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Cummins Power Generation

Model #

RS20ACE

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Cummins 20 kW Generator Quiet Connect Home Standby + 200-Amp ATS for Extreme Cold to -40° F | RS20ACE

  • Cummins 20kW Generator RS20ACE Quiet Connect Home Standby
  • 200-Amp SE-Rated, indoor/outdoor Automatic Transfer Switch.
  • Equipped to start and run down to -40 degrees Fahrenheit
  • Intelligent Load Management (sold separately) for heavy loads
  • Remote Monitoring/Operation via Cloud Connect Smartphone App
  • Rated for installation as close as 18-inch to the home
  • Extremely Quiet Operation – 65 dB or less
  • No-Start Flexible Exercise to Suit Owner Preference
  • Cummins 5-Year Limited Warranty

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Cummins Power Generation RS20ACE Details and Specifications

Cummins 20 kW Generator Cold Weather Equipped to -40° F

20kW     Cold Weather Starts at -40° F     Intelligent Load Management     Remote Monitoring / Control

Cummins RS20ACE with 200-Amp, Service-Entrance-Rated, NEMA 3R Indoor/Outdoor Automatic Transfer Switch supplies your whole house during an outage.

Equipped to handle extreme cold weather right out of the box. The Cummins 20 kW Generator Extreme Cold Weather Home Standby Generator operates in temperatures down to -40 degrees Fahrenheit. Includes all the features and benefits of the Cummins Quiet Connect Standby Generators warm weather models.

The generator connects to your home with the included automatic transfer switch and runs on your existing natural gas or propane supply. It monitors the power company distribution lines 24/7, then automatically starts and runs when it detects an outage and continues to run until the utility restores power.

Note: Early Models had a different Fuel Inlet Connection location. See the Cummins Quiet Connect Specifications for Location Details.

Cummins RS20ACE Quiet Connect 20kW Generator Extreme Cold

The Cummins RA212S3 200-Amp Automatic Transfer Switch with Aluminum NEMA 3R enclosure rated for indoor and outdoor use installs between the utility meter and the main circuit breaker panel. The generator controller automatically starts the generator within seconds after it detects an outage. After startup, it signals the transfer switch to isolate the home from the utility lines and supply it with power from the generator. It all happens automatically within seconds after an outage.

Powerful motor starting capability allows the Cummins RS20ACE to start a 5-ton air conditioner while operating a full household load and supply clean power to sensitive electronics at the same time. From a no-load condition to accepting a normal household load, the voltage varies by no more than 1.25 percent. Under steady-state conditions, the RS20ACE maintains voltage within 1.25 percent and frequency never varies more than 1.25 percent. Clean, worry free power you can count on.

The 20kW Generator with Intelligent Load Management (**kit sold separately) learns and remembers the power requirements of 240-volt loads like air conditioners. Load management allows a smaller, more fuel-efficient generator to manage up to four central air conditioners or other heavy loads. The A051C329 Cummins Load Management Kit controls two appliances like an air conditioner or water heater. Two kits can control four loads.

Monitor and control the Cummins Quiet Connect 20kW from almost anywhere. Advanced Remote Access (no cost) uses the highway safety and monitoring network for vehicles and equipment. Check generator status, program exercise periods, even manually start and stop the generator using the Cloud Connect Smartphone App on phones, tablets, or computers. Send performance data directly to your authorized dealer for worry-free maintenance.

A compact, efficient design packs the Cummins 20kW Generator into a 34 x 36 x 27-inch enclosure. The generator meets NFPA 37 code for installation just 18-inches from the home. A sleek and attractive cabinet blends into the landscaping.

Patented sound technology and an advanced housing design with a corrosion resistant aluminum exterior and galvanized steel interior reduces noise and vibration. Sound levels of just 65dBA make Cummins Quiet Connect 20kW home standby generators among the quietest in their class.

The Cummins RS20ACE for Extreme Cold Weather comes equipped for operation down to -40 degrees Fahrenheit. The engine oil heater warms the engine for better lubrication and easier cold cranking. A battery warmer ensures maximum power for cold weather starts at temperatures well below zero. Ideal for locations across the northern United States.

