Kohler 20KW 277/480V 3-Phase Standby Generator with App Connect New - 20RCA-QS9
Our most popular generators for backup power provide award-winning reliability and performance. When you lose power during an outage or storm, a hard-working 17/21 kW KOHLER generator keeps your appliances working, the heat or AC running and your security system on.
What our Experts Think
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Commercial‑ready 3‑phase backup power
Designed for 277/480 V three‑phase electrical systems, this Kohler standby generator delivers up to 20 kW of reliable power for small commercial sites, offices, and industrial loads during utility outages.
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Fast automatic response
With ≈10 second automatic startup upon grid failure, it restores critical circuits quickly—minimizing downtime for HVAC, lighting, security systems, and sensitive equipment.
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Clean, stable power quality
Built‑in PowerBoost™ and digital voltage regulation ensures consistent voltage with low harmonic distortion, protecting electronics and motors under varying loads.
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Proven Kohler engine & components
Rugged Kohler CH1000 engine with hydraulic lifters reduces maintenance needs, while the aluminum enclosure resists weather and corrosion for long service life.
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Smart remote monitoring (App Connect)
Integrated KOHLER® Energy Management App lets you track performance, receive alerts, and monitor system health remotely, improving peace of mind and preventive maintenance.
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Fuel flexibility & ease of install
Runs on natural gas or LPG, and pairs seamlessly with compatible transfer switches and load‑management modules—offering adaptable setup options for commercial sites.
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Industry‑leading coverage
Backed by a premium 5‑year/2 000‑hour limited warranty, highlighting Kohler’s commitment to durability and support.
Q&A
Q: What is this Kohler 20RCA‑QS9 generator?
A: A commercial‑grade 20 kW 277/480 V 3‑phase standby generator designed to automatically supply backup power during outages for industrial, commercial, and multi‑phase system applications.
Q: What power and voltage does it provide?
A: It delivers up to 20 kW rated output at 277/480 V 3‑phase, ideal for large electrical loads, motors, HVAC systems, and business equipment.
Q: What fuel types are supported?
A: Runs on natural gas or liquid propane (LP) with field‑convertible capability for flexible installation.
Q: How quickly does it restore power?
A: Automatically starts and restores power to connected loads within roughly 10 seconds of utility failure.
Q: Can I monitor and control it remotely?
A: Yes — supports Kohler Energy Management App connectivity for remote monitoring, alerts, and performance tracking.
Q: What reliability and quality features are included?
A: Includes PowerBoost™ technology, RDC2 digital controller, aluminum enclosure with service access, and ±1 % digital voltage regulation for clean, stable power.
Q: How loud is the generator?
A: Operates quietly for a commercial unit, approximately 64–69 dB(A) depending on conditions.
Q: What safety and installation features are important?
A: UL‑2200, EPA, CSA, and cUL listings; built‑in mounting pad; and compatibility with automatic transfer switches (sold separately).
Maintenance Tips
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Schedule regular oil & filter changes as per the engine manual to ensure smooth operation and reduce wear.
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Run weekly or bi‑weekly exercise cycles with load to prevent moisture buildup and keep internal parts lubricated. Recommended routine exercises improve reliability.
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Check coolant & fuel system frequently (if applicable) — keep clean, topped off, and free of blockages.
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Inspect air intake & exhaust areas to remove debris and allow proper airflow for combustion and cooling.
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Monitor battery & charging system — clean terminals, ensure proper voltage, and replace weak batteries before outages.
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Use the Kohler Energy Management App for alerts, diagnostics, and maintenance reminders.
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Check electrical connections & ATS wiring periodically to avoid start/stop failures.
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Clean enclosure & keep vents unobstructed to maintain cooling and reduce corrosion risks.
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