Kohler · REOZ Series (Diesel Industrial Large)

Kohler 800ROZMC

810 kW standby / 730 kW prime · Diesel · Liquid-cooled

800 kW diesel industrial standby generator powered by Mitsubishi. Open-frame variant of the 800REOZMD for indoor or custom-enclosed installations.

Standby power
810 kW / 730 kW prime
Voltage options
277/480V, 4160V, 12470V, 13200V, 13800V
Frequency / Phase
60 Hz · 3-phase
Engine
Mitsubishi S12A2-Y1PTA-1 · 33.93L
EPA / Emissions
Tier 2
Alternator
Kohler
Data CentersHealthcareManufacturingGovernment
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Overview#

The Kohler 800ROZMC is the open-frame variant of the 800REOZMD — an 810-kilowatt standby diesel generator powered by a Mitsubishi V12 engine at 1800 RPM. The ROZMC designation indicates no factory enclosure, making this unit ideal for indoor generator rooms or projects requiring custom enclosures. Medium-voltage options (4160V–13800V) are available.

Our service experience#

OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. Open-frame units in indoor installations require the same maintenance as enclosed variants, with the advantage of improved serviceability.

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Estimate runtime for the Kohler 800ROZMC

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

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Estimated runtime

4.6 hours(0.2 days)

Fuel consumption ≈ 43.74 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 800ROZMC 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 is the difference between the 800ROZMC and the 800REOZMD?
The 800ROZMC is the open-frame (no enclosure) variant of the 800REOZMD. Both share the same Mitsubishi engine and power ratings but the ROZMC ships without a factory enclosure, designed for indoor installations or custom enclosure projects.
What engine powers the Kohler 800ROZMC?
The 800ROZMC uses a Mitsubishi V12 diesel engine with 33.93L displacement running at 1800 RPM.
Does OnPoint service the Kohler 800ROZMC?
Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler REOZ diesel generators throughout Northern California.

Why we recommend Kohler

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.

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