The Kohler 150RZGC is a 135-kilowatt LPG industrial standby generator in an open-frame (skid-mounted) configuration. Rated at 91-135 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. The open-frame design is intended for indoor mechanical rooms or buildings with dedicated generator enclosures.
At this capacity, gaseous generators eliminate on-site fuel storage requirements and SPCC compliance obligations. Propane provides clean combustion with lower emissions than diesel, and there is no fuel degradation concern during low-runtime standby duty. 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 is a proven industrial gaseous engine with strong service support, 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 150RZGC 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 150RZGC?
The 150RZGC is rated 91-135 kW standby (91-169 kVA) depending on voltage configuration, operating on LPG at 60 Hz.
What fuel does the Kohler 150RZGC use?
The 150RZGC 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 150REZGC
150 kW standby · LPG · Liquid-cooled
150 kW LPG industrial standby generator. Enclosed gaseous standby with PSI engine for mid-range commercial and institutional applications.
