Cummins RS20AC Cold Weather 20kW Quiet Connect Home Standby Generator with ATS — Cold Weather C20N6HC (Combo)
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At a glance
- Standby Power
- 20 kW
- Voltage / Phase
- 120/240V, single-phase, 60 Hz
- Fuel
- Natural Gas or LP Vapor (single fuel, field-selectable)
- Rated Amps (NG / LPV)
- 75 / 83.3 A
- Engine
- Cummins QSJ999G, V-twin OHV, 999cc, 3600 rpm
- Cooling
- Air-cooled
- Sound Level
- 65 dB(A) at 23 ft (7 m), normal load
- Dimensions (L x W x H)
- 34.1 x 36.0 x 27.3 in (865 x 915 x 694 mm)
- Weight
- 596 lbs (271 kg)
- Transfer Switch
- 200A Service Entrance Rated ATS, NEMA 3R aluminum (included)
- Enclosure
- Aluminum exterior, galvanized steel interior; rated to 180 MPH winds
- THD
- Less than 5%
- Cold Weather
- Operates to 0°F out of the box; extreme cold weather kit available for below-zero
- Warranty
- Generator: 5 years / 2,000 hours; Transfer switch: 2 years
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
- Whole-home 20kW backup that powers a 5-ton A/C under full pre-load, with Intelligent Load Management controlling up to 4 loads for maximum generator utilization
- Among the quietest in its class at just 65 dB(A), using Cummins patented sound-attenuation and an advanced housing design
- Ships ready as a combo with a 200-amp service-entrance-rated automatic transfer switch in one box for simpler ordering and installation
- Cold-weather ready out of the box down to 0°F, with an optional extreme cold weather kit to run well below zero
- Corrosion-resistant aluminum enclosure with galvanized steel interior, evaluated to withstand 180 MPH winds and installable just 18 inches from the home (NFPA 37)
- Built-in remote monitoring lets you check status, set exercise schedules, and start/stop from a computer, tablet, or smartphone
- Backed by a 5-year / 2,000-hour limited generator warranty (transfer switch 2 years)
Everything you need to know
Genset: 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. ATS: 200A service entrance rated, NEMA 3R
Highlights
- Factory-authorized Cummins dealer
- MAP pricing — no hidden markup
- Whole-home standby coverage
- Expert sizing & installation available across NC & SC
Part Number: A071Z395
Free shipping to the contiguous US.
Frequently asked questions
What fuel does the C20N6HC run on?+
The C20N6HC 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.
Is a transfer switch included?+
Yes — this configuration ships as a combo with a matched automatic transfer switch (ATS).
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.