Kohler 100KW 120/240V 3-Phase Standby Generator Steel New - KG100R-QS3
Reliable power for very large residential or small business needs. Built to weather the storms, our largest natural gas/liquid propane generators with industrial-grade engines keep your family comfortable and your business running when a utility failure or storm knocks out power.
What our Experts Think
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Commercial-grade 3-phase standby power
The Kohler KG100R-QS3 delivers 100 kW of reliable 120/240 V three-phase backup power, making it ideal for large commercial buildings, light industrial facilities, and mission-critical systems that need balanced and continuous power.
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Industrial-strength liquid-cooled engine
Powered by a Kohler 6.2 L liquid-cooled engine running at 1800 RPM, it provides efficient, quieter operation and long service life under heavy standby loads.
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Fast automatic response & clean power quality
The Fast-Response® X excitation system handles full loads within about 10 seconds of an outage, and tight voltage/frequency regulation with ultra-low total harmonic distortion ensures clean, stable power for sensitive equipment.
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Advanced controller with diagnostics
The APM402 controller delivers system monitoring, diagnostics, and local data access, simplifying maintenance and oversight for facility managers.
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Rugged steel enclosure & quieter operation
The sound-attenuating steel housing with corrosion-resistant finish and internal acoustic insulation keeps noise under ~69 dB at 7 m, while withstanding harsh outdoor conditions.
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Block heater & cold-start reliability
Includes a pre-installed block heater for easier starts and quicker warm-ups in low temperatures—important for reliability in colder climates.
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Fuel flexibility (NG & LP)
Designed to run on natural gas or liquid propane with simple field conversion while maintaining emissions compliance.
Q&A
Q1: What applications is this 100 kW generator suited for?
A: Ideal for large commercial buildings, industrial sites, and very large residential three-phase electrical systems requiring reliable standby power.
Q2: Does it automatically restore power during outages?
A: Yes — with an automatic transfer switch (not included), it starts and restores power within ~10 seconds of utility failure.
Q3: What fuel options does it support?
A: Runs on natural gas or liquid propane (LP) with simple field conversion while maintaining emission certification.
Q4: What voltage and phase does it deliver?
A: Delivers 120/240 V three-phase power, suitable for commercial three-phase electrical distribution.
Q5: What engine and performance features are included?
A: Equipped with a Kohler 6.2 L liquid-cooled industrial engine and fast-response excitation system for efficient, stable performance.
Q6: Is the power quality good for sensitive electronics?
A: Yes — advanced voltage and frequency regulation with ultra-low total harmonic distortion ensures clean power for sensitive equipment.
Q7: How quiet and durable is it?
A: The sound-attenuating steel enclosure with acoustic insulation keeps noise under ~69 dB at 7 m and resists corrosion and wear.
Q8: What control and monitoring features are available?
A: Includes a Kohler APM402 controller with advanced diagnostics and remote monitoring capability (remote modules sold separately).
Maintenance Tips
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Run Weekly Exercise Cycle
Perform automatic self-test (≈20–30 minutes) to keep engine lubricated and system outage-ready.
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Change Oil & Filters on Schedule
Replace engine oil, oil filter, fuel filter, and air filter at recommended intervals to protect the industrial engine.
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Inspect Battery & Charger Monthly
Check voltage, terminals, and corrosion to ensure fast, reliable automatic startup.
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Monitor Fuel System (NG/LP)
Verify fuel pressure, regulators, and lines for stable high-load 3-phase performance.
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Check Cooling System Regularly
Maintain coolant levels, inspect radiator, and ensure proper airflow under heavy commercial loads.
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Clean Air Intake & Steel Enclosure
Remove dust, debris, and obstructions to maintain cooling efficiency and protect components.
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Test Under Load Periodically
Simulate real facility demand to confirm voltage stability and phase balance.
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Inspect Electrical Connections
Tighten lugs, breakers, and transfer switch wiring for safe high-amperage operation.
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Monitor Controller & Alarms
Review diagnostics and alerts for early fault detection and preventive action.
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Schedule Annual Professional Service
Certified maintenance ensures warranty compliance and long-term reliability.
