Equipped with 2400 cc engine, the Cummins Quiet Connect RS Cummins A051Y424 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 A051Y424 RS40 40kW Quiet Connect™ Series Home Standby Generator is a top-tier choice for homeowners and businesses needing uninterrupted power. Here’s why it stands out:
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Exceptional 40kW Output: Delivers 40kW of continuous power, perfect for large homes or commercial applications with high energy demands, ensuring critical systems like HVAC, refrigeration, and electronics keep running smoothly during an outage.
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Dual Fuel Flexibility: Runs on both LP and Natural Gas (NG), offering reliable fuel options for longer runtime and greater convenience during extended power disruptions.
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Liquid-Cooled Engine: Designed with a liquid-cooled engine for enhanced efficiency, quieter operation, and a longer service life compared to air-cooled generators.
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Three-Phase Power: Provides stable and balanced three-phase 120/208V power, suitable for high-demand residential and commercial environments.
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Quiet Operation: Advanced Quiet Connect™ technology reduces noise, ensuring minimal disruption to your home or business during use.
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Automatic Transfer Switch: The generator automatically detects power outages and switches on without delay, ensuring continuous power without manual intervention.
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Weather-Resistant & Durable: Built to endure the elements with a robust, weather-resistant enclosure, making it reliable in any environment.
Q&A
Q: What is the power output?
A: 40kW, providing reliable backup power for large homes or businesses.
Q: What type of cooling system does it use?
A: Liquid-cooled, ensuring efficient cooling, quieter operation, and longer-lasting performance.
Q: What fuel types are supported?
A: Compatible with both LP (liquid propane) and NG (natural gas) for versatile fueling options.
Q: What is the voltage configuration?
A: Three-phase output, perfect for higher power demands in residential and commercial applications.
Q: How quiet is it?
A: The Quiet Connect™ Series is designed for quiet operation, making it ideal for residential neighborhoods or quiet areas.
Q: Why choose this generator?
A: With 40kW of power, dual-fuel capability, liquid cooling, and quiet operation, it's an excellent choice for reliable home or business backup.
Q: What makes this generator reliable?
A: Cummins’ trusted engineering provides efficient, durable performance to ensure your home or business stays powered when needed most.
Maintenance Tips
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Oil Changes: Change the oil every 150 hours of use or annually to ensure proper lubrication and prevent engine damage.
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Air Filter Maintenance: Inspect and replace or clean the air filter every 100 hours to keep the engine operating efficiently.
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Fuel System Care: Use clean LP or NG, and check the fuel lines, connections, and pressure regulators for leaks or wear.
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Spark Plug Inspection: Inspect and replace spark plugs as needed to maintain smooth ignition and optimal engine performance.
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Battery Maintenance: Keep the battery charged, clean the terminals, and check for corrosion to ensure reliable starting.
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Coolant Level Check: Regularly check coolant levels to prevent overheating and inspect hoses for leaks or wear.
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Exercise the Generator: Run the generator for 20-30 minutes monthly to lubricate components and prevent fuel degradation.
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Transfer Switch Testing: Test the automatic transfer switch to ensure seamless operation and reliable switching between grid and generator power.
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Three-Phase System Inspection: Ensure the three-phase system connections are secure and that the generator is providing consistent voltage output.
Damage 
Loss 
Theft 
