This home standby generator is rated for full output under standard conditions at sea level and an ambient temperature of 60°F (15.5°C); its capacity must be reduced at higher elevations and in warmer environments. As altitude increases, the thinner air limits performance, requiring a 3.5% reduction for every 1,000 feet (304.8 meters) above sea level. Higher temperatures also affect output; for every 10°F (5.5°C) above 60°F (15.5°C), the generator’s capacity should decrease by about 3%.
Free Gift Card Details
$100 Order
$250 Order
$500 Order
$1000 Order
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 11/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Cummins QuietConnect Home Standby Generator with Transfer Switch, 20kW, LP/18kW NG, 120/240 Volts, Single Phase, Model# RS20A Warm

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- Best-in-class 65dB operation
- Runs on propane or natural gas
- Intelligent load management allows you to turn equipment on or off based on your needs
- Remote diagnostics lets you monitor your generator from your computer or mobile device
- Compact design can be installed as close as 18in. from you home
See full description
Description
Key Specs
Reviews
Q & A
Warranty
Compare
Product Summary
What's Included
- (1) 20kW Home standby generator (1) 200 Amp SE transfer switch
Downloads
Features + Benefits
- Best-in-class 65dB operation
- Runs on propane or natural gas
- Intelligent load management allows you to turn equipment on or off based on your needs
- Remote diagnostics lets you monitor your generator from your computer or mobile device
- Compact design can be installed as close as 18in. from you home
- Strong enclosure designed to withstand winds up to 180 MPH
- Cold-start capability down to 0°F
- Cummins Part Number: A071Z402
Key Specs
| Attribute | Specification |
|---|---|
item# | 88776 |
Brand | Cummins Power |
Manufacturer's Warranty | 5 year limited warranty |
Ship Weight | 596.0 LB |
Voltage | 120/240 |
Rated Kilowatts LP | 20 |
Surge Kilowatts LP | 20 |
Rated Kilowatts NG | 18 |
Surge Kilowatts NG | 18 |
Max. Amps | 84 |
Fuel Type | Dual Fuel - Natural Gas and Propane |
Engine Brand | Cummins |
Engine Model | QSJ999 |
Engine Displacement | 999 cc |
| Attribute | Specification |
|---|---|
Noise Level | 65 dB |
Enclosure Material | Aluminum |
Start Type | Automatic and Manual |
Battery Required | Yes |
Battery Included | No |
Transfer Switch Amps | 200 |
Auto Shutdown | Yes |
Low Oil Shutdown | Yes |
Hertz | 60 |
Engine Cooling | Yes |
Total Harmonic Distortion | <5% |
Product Weight | 596.0000 lb |
Dimensions L x W x H (in.) | 34.125 x 36.0 x 27.3125 in |
Reviews
Questions & Answers
Questions
-
· 4 months ago
Does anyone know or have experience of this generator being installed at 8000 ft above sea level? Fuel source would be LP or NG. Generac gen 2 generators will not run here.
1 answer-
ProductExpert30· 4 months ago
Helpful?
-
-
· 2 years ago
We have an oceanfront home, Generator pad is blocked from direct wind, but sea winds will rust. What is the base, chassis, and mounts constructed of? Steel, aluminum, plastic?
1 answer-
ProductExpert23· a year ago
The Cummins QuietConnect RS20A Home Standby Generator features a weather-protective aluminum enclosure with a galvanized steel interior. This combination helps provide durability and resistance to rust, which is particularly beneficial for oceanfront homes exposed to sea winds.
Helpful?
-
-
· 2 years ago
Is this genorater air cooled
1 answer-
ProductExpert6· 2 years ago
The generator would be air cooled.
Helpful?
-
-
· 2 years ago
what does RS20A Warm mean?
1 answer-
ProductExpert11· 2 years ago
This will mean it is a residential stand by 20KW generator designed for warm climates.
Helpful?
-
-
Commish· 2 years ago
What is the country of origin for this air compressor?
1 answerOriginally posted on grizzly.com-
Customer Service· 2 years ago
We appreciate your question. This air compressor is manufactured in the US.
-
-
· 2 years ago
Is this an 1800 or 3600 rpm
1 answer-
ProductExpert6· 2 years ago
This generator would run a 3600 RPM.
Helpful?
-
-
· 5 years ago
How many gallons of Propane does this generator use when operating at full power for 1 hour?
1 answer-
ProductExpert29· 5 years ago
This will have a consumption rate of approximately 2.83 gallons per hour at full load.
Helpful?
-
-
· 5 years ago
Can this be trailer mounted for portable applications ?
1 answer-
ProductExpert29· 5 years ago
This generator is not designed for portable applications and cannot be trailer mounted.
Helpful?
-
-
· 5 years ago
Where are Cummings products manufactured? Where are the parts for Cummings generators manufactured?
1 answer-
ProductExpert31· 5 years ago
This generator is manufactured in the USA from globally sourced parts and materials.
Helpful?
-
-
· 5 years ago
What is the conversion factor for SCFH (at 4psi?) per gallon of propane as delivered?
1 answer-
ProductExpert11· 5 years ago
The fuel consumption at full load for natural gas is 256 SCFH or 255,900 BTU/HR. The fuel consumption at full load for propane is 108 SCFH or 270,100 BTU/HR. The maximum pressure for either fuel under any condition is 3.2 kPa (13 inch water column).
Helpful?
-
Warranty
Manufacturer's Warranty
5 year limited warranty
Compare with Most Popular in Home Standby Generators
See All Home Standby Generators
See All Cummins Power Home Standby Generators
Currently Viewing This Product
$6662.42Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- $22,663.33
Shipping:
Free shipping (lower 48 states) - Factory shippedStore Pickup:
Not available - online only
- $13,399.00
Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- $18,738.54
Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
Specifications
120/240
120/208
120/240
120/240
20
50
25
36
20
50
25
36
18
50
25
36
18
50
25
36
84
173
104
108
Dual Fuel - Natural Gas and Propane
Dual Fuel - Natural Gas and Propane
Dual Fuel - Natural Gas and Propane
Dual Fuel - Natural Gas and Propane
Cummins
Cummins
Generac
Cummins
QSJ999
QSJ5.9
In-line
QSJ2.4
999 cc
5,900 cc
1,500 cc
2,400 cc
65 dB
69 dB
-
67 dB
Aluminum
Aluminum
Aluminum
Aluminum
Automatic and Manual
Automatic and Manual
Automatic
Automatic and Manual
Yes
Yes
Yes
Yes
No
No
No
No
200
-
-
-
Yes
Yes
Yes
Yes
Yes
Yes
-
Yes
60
60
-
60
Yes
Yes
-
Liquid
<5%
<5%
-
<5%
596.0000 lb
lb
lb
1294.0000 lb
34.125 x 36.0 x 27.3125 in
119.0 x x in
76.8 x 35.0 x 46.0 in
94.0 x 34.0 x 45.5 in
-
Yes
-
Yes
-
-
-
Yes
See All Home Standby Generators
See All Cummins Power Home Standby Generators
Recently Viewed Items
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.



