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In today's increasingly unpredictable world, reliable backup power is no longer a luxury—it's a necessity. The Cummins RS20A 20kW Home Standby Generator offers superior performance, advanced features, and unmatched reliability, making it the ultimate investment in home protection.
Power outages. They're inconvenient, disruptive, and sometimes downright dangerous. Imagine the frustration of losing power during a summer heatwave, a blizzard, or even just a neighborhood power surge. The impact on your family, your comfort, and your valuable appliances can be significant. But what if you could eliminate that anxiety? What if you could ensure your home stays powered up, no matter what?
With the Cummins RS20A 20kW Home Standby Generator, you can. This isn't just a generator; it's a comprehensive power solution designed to provide reliable backup power for your entire home. This robust and quiet generator, part of Cummins' renowned Quiet Connect™ series, delivers the peace of mind you deserve, knowing that you and your family are protected from the chaos and inconvenience of unexpected power interruptions.
The Cummins RS20A automatically starts when it detects a power outage, eliminating the need for manual intervention. Enjoy uninterrupted power without lifting a finger.
Engineered for quiet operation, the RS20A minimizes noise pollution, ensuring a peaceful home environment for you and your neighbors. Enjoy backup power without the disruptive noise.
This generator intelligently distributes power among your appliances, optimizing energy use and preventing overloads. Maximize efficiency and avoid costly damage.
Monitor your generator's status anytime, anywhere via smartphone, tablet, or computer. Stay informed about your power backup and receive alerts as needed.
Built to withstand extreme weather conditions, including sub-zero temperatures, the RS20A offers reliable performance year-round. Depend on it for power, rain or shine.
Backed by Cummins' extensive 5-year warranty and nationwide dealer network, the RS20A provides peace of mind and readily available support. Enjoy the security of a trusted brand.
Cummins provides a 5-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
| Engine | Natural gas/propane, Engine air cleaner, Synthetic engine oil, 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, Long life electrographic DC brushes, Slip ring heater Control Display language – English, Under-hood built-in display |
| Control | Display language – English, Under-hood built-in display |
| Electrical | Single 100A circuit breaker, UL certified, Battery charging alternator, 4 Amp battery charger |
| Cooling | Single direct drive blower |
| Enclosure | Aluminum exterior, Galvanized steel interior, Withstands 180 mph wind loads (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: ±1.25%, Steady state voltage variation: ±1.25%, Frequency regulation: Isochronous, Motor starting kVA: 40 (RS20A/AC), 34 (RS17A), 26 (RS13A), Steady state frequency variation: ±1.25% (±1.5% @ No load), Operating temperature: 122°F (50°C) to -40°F (-40°C) |
| Model | QSJ999G |
| Part Number | A061C601 |
| Design | Naturally aspirated, V-twin air-cooled |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 3.09 in (78.5 mm) |
| Displacement | 60.96 in³ (999 CC) |
| Cylinder Block | Aluminum |
| Battery Capacity | Group 51R, 450 CCA at 32°F (0°C) |
| Starting Voltage | 12 Volt, negative ground |
| Rated Speed | 3600 rpm |
| Fuel Supply Pressure | Minimum: NG - 3.5 in H2O (0.87 kPa) / LP - 6.0 in H2O (1.49 kPa), Maximum: NG & LP - 12.0 in H2O (3.0 kPa) |
| 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 |
| Voltage / Frequency | 120/240V / 60Hz |
| Weight |
531 lbs/ 241kg |
| Rated Power | 20kW |
| Engine | Natural gas/propane, Engine air cleaner, Synthetic engine oil, 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, Long life electrographic DC brushes, Slip ring heater Control Display language – English, Under-hood built-in display |
| Control | Display language – English, Under-hood built-in display |
| Electrical | Single 100A circuit breaker, UL certified, Battery charging alternator, 4 Amp battery charger |
