Cummins RS20A Cold Weather 20kW Quiet Connect Home Standby Generator — C20N6H
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At a glance
- Standby Rating
- 20 kW (LP) / 18 kW (Natural Gas)
- Voltage/Phase
- 120/240V, Single Phase, 60 Hz
- Fuel
- Natural Gas or LP (field-selectable)
- Engine
- Cummins QSJ999G, 999cc V-twin, naturally aspirated
- Cooling
- Air-cooled
- Sound Level
- 65 dB(A) at 23 ft (normal load)
- Dimensions
- 34.1" L x 36" W x 27.3" H
- Weight
- Approx. 531-540 lbs
- Cold Weather
- Factory-equipped for operation down to 0°F out of the box
- THD
- Less than 5% total harmonic distortion
- Warranty
- 5-year / 2,000-hour limited (2 yrs travel & labor, 5 yrs parts)
Product specs
- Dimensions
- 34.1 x 36.0 x 27.3 in
- Weight
- 531 lbs
- Key specs
- Rated output: 18 kW (natural gas) / 20 kW (LP) Engine: Cummins QSJ999G naturally aspirated V-twin air-cooled, 999 cc, 3600 rpm Cooling: Air-cooled Sound level: 65 dBA Fuel: Natural gas or LP
Why this generator
- 20 kW of clean standby power (under 5% THD) safe for sensitive home electronics
- Cold-weather ready out of the box — runs reliably down to 0°F with no add-on kit (C20N6H Cold Weather model)
- Quiet 65 dB(A) operation, among the quietest air-cooled home standby generators
- Field-selectable Natural Gas or LP fuel with Intelligent Load Management to power multiple central A/C units
- Tough 180-mph wind-rated aluminum enclosure, NFPA 37 compliant for installation just 18 inches from the home
- Backed by a 5-year / 2,000-hour limited warranty including 2 years of travel and labor coverage
Everything you need to know
20kW, 120/240V, 60 Hz, NG/LP, 75/83.3A, 3600 rpm, 100A circuit breaker, remote monitoring capability, 4A battery charger, 65 dB(A) rated sound-attenuated weather protective enclosure, alternator slip ring heater, Includes the extreme cold weather kit installed. NFPA 37 compliant.
Part Number: A071Z202
Free shipping to the contiguous US.
Frequently asked questions
What fuel does the C20N6H run on?+
The C20N6H runs on natural gas or LP (propane), selectable at install.
Does the price include installation?+
No — the online price covers the unit shipped free to the lower 48. Professional installation is available in NC & SC on a quote basis; outside that area we'll help you find a qualified local installer.
How fast does it ship?+
Free curbside / liftgate shipping to the contiguous 48 states. Typically ships in 1 to 2 weeks.
What warranty is included?+
5-year limited factory warranty, registered and supported directly through Cummins.
Is financing available?+
Yes — 0% APR financing is available on qualifying orders. Ask us for details before checkout.
Free curbside shipping
Liftgate delivery to the lower 48. Typically ships in 1 to 2 weeks.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Cummins warranty
Full 5-year limited warranty — registered and supported through Cummins directly.