Kohler · REOZ Series (Diesel Industrial Large)

Kohler 2500REOZDB

2500 kW standby / 2250 kW prime · Diesel · Liquid-cooled

2500 kW diesel industrial standby generator powered by Detroit Diesel/MTU. DB-frame variant for data centers and mission-critical facilities.

Kohler Kohler 2500REOZDB generator — specifications and details
Standby power
2500 kW / 2250 kW prime
Voltage options
277/480V, 4160V, 12470V, 13200V, 13800V
Frequency / Phase
60 Hz · 3-phase
Engine
Detroit Diesel/MTU 20V4000G43 · 95.4L
EPA / Emissions
Tier 2
Alternator
Kohler
Data CentersHealthcareManufacturingGovernment
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Overview#

The Kohler 2500REOZDB is a 2500-kilowatt diesel industrial standby generator powered by a Detroit Diesel/MTU V16 engine at 1800 RPM. The DB suffix designates a specific alternator frame configuration, distinguishing this model from the 2500REOZDC variant. Both deliver 2.5 MW standby power. Medium-voltage options (4160V–13800V) are available.

Our service experience#

OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. Units in the 2.5 MW class require specialized service capabilities including medium-voltage expertise, MTU engine service, and large-capacity load bank testing.

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Estimate runtime for the Kohler 2500REOZDB

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

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Estimated runtime

1.5 hours(0.1 days)

Fuel consumption ≈ 135.00 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 2500REOZDB 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 2500REOZDB and 2500REOZDC?
Both use Detroit Diesel/MTU V16 engines at 2500 kW but differ in alternator frame size. The DB and DC designations indicate different alternator configurations for varying voltage and phase requirements.
What engine powers the Kohler 2500REOZDB?
The 2500REOZDB uses a Detroit Diesel/MTU V16 diesel engine running at 1800 RPM with Tier 2 emissions certification.
Does OnPoint service the Kohler 2500REOZDB?
Yes. OnPoint Generators provides maintenance, repair, and load bank testing for Kohler REOZ diesel generators throughout Northern California, including 2.5 MW class units.

Compatible equipment

Transfer switches

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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