Kohler · REZX Series (Industrial Gaseous)

Kohler 200REZXB

200 kW standby / 176 kW prime · LPG · Liquid-cooled

200 kW LPG industrial standby generator. Enclosed gaseous standby with Doosan engine for commercial, healthcare, and institutional applications.

Kohler Kohler 200REZXB generator — specifications and details
Standby power
200 kW / 176 kW prime
Voltage options
120/208V, 277/480V
Frequency / Phase
60 Hz · 3-phase
Engine
Doosan D111TIC · 11.05L
Alternator
Kohler Brushless, Permanent-Magnet
CommercialHealthcareGovernmentindustrial-light
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Overview#

The Kohler 200REZXB is a 200-kilowatt LPG industrial standby generator in an enclosed configuration. Rated at 130-200 kW standby depending on voltage, it uses a Doosan engine paired with a brushless permanent-magnet alternator at 1800 RPM. This unit is EPA certified for both stationary emergency and non-emergency applications, with hurricane-rated enclosure options available.

Gaseous vs diesel at 200 kW#

At 200 kW, gaseous generators eliminate on-site fuel storage requirements and SPCC compliance. LPG provides clean combustion with lower emissions than diesel and avoids fuel degradation issues common with low-runtime standby diesel. The trade-off is dependence on propane delivery infrastructure during extended outages, and propane tank sizing must account for expected outage duration at this higher load level.

Our service experience#

PowerGen provides installation, maintenance, and emergency service for Kohler gaseous generators throughout Northern California. The Doosan engine platform in the REZX series is a robust industrial powerplant well-suited for continuous standby duty, and we structure PM programs around annual ignition, fuel system, and coolant inspections.

Engineering specifications

Physical

Length
140.7 in
Width
53.1 in
Height
75.1 in
Wet weight
6,000 lb

Fuel system & runtime

NG required pressure
7 in WC

Photos

Kohler 200REZXB — product photo

Documents & downloads

Spec sheets & manuals

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Service intervals

Manufacturer-recommended intervals for the Kohler 200REZXB under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter
Every 250 hours or 12 months
Coolant change
Every 3000 hours
Air filter
Every 500 hours
Spark plugs
Every 500 hours
Major overhaul
≈ 8,000 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, cylinder dropout codes, rough idle500+minor
Turbocharger sealsOil in intake, blue smoke, boost pressure loss10,000+moderate
Fuel pressure regulator / vaporizerHard starting, gas pressure fault, erratic idle8,000+moderate
Battery (starting)Slow crank, failed exercise8,760+minor

Frequently Asked Questions

What is the standby rating of the Kohler 200REZXB?
The 200REZXB is rated 130-200 kW standby (163-250 kVA) depending on voltage configuration, with prime ratings of 174-176 kW, operating on LPG at 60 Hz.
What fuel does the Kohler 200REZXB use?
The 200REZXB operates on LPG (propane). Natural gas and dual-fuel variants are also available in the REZX 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 REZX Series (Industrial Gaseous)

Kohler REZX enclosed gaseous gensets from 190 to 500 kW — LPG, natural gas, or dual-fuel with Doosan power.

View all 12models in this series →

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