| Cooling | Single direct drive blower |
| Enclosure | Aluminum exterior, Galvanized steel interior, Withstands 180 mph wind loads (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: ±1.25%, Steady state voltage variation: ±1.25%, Frequency regulation: Isochronous, Motor starting kVA: 40 (RS20A/AC), 34 (RS17A), 26 (RS13A), Steady state frequency variation: ±1.25% (±1.5% @ No load), Operating temperature: 122°F (50°C) to -40°F (-40°C) |
| Model | QSJ999G |
| Part Number | A062E512 |
| Design | Naturally aspirated, V-twin air-cooled |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 3.09 in (78.5 mm) |
| Displacement | 60.96 in³ (999 CC) |
| Cylinder Block | Aluminum |
| Battery Capacity | Group 51R, 450 CCA at 32°F (0°C) |
| Starting Voltage | 12 Volt, negative ground |
| Rated Speed | 3600 rpm |
| Fuel Supply Pressure | Minimum: NG - 3.5 in H2O (0.87 kPa) / LP - 6.0 in H2O (1.49 kPa), Maximum: NG & LP - 12.0 in H2O (3.0 kPa) |
| 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 |
| Voltage / Frequency | 120/240V / 60Hz |
| Weight |
531 lbs/ 241kg |
| Rated Power | 20kW |
| Engine | Natural gas/propane, Engine air cleaner, Synthetic engine oil, 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, Long life electrographic DC brushes, Slip ring heater Control Display language – English, Under-hood built-in display |
| Control | Display language – English, Under-hood built-in display |
| Electrical | Single 100A circuit breaker, UL certified, Battery charging alternator, 4 Amp battery charger |
| Cooling | Single direct drive blower |
| Enclosure | Aluminum exterior, Galvanized steel interior, Withstands 180 mph wind loads (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: ±1.25%, Steady state voltage variation: ±1.25%, Frequency regulation: Isochronous, Motor starting kVA: 40 (RS20A/AC), 34 (RS17A), 26 (RS13A), Steady state frequency variation: ±1.25% (±1.5% @ No load), Operating temperature: 122°F (50°C) to -40°F (-40°C) |
| Model | QSJ999G |
| Part Number | A065D231 |
| Design | Naturally aspirated, V-twin air-cooled |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 3.09 in (78.5 mm) |
| Displacement | 60.96 in³ (999 CC) |
| Cylinder Block | Aluminum |
| Battery Capacity | Group 51R, 450 CCA at 32°F (0°C) |
| Starting Voltage | 12 Volt, negative ground |
| Rated Speed | 3600 rpm |
| Fuel Supply Pressure | Minimum: NG - 3.5 in H2O (0.87 kPa) / LP - 6.0 in H2O (1.49 kPa), Maximum: NG & LP - 12.0 in H2O (3.0 kPa) |
| 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 |
| Voltage / Frequency | 120/240V / 60Hz |
| Weight |
596 lbs/ 271kg |
| Rated Power | 20kW |
| Engine | Natural gas/propane, Engine air cleaner, Synthetic engine oil, 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, Long life electrographic DC brushes, Slip ring heater Control Display language – English, Under-hood built-in display |
| Control | Display language – English, Under-hood built-in display |
| Electrical | Single 100A circuit breaker, UL certified, Battery charging alternator, 4 Amp battery charger |
| Cooling | Single direct drive blower |
| Enclosure | Aluminum exterior, Galvanized steel interior, Withstands 180 mph wind loads (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: ±1.25%, Steady state voltage variation: ±1.25%, Frequency regulation: Isochronous, Motor starting kVA: 40 (RS20A/AC), 34 (RS17A), 26 (RS13A), Steady state frequency variation: ±1.25% (±1.5% @ No load), Operating temperature: 122°F (50°C) to -40°F (-40°C) |
| Model | QSJ999G |
| Part Number | A065D238 |
| Design | Naturally aspirated, V-twin air-cooled |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 3.09 in (78.5 mm) |
| Displacement | 60.96 in³ (999 CC) |
| Cylinder Block | Aluminum |
| Battery Capacity | Group 51R, 450 CCA at 32°F (0°C) |
| Starting Voltage | 12 Volt, negative ground |
| Rated Speed | 3600 rpm |
| Fuel Supply Pressure | Minimum: NG - 3.5 in H2O (0.87 kPa) / LP - 6.0 in H2O (1.49 kPa), Maximum: NG & LP - 12.0 in H2O (3.0 kPa) |
| 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 |
| Voltage / Frequency | 120/240V / 60Hz |
| Weight |
596 lbs/ 271kg |
| Rated Power | 20kW |
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