Cummins 20kW Standby Generator

Cummins RS20A

Brand: Cummins
Equipment Price: starting at $5042

The Cummins RS20A Generator, proudly offered by Carolina Energy Systems, is a reliable and efficient standby power solution designed for residential use. One of Cummins Generators’ most popular models, this generator can provide seamless backup power to essential household appliances and systems during unexpected outages, ensuring uninterrupted comfort and convenience. Carolina Energy Systems provides customers with access to the Cummins RS20A Generator, backed by our expertise and commitment to delivering dependable power solutions for homeowners.

Product Description
  • Robust Design: The generator is engineered to operate effectively in cold weather, even at temperatures as low as 0°F (-18°C) without any modifications. Additional Cold Weather accessories enable it to function in even colder conditions. The unit is thoroughly tested and certified to meet the latest EPA, UL, and CSA standards, ensuring its safety and compliance. Moreover, it adheres to NFPA 37 regulations, allowing it to be installed just 18 inches away from a building. Its powerful motor starting ability enables it to effortlessly handle the full pre-load of a 5-ton A/C unit.
  • Flexible Exercise Modes: Owners have the freedom to set exercise modes based on their preferred time, date, and frequency. The generator offers a patented ‘Crank only’ exercise mode, enabling the engine to crank and perform diagnostics without actually starting the engine. This feature minimizes engine wear, reduces fuel costs, and makes the already quiet generator even more discreet.
  • Intelligent Load Management: The generator is equipped with intelligent load management capabilities, allowing it to control up to 4 loads independently. It continuously monitors the power requirements for each load and efficiently manages the distribution of generator power. By only restoring loads that the generator has sufficient capacity to handle, it ensures optimal utilization of available power.
  • Remote Monitoring: Every generator is equipped with remote monitoring functionality, providing convenience and ease of use. Operators can monitor, modify exercise modes, and manually run the generator remotely using a computer, tablet, or smartphone.
  • Generator and ATS Packaged Sets: The RS20AC package includes a 20 kW generator and a 200A service entrance rated Automatic Transfer Switch (ATS) conveniently housed in one box. This packaging simplifies the ordering process and ensures that all essential components are provided together.

Overall, this generator model offers a robust and reliable solution for cold weather operation, provides flexible exercise options, optimizes power distribution, and incorporates user-friendly remote monitoring capabilities to enhance convenience and efficiency. Additionally, the package includes a generator and ATS combination to meet all power supply needs in one convenient unit.

Generator Specifications

Engine air cleaner
Engine oil (Synthetic)
Oil drain extension tube
Low oil pressure shutdown
Low oil level warning or monitoring

Fuel system

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


60 Hz, 1 phase, < 5% THD (total harmonic distortion)
Long life electrographic DC brushes
Slip ring heater


Display language – English
Under hood built in display


Single 100A circuit breaker, UL certified
(On all models)
Battery charging alternator
Battery charger – 4 Amps


Single direct drive blower


Aluminum exterior, galvanized steel interior

Code compliance

UL 2200
CSA 22.2 and B149-2
EPA emissions
NFPA 37 – 18 inches

Generator set application

Governor regulation class
Voltage regulation, no load to full load: ±1.25%
Steady state voltage variation: ±1.25%
Frequency regulation: Isochronous
Steady state freq. variation: ±1.25% (±1.5% @ No load)
Operating temperature: 122 °F (50 °C) to 0 °F (-18 °C)


Base: 5 years / 2000 hours
Extended warranties available


Shipping pallet

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