection and peace of mind.
Cummins also maintains one of the largest global service networks for power generation equipment.
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/208 Volts 3 Phase is a powerful and dependable standby generator engineered for demanding commercial and industrial environments. With a durable liquid-cooled engine, advanced PowerCommand controls, ultra-quiet enclosure, and flexible natural gas or propane operation, it provides reliable backup power when it matters most.
Designed to withstand harsh weather conditions and operate efficiently for years, the RS40 generator offers the performance, durability, and reliability expected from Cummins power systems. For businesses, facilities, and large properties that depend on uninterrupted electricity, this generator delivers dependable standby power you can trust.
The generator produces 40 kilowatts of standby power at 120/208 volts three-phase, delivering up to 138.8 amps.
Yes. The generator uses a liquid-cooled cooling system, which improves reliability and engine lifespan compared with air-cooled generators.
Yes. The Cummins RS40 generator supports natural gas or liquid propane, and the fuel type can be selected during installation.
The generator operates at approximately 68 dBA, thanks to the Sound Level 1 aluminum enclosure designed to reduce noise.
Yes. When connected to a compatible automatic transfer switch, the generator starts automatically during a utility power failure.
With factory-installed heaters, the generator can start in temperatures as low as -40°F.
Yes. The generator meets UL-2200 certification, EPA emissions standards, and can meet NFPA 110 emergency power requirements when properly equipped.
Most standby generators should be serviced annually or every 200 operating hours, depending on usage and manufacturer recommendations.
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