Kohler · RZG Series (Industrial Gaseous)

Kohler 100RZGD

100 kW standby · LPG · Liquid-cooled

100 kW LPG industrial standby generator. Open-frame gaseous standby for commercial and industrial applications on propane.

Kohler Kohler 100RZGD generator — specifications and details
Standby power
100 kW
Voltage options
120/208V, 277/480V
Frequency / Phase
60 Hz · 3-phase
Engine
General Motors Vortec 5.7L · 5.7L
Alternator
Kohler Brushless, Permanent-Magnet
CommercialHealthcareGovernmentindustrial-light
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Overview#

The Kohler 100RZGD is a 100-kilowatt LPG industrial standby generator in an open-frame (skid-mounted) configuration. Rated at 73-100 kW standby depending on voltage, it uses a General Motors V8 engine paired with a brushless permanent-magnet alternator at 1800 RPM. The open-frame design is typical for indoor mechanical rooms or locations where a separate enclosure or building houses the generator.

Gaseous vs diesel at 100 kW#

At this capacity, gaseous generators eliminate on-site fuel storage requirements and SPCC compliance obligations. Propane offers clean combustion with lower emissions than diesel, and there is no fuel degradation concern during low-runtime standby duty. The trade-off is dependence on propane delivery infrastructure during extended outages.

Our service experience#

PowerGen provides installation, maintenance, and emergency service for Kohler gaseous generators throughout Northern California. The GM V8 platform in the RZG series is well-established with broad parts availability, and we structure PM programs around annual ignition and coolant system inspections.

Engineering specifications

Physical

Length
110.2 in
Width
44.1 in
Height
54.3 in
Wet weight
3,094 lb

Fuel system & runtime

NG required pressure
7 in WC

Photos

Kohler 100RZGD — product photo

Documents & downloads

Spec sheets & manuals

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Service intervals

Manufacturer-recommended intervals for the Kohler 100RZGD under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter
Every 200 hours or 12 months
Coolant change
Every 2000 hours
Air filter
Every 500 hours
Spark plugs
Every 500 hours
Major overhaul
≈ 6,000 hours
Load bank test
Every 12 months

Common failure modes

What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.

ComponentSymptomTypical hoursSeverity
Spark plugs / ignitionMisfire under load, rough idle, cylinder dropout500+minor
Fuel pressure regulator / vaporizerHard starting, gas pressure fault, erratic idle6,000+moderate
Coolant thermostatOvercooling at light load, high fuel consumption8,000+minor
Battery (starting)Slow crank, failed exercise8,760+minor

Frequently Asked Questions

What is the standby rating of the Kohler 100RZGD?
The 100RZGD is rated 73-100 kW standby (73-125 kVA) depending on voltage configuration, operating on LPG at 60 Hz.
What fuel does the Kohler 100RZGD use?
The 100RZGD operates on LPG (propane). Natural gas and dual-fuel variants are also available in the RZG line.
What is the difference between RZX and REZX models?
RZX designates the open-frame (skid-mounted) configuration, while REZX is the enclosed (sound-attenuated or weather-protective) version. Both use the same engine-alternator package; the difference is the enclosure.

Compatible equipment

Engine

Transfer switches

More in the RZG Series (Industrial Gaseous)

Kohler RZG Series: 100–150 kW LPG generators with GM and PSI engines in enclosed and open-frame configurations.

View all 4models in this series →

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