Equipped with 2400 cc engine, the Cummins Quiet Connect RS Cummins A051Y420 RS40 40kw Power Quiet Connect™ Series Liquid Cooled 3 Phase Home Standby Generator LP/NG NewSeries 22-40kW Standby Generator is a reliable source of power for
medium to large homes. It runs at 22,000 to 40,000 watts both on natural or propane gas with a voltage of 120/208 single phase to 277/480 three phase. The engine has a 12V automatic starting system and runs a 5-ton A/C under full preload. It features a liquid-cooled cooling system with extremely quiet operation up to 60 to 64-decibel rating at 23 feet with a Sandstone Sound Level 1 enclosure and muffler. It has 1,800 RPM designed to provide reliability and fuel efficiency.
Features
- Reliable Cummins Engine - QSJ2.4 engine for reliable power
- Robust Product Design and Testing
- Flexible Exercise mode duration that suits the customer's preference - as little as 2 minutes every 6 months
- Advanced Enclosure Design capable of withstanding winds up to 150 MPH
- Self diagnostics and easy service
- Control Systems - PowerCommand 1.1 control with 128 x 64 backlit LED display for improved user experience
- Brushless Proven Alternator
- Sound Attenuated - aluminum enclosure material plus durable powder coat paint
- Limited Base Warranty - 2 Years/400 Hours Standby
Specifications
| Manufacturer's Warranty |
2 Yr Consumer Limited |
| Rated Watts |
40,000 |
| Voltage |
3 phase (208/240/480v) |
| Start Type |
Automatic w/ transfer switch (not included) |
| Engine |
Cummins Onan |
| Engine Displacement |
2.4L |
| Decibel Level @ 23 ft. |
63db |
| Fuel Consumption (NG) |
519 cu.ft/hr (full load) 304.7 cu.ft/hr (half load) |
| Fuel Consumption (LP) |
5.4 gal/hr (full load) 3.4 gal/hr (half load) |
| Fuel Type |
Liquid Propane or Natural Gas |
What Our Experts Think
The Cummins A051Y420 RS40 40kW Quiet Connect™ Series Home Standby Generator offers robust, reliable power for large homes or commercial spaces. Here’s why it’s a standout choice:
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Powerful 40kW Output: Provides 40kW of continuous power, perfect for homes or businesses with significant power needs, ensuring smooth operation of HVAC systems, appliances, and more during outages.
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Dual Fuel Capability: Runs on both LP and Natural Gas (NG), offering flexibility and longer runtime options during extended power disruptions.
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Liquid-Cooled System: Features a liquid-cooled engine for superior efficiency, quieter operation, and enhanced durability compared to air-cooled alternatives.
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Three-Phase Power: Delivers stable, balanced three-phase 120/208V power, ideal for high-demand residential or commercial applications.
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Quiet Operation: Advanced noise-reduction technology ensures that the generator operates quietly, reducing disruption to your household or neighborhood.
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Automatic Transfer Switch: Instantly detects power loss and automatically transfers to generator power, keeping your home or business fully powered without any action required on your part.
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Weather-Resistant & Durable: Built to withstand the elements with a weather-resistant enclosure, ensuring reliable performance in various environmental conditions.
Q&A
Q: What is the power output?
A: 40kW, ideal for providing reliable backup power to large homes or commercial applications.
Q: What type of cooling system does it use?
A: It features a liquid-cooled system, ensuring efficient cooling for longer-lasting performance and quieter operation.
Q: What fuel types are compatible?
A: This generator supports both LP (liquid propane) and NG (natural gas) for flexible fueling options.
Q: What is the voltage configuration?
A: Three-phase output, ideal for higher power demands in residential and commercial settings.
Q: How quiet is it?
A: The Quiet Connect™ Series is engineered for reduced noise, making it suitable for residential areas and urban environments.
Q: Why choose this generator?
A: With 40kW of backup power, dual-fuel capability, and liquid cooling, it offers dependable performance and quiet operation for large-scale needs.
Q: What makes this generator reliable?
A: Built with Cummins’ advanced engineering, providing robust, long-term reliability during power outages
Maintenance Tips
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Oil Changes: Change the oil every 150 hours or annually, whichever comes first, to keep the engine running smoothly and to prevent wear.
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Air Filter Care: Inspect, clean, or replace the air filter every 100 hours or sooner if necessary to ensure proper airflow and engine performance.
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Fuel System Inspection: Use clean LP or NG, and check for leaks or damage in fuel lines, connections, and pressure regulators.
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Spark Plug Inspection: Periodically check and replace spark plugs to ensure efficient ignition and optimize engine performance.
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Battery Maintenance: Ensure the battery is fully charged, and clean terminals to avoid corrosion, ensuring reliable startup.
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Coolant Level Checks: Monitor coolant levels regularly and check hoses for leaks to avoid overheating.
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Exercise the Generator: Run the generator for 20-30 minutes monthly to maintain internal lubrication and prevent stale fuel.
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Transfer Switch Testing: Test the automatic transfer switch to ensure proper operation and seamless switching between utility and generator power.
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Three-Phase System Check: Inspect the three-phase electrical system for secure connections and proper voltage output.
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Storage: Store the generator in a cool, dry, and well-ventilated area to protect it from extreme weather conditions and moisture.
Damage 
Loss 
Theft 
