2500 kW EPA Tier 4 Final diesel industrial standby generator. Dual-certified (emergency and non-emergency) for mission-critical and prime power applications.
The Kohler KD2500-4 is a 2500-kilowatt EPA Tier 4 Final diesel industrial generator from Kohler's KD Series platform. The -4 designation indicates Tier 4 Final emissions compliance with dual certification for both emergency standby and non-emergency (prime power) applications. At 2.5 MW, it serves large data centers, hospital systems, and industrial facilities where air quality regulations or continuous duty requirements demand Tier 4 compliance. The KD Series uses Kohler-designed engines and permanent-magnet pilot exciter alternators.
The KD Series is Kohler's large industrial diesel generator line, covering 800 to 4000 kW. Designed for mission-critical facilities, every KD Series unit carries UL 2200 listing and meets NFPA 110 Level 1 requirements when equipped with the necessary accessories. Sound aluminum enclosures with 186 mph wind load ratings are available across the larger KD platform.
OnPoint Generators provides installation, maintenance, and emergency service for Kohler KD Series generators throughout Northern California. Tier 4 Final units require additional aftertreatment system maintenance, including DEF management and DPF regeneration monitoring, which our technicians handle as part of comprehensive PM programs.
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.
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
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 KD2500-4 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
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
DPF (Diesel Particulate Filter)
Regen warning, back-pressure fault, power derate
4,380+
moderate
DEF system (SCR catalyst)
Derate warning, NOx fault, DEF quality alert
4,380+
moderate
Fuel quality / degradation
Injector fouling, hard starting, black smoke under load
4,380+
moderate
Turbocharger
Power loss, excessive exhaust smoke, oil at turbo seals
15,000+
moderate
Cooling system (hoses / thermostat)
Overtemperature fault, coolant loss, high EGT
10,000+
moderate
Battery (starting)
Slow crank, failed exercise, low voltage alarm
8,760+
minor
Frequently Asked Questions
What is the standby rating of the Kohler KD2500-4?
Per the Kohler spec sheet, the KD2500-4 is rated at 2500 kW / 3125 kVA standby and 2270 kW / 2837 kVA prime continuous at 0.8 power factor, 60 Hz, 1800 RPM.
Is the Kohler KD2500-4 EPA Tier 4 certified?
Yes. The KD2500-4 is EPA Tier 4 Final certified with dual certification for both stationary emergency and stationary non-emergency applications, making it suitable for prime power duty where air quality regulations require Tier 4 compliance.
What alternator type does the KD2500-4 use?
The KD2500-4 uses a brushless, permanent-magnet pilot exciter alternator — Kohler's standard for the KD Series large industrial diesel platform.
Similar models
Kohler
New
Kohler 2500REOZDC
2.5 MW standby · Diesel · Liquid-cooled
2500 kW diesel industrial generator powered by Detroit Diesel/MTU. Mission-critical standby for data centers, hospitals, and large commercial facilities.
Tier 23-phasedata-centerhealthcare
Kohler
New
Kohler KD2500
2.5 MW standby · Diesel · Liquid-cooled
2500 kW diesel industrial standby generator. KD Series platform for data centers, healthcare, and heavy industrial facilities requiring 2+ MW backup.
Tier 23-phasedata-centerhealthcare
Kohler
New
Kohler KD2250
2.3 MW standby · Diesel · Liquid-cooled
2250 kW diesel industrial standby generator. KD Series platform for data centers, healthcare, and mission-critical facilities approaching 2 MW.
Tier 23-phasedata-centerhealthcare
Kohler
New
Kohler KD2800
2.8 MW standby · Diesel · Liquid-cooled
2800 kW diesel industrial standby generator. Upper-range KD Series platform for data centers, healthcare, and mission-critical infrastructure.
Tier 23-phasedata-centerhealthcare
Kohler
New
Kohler 2000REOZMD
2 MW standby · Diesel · Liquid-cooled
2000 kW diesel industrial generator powered by Mitsubishi. Mission-critical standby for data centers, hospitals, and large commercial facilities.
Tier 23-phasedata-centerhealthcare
Kohler
New
Kohler KD2000
2 MW standby · Diesel · Liquid-cooled
2000 kW diesel industrial standby generator. KD Series platform for data centers, healthcare, and mission-critical infrastructure requiring multi-megawatt backup.
Tier 23-phasedata-centerhealthcare
Need service or parts for the Kohler KD2500-4?
We service every major OEM and stock genuine parts for the most common models.
