The generator would use approximately 1.9 GPH (gallons per hour) at half load.
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Cummins QuietConnect Home Standby Generator, 20 kW (LP)/18 kW (NG), Model# RS20A Warm

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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
Accessories
Warranty
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Product Summary
What's Included
- (1) Home standby generator
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
Key Specs
| Attribute | Specification |
|---|---|
item# | 88877 |
Brand | Cummins Power |
Manufacturer's Warranty | 5 year limited warranty |
Ship Weight | 531.0 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 |
Auto Shutdown | Yes |
Overload Protection | Yes |
Low Oil Shutdown | Yes |
Hour Meter | Yes |
Hertz | 60 |
Engine Cooling | Yes |
Total Harmonic Distortion | <5% |
Product Weight | 531.0000 lb |
Dimensions L x W x H (in.) | 34.125 x 36.0 x 27.3125 in |
Reviews
Questions & Answers
Questions
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· 2 years ago
WHAT IS THE LP FUEL CONSUMPION RATE AT 50 PERCENT LOAD LIKE 2.5 GALLONS PER HOUR ??
1 answer-
ProductExpert6· 2 years ago
Helpful?
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· 3 years ago
Does this unit include a charger for the starter battery that must be purchased separately and placed inside the housing?
1 answer-
ProductExpert6· 3 years ago
The generator would have a built in charger for keeping the battery charged.
Helpful?
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· 3 years ago
Does this have a built in transfer switch? I looked at your site and could not find a Cummins 200 amp transfer switch.
1 answer-
ProductExpert6· 3 years ago
This Cummins generator does not include a transfer switch. See our item #88776 that would include the transfer switch.
Helpful?
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· 3 years ago
How can this generator be installed within 18” of a dwelling? My current generator (LP fueled) is about that distance from the house and when it runs the exhaust fumes enter the soffit and come into the house. What is run time on 400 gal LP?
1 answer-
ProductExpert6· 3 years ago
It has the capability to be set 18" from a dwelling, depending on the application. It needs to be 18" away from any combustibles and at least 5 feet away from any windows or openings that would allow exhaust to enter the home. The unit will use about 1.9 GPH running at 1/2 load. The length of time it would last on a 400 gallon propane tank would vary, depending on the appliances running and how long they run.
Helpful?
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· 6 years ago
What is the THD rating for this generator?
What is the THD% rating for this generator while using natural gas as the fuel source? The Briggs and Straton unit lists is on their description already.
1 answer-
ProductExpert11· 6 years ago
The total harmonic distortion for the generator is less than 5%.
Helpful?
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· 6 years ago
Battery dimensions?
This unit requires a battery, what are the dimensions of the battery box? Is there a suggested CCA (cold cranking amps) capacity?
Will it require a motorcycle or small equipment type battery, or will a small automotive battery work?1 answer-
ProductExpert29· 6 years ago
This unit requires a 12V, Group 51R automotive battery with at least 450 CCA. Battery dimensions will be roughly 9.30"L x 5"W x 8.85"H.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
5 year limited warranty
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$5747.50Shipping:
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Item # 88587
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- $6662.42
Shipping:
Free shipping (lower 48 states) - Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
Specifications
120/240
120/240
120/240
120/240
20
13
17
20
20
13
-
20
18
13
17
18
18
13
-
18
84
54.2
70.8
84
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
Cummins
Cummins
QSJ999
QSJ999
QSJ999
QSJ999
999 cc
999 cc
999 cc
999 cc
65 dB
65 dB
64 dB
65 dB
Aluminum
Aluminum
Aluminum
Aluminum
Automatic and Manual
Automatic and Manual
Automatic and Manual
Automatic and Manual
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
-
-
-
Yes
-
-
Yes
Yes
-
-
-
60
-
-
60
Yes
Air
Air
Yes
<5%
<5%
-
<5%
531.0000 lb
479.0000 lb
531.0000 lb
596.0000 lb
34.125 x 36.0 x 27.3125 in
34.125 x 36.0 x 27.3125 in
34.125 x 36.0 x 27.3125 in
34.125 x 36.0 x 27.3125 in
-
-
-
200
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