A patented “Crank-Only” mode reduces wear and tear during the exercise cycle. The engine cranks without starting while the controller performs diagnostics. The generator gets the exercise it needs, while the controller ensures that the generator is operating correctly. This eco-friendly feature saves fuel and produces less noise than operating the generator for 5 to 20 minutes every week.

A Cummins QSJ999G Engine powers the Cummins RS20AE home standby generator. Cummins, the world-class leader in diesel and natural gas engines, designed and built the propane or natural gas engine. The installer selects the fuel-type during installation.

Cummins 20kW Generator Extreme Cold Equipped

Cummins Power Generation supports the Cummins 20kW Generator with the world’s largest and best trained worldwide network of certified distributors and dealers. They answer questions about maintenance and operation and offer a complete selection of maintenance parts, accessories, and products along with manuals and specification sheets.

The Cummins five-year/2000-hour limited warranty covers travel and labor for two years and parts for five years.

Make the RS20ACE installation easier with a Cummins Composite 3-Inch Concrete Generator Pad. Required by some local building codes, they keep the generator from sinking into the dirt. Using a premade generator pad eliminates the need for a poured concrete base or a pea gravel bed.

Requires a 12-Volt Group 51R, 450 CCA Battery—purchase locally.

Product Specifications

Reviews

  • 5
    Peace of mind

    Posted by David on 7th Jan 2024

    Very happy with our Cummins 20Kw. It seems to run quieter than a neighbor's Generac. Personally, I think it looks better and less obtrusive than the Generac. Highly recommend getting a professional electrician and plumber for installation.

  • 5
    Well done!

    Posted by J S. on 15th Dec 2023

    Knowledgeable helpful staff, fast shipping, arrived in perfect shape, delivery driver was great. Couldn’t be more pleased.

  • 5
    Nice

    Posted by Marsha C. on 31st Mar 2023

    Nice

  • 1
    Factory support & troubleshooting

    Posted by Tim S. on 14th Mar 2023

    We installed this generator for a customer who bought it himself with a 400 amp transfer switch. we have installed many generators over the years--Generac, Kohler, Columbia and a few other off brand names. The basic installation was no different than any other. The tricky part is with the control wiring. The generator needs 3 low voltage control wires from the transfer switch to the generator and a 120 volt, 20 amp circuit for the battery charger, block heater, oil heater and battery heater. The installation manual and wiring diagram are very vague on this. I consider the control wiring the most important part of the installation. In the transfer switch is a terminal block for 9 wires and coincidently in the generator, there are also 9 wagos for termination. Only 3 a43 used and a jumper is installed in the transfer switch. How do I know this? Technical support from the factory is non-existent. I called and described the fault and factory tech immediately stated I needed a service call from the local dealer. NOT CHEAP! Once the service tech showed up, he called the tech service at the factory and we discovered the need for only 3 control wires not 9. Oh and the labeling is helter skelter too. The generator lable says 1-TB1 which one would think was terminal 1 on the terminal board in the transfer switch. NOPE. It goes to terminal 3. Not happy with the lack of instructions nor tech support from cummins. Will not recommend a cummins generator.

  • 1
    A good unit poorly packaged and Norwall lost a customer.

    Posted by Robert C. on 15th Oct 2021

    I waited many weeks for this product, was charged $130.00 extra shipping because it was a rural delivery, it came on a pallet covered in cardboard and plastic like most other generators do however there were two 2" holes in the bottom for securing that are not closed open to the weather which allowed a family of mice to move in and start to damage things. There was no physical damage on the outside and it did sit on the job for a week before I opened it up. Norwall said I should have installed it right away but who ships electrical equipment with holes open to the weather. The people at Norwall took advantage of that and said they could be of no help because I didn't notify them within 24 hrs. My customer now doesn't want a damaged generator and I have to buy a new one somewhere else. The least Cummins could have done was to put plugs on the holes before shipping! I have recommended Norwall to many and have bought at least 6 units from them but no more. Rob C, Massachusetts Master Electrician.

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Cummins Power Generation

Model #

RS20ACE

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