Cummins QuietConnect™ QSJ999G 20kW Air-Cooled: RS20A Series Home Standby Generator

Robust Design – The generator is designed to operate in cold weather with performance down to 0 °F (-18 °C) out of the box. The extreme cold weather models can perform down to -40 °F (-40 °C) out of the box. It is tested and certified per the latest EPA, UL, and CSA standards. The generator meets NFPA 37 which allows it to be installed 18 inches from a building. It has powerful motor starting ability and can easily start and run a 5-ton A/C¹ under full pre-load.

Intelligent Load Management - The generator can control up to 4 loads and continuously monitors how much power is required independently for each load. It then controls each load for maximum utilization of generator power by only restoring loads the generator has capacity to run.

Flexible Exercise Modes - Exercise modes can be set for time, date, and frequency that suits the owner. Our patented ‘Crank only’ exercise mode allows the generator to crank the engine and run diagnostics without starting the engine. This reduces wear and tear on the engine, fuel costs, and further reduces the sound of an already quiet generator.

Remote Monitoring - Remote monitoring is built into every generator. Using a computer, tablet, or smart phone, an operator can monitor, change exercise modes, and manually run the generator remotely.

Generator and ATS packaged sets – The RS20AC comes with a 20-kW generator and 200A service entrance rated ATS in one box to make ordering more convenient.

FEATURES

Cummins Quiet Connect™ Series 17kW Air-Cooled Standby Generator

• New for 2017 with improved design, exercise modes, load management & monitoring

Weather Protective Aluminum/Steel Sound Enclosure

• Can be installed* within 18" of a build (NFPA 37) - Always check local building codes
• Sound dampening engineering limits noise level to a low 65dB(A) @ 7M

999cc Cummins Air-Cooled V-Twin OHV Engine

• Field-selectable, runs on ultra efficient natural gas or LP (vapor)
• Low oil pressure shutdown provides added safety and longevity

< 5% THD (Total Harmonic Distortion)

• Clean power that won't damage your electronic devices

Patented "Crank Only" Exercise Mode

• Provides diagnostics without running engine for less wear and lower fuel costs
• Allows user to select time, date and frequency of exercise

Load Management Capability (Requires Load Management Kit - Sold Separately)

• Maximizes generator power by intelligently managing up to 4 electrical loads

Cummins Connect Cloud For Remote Monitoring (Mobile App)

• Monitor, exercise and manually run the generator
• Use your computer, tablet or phone for maximum monitoring flexibility

Cold Weather Equipped

• Operates in cold weather with performance down to 0 °F
• Cold weather accessories allow for even colder operation (Sold Separately)

Requires Cummins Automatic Transfer Switch (Sold Separately)
Standard 5-Year / 2,000 Hour Limited Warranty

Weight, Size, and Sound Level Size: Length: 34.1 in (865 mm),

Width: 36.0 in (915 mm),

Height: 27.3 in (694 mm)

Sound: 65 dB(A) at 23 ft. (7 m) at normal load2

SPECIFICATIONS

Engine

• Natural gas/propane

• Engine air cleaner

• Engine oil (Synthetic)

• Oil drain extension tube

• Low oil pressure shutdown

Fuel System

• Single fuel – natural gas or propane vapor, field selectable (Set to Natural gas from factory)

Alternator

• 60 Hz, 1 phase, < 5% THD (total harmonic distortion)

• Long life electrographic DC brushes

• Slip ring heater

Control

• Display language – English

• Under hood built in display

Electrical

• Single 100A circuit breaker, UL certified (On all models)

• Battery charging alternator
• Battery charger – 4 Amps

Cooling

• Single direct drive blower

Enclosure

• Aluminum exterior, galvanized steel interior

• Evaluated to withstand 180 mph wind loads in accordance with ASCE7-10

Code Compliance

• UL 2200
• CSA 22.2 and B149.1
• EPA emissions
• NFPA 37 – 18 inches

Warranty Base:

5 years / 2000 hours Extended warranties available

Generator Set performance

Voltage regulation, no load to full load: ±1.25%

Steady state voltage variation: ±1.25%

Frequency regulation: Isochronous

Motor starting kVA (30% voltage dip): 40 for RS20A/AC,

 34 for RS17A, and 26 for RS13A

Steady state freq. variation: ±1.25% (±1.5% @ No load)

Operating temperature: 122 °F (50 °C) to -40 °F (-40 °C)

Engine Specifications

Model: QSJ999G

Design: Naturally aspirated, V twin air cooled

Bore: 3.54 in (89.9 mm)

Stroke: 3.09 in (78.5 mm)

Displacement: 60.96 inch3 (999 CC)

Cylinder block: Aluminum

Battery capacity: Group 51R, 450 CCA at ambient temperature of 32 °F (0 °C)

Starting voltage: 12 Volt, negative ground

Oil Filter type: Spin-on

Rated speed: 3600 rpm

Fuel Supply Pressure

Minimum - in H2O (kPa): NG - 3.5 (0.87) / LP - 6.0 (1.49)

Maximum - in H2O (kPa): NG - 12.0 (3.0) / LP - 12.0 (3.0)