The Kohler 150REZGC is a 150-kilowatt LPG industrial standby generator in an enclosed configuration. Rated at 106-150 kW standby depending on voltage, it uses a PSI (Power Solutions International) engine paired with a brushless rare-earth permanent-magnet alternator at 1800 RPM. This unit is EPA certified for stationary emergency applications and targets mid-range commercial facilities, healthcare, and education campuses.
At 150 kW, gaseous generators eliminate on-site fuel storage and SPCC compliance. Propane provides clean combustion with lower emissions than diesel, and there is no fuel degradation concern during low-runtime standby service. However, propane supply must be sized for the expected outage duration, and delivery logistics become a factor during regional emergencies.
OnPoint Generators provides installation, maintenance, and emergency service for Kohler gaseous generators throughout Northern California. The PSI engine platform in the larger RZG units delivers strong performance in the 100-150 kW class, and we structure PM programs around annual ignition, fuel system, and coolant inspections.
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Manufacturer-recommended intervals for the Kohler 150REZGC 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.
Component
Symptom
Typical hours
Severity
Spark plugs / ignition
Misfire under load, cylinder dropout codes, rough idle
500+
minor
Turbocharger seals
Oil in intake, blue smoke, boost pressure loss
10,000+
moderate
Fuel pressure regulator / vaporizer
Hard starting, gas pressure fault, erratic idle
8,000+
moderate
Battery (starting)
Slow crank, failed exercise
8,760+
minor
Frequently Asked Questions
What is the standby rating of the Kohler 150REZGC?
The 150REZGC is rated 106-150 kW standby (106-188 kVA) depending on voltage configuration, operating on LPG at 60 Hz.
What fuel does the Kohler 150REZGC use?
The 150REZGC 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.
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Kohler 150RZGC
150 kW standby · LPG · Liquid-cooled
135 kW LPG industrial standby generator. Open-frame gaseous standby with PSI engine for commercial and industrial facilities.
