Overview#
The Hipower HDI-1250 is a 1250 kW standby diesel generator powered by a Mitsubishi 12-cylinder turbocharged intercooled engine. Manufactured in Olathe, Kansas with NFPA 110 Level 1 certification and redundant starting.
Hipower Systems · HDI Series
Hipower HDI-1250
1250 kW standby · Diesel · Liquid-cooled
1250 kW standby diesel generator with Mitsubishi engine. Heavy-duty industrial large-frame series.
- Standby power
- 1250 kW
- Voltage options
- 277/480V
- Frequency / Phase
- 60 Hz · 3-phase
- Engine
- Mitsubishi Heavy Industries S12R-Y2PTAW-1
- EPA / Emissions
- Tier 2
- Alternator
- Stamford S7L1D
Engineering specifications
Acoustic
- Sound @ 7m, full load
- 81 dBA
- Enclosure
- Sound-attenuated
Fuel system & runtime
- Fuel use @ full load
- 97 GPH
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Estimated runtime
2.7 hours(0.1 days)
Fuel consumption ≈ 74.83 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 Hipower HDI-1250 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
- Oil & filter
- Every 500 hours
- Air filter
- Every 500 hours
- Fuel filter
- Every 500 hours
- Major overhaul
- ≈ 2,000 hours
Frequently Asked Questions
- What is the standby rating of the Hipower HDI-1250?
- The HDI-1250 is rated at 1250 kW standby at 277/480V, three-phase, 60 Hz. NFPA 110 Level 1 certified, it is engineered for Tier 3+ data centers, large hospitals, and industrial facilities requiring large-frame megawatt emergency power.
- What engine powers the Hipower HDI-1250?
- The HDI-1250 is powered by a Mitsubishi Heavy Industries S12R-Y2PTAW-1 12-cylinder turbocharged-aftercooled diesel engine with a Stamford S7L1D alternator. The S12R is the higher-displacement Mitsubishi large-frame platform, providing the torque and reliability needed at 1250 kW standby.
- What are the service intervals for the HDI-1250?
- Oil changes, air filter replacements, and fuel filter replacements are due every 500 hours. Major overhaul is at 2,000 hours, per Mitsubishi Heavy Industries S12R series published maintenance requirements.
- How does the HDI-1250 compare to Cat, Cummins, or Kohler at 1250 kW?
- The HDI-1250 competes with Cat C32 and Cummins QSK38 standby sets at the 1250 kW class, matching NFPA 110 L1, seismic, and 200 mph wind certifications at 15-25% lower list price. Mitsubishi's S12R engine is a globally respected industrial platform with strong parts availability.
- Is the HDI-1250 NFPA 110 Level 1 compliant?
- Yes. The HDI-1250 is NFPA 110 Level 