The Kohler 900REOZMD is a 900-kilowatt standby (825 kW prime) diesel generator powered by a Mitsubishi S12H-Y2PTAW-1 V12 engine at 1800 RPM. This industrial-class unit serves mission-critical standby applications including data centers, hospitals, and large commercial facilities. Medium-voltage options (4160V–13800V) are available.
OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. Units in this class require specialized service capabilities including large-capacity load bank testing and Mitsubishi engine expertise.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
4.1 hours(0.2 days)
Fuel consumption ≈ 48.60 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Service intervals
Manufacturer-recommended intervals for the Kohler 900REOZMD under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Coolant change
Every 6000 hours
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Load bank test
Every 12 months
Frequently Asked Questions
What engine powers the Kohler 900REOZMD?
The 900REOZMD uses a Mitsubishi S12H-Y2PTAW-1 V12 diesel engine running at 1800 RPM with Tier 2 emissions certification.
What is the standby power rating of the 900REOZMD?
The 900REOZMD is rated at 900 kW standby and 825 kW prime per Kohler published specifications.
How does the 900REOZMD compare to the Kohler KD900?
Both deliver 900 kW standby but use different engines: the REOZMD uses a Mitsubishi S12H while the KD900 uses a Kohler KD27V12. The KD Series offers Kohler's own engine with PM pilot exciter; the REOZ offers a proven Mitsubishi platform.
Kohler is our primary recommendation for commercial standby power. We sell and service the full Kohler line — RCA residential, RCL light commercial, KG industrial diesel, and REOZ large-frame — and our technicians are factory-trained on every product family.
We are an authorized Kohler dealer with factory-trained technicians. Kohler is the majority of our new generator sales today, spanning residential through large industrial. Our parts inventory is stocked for same-day Kohler service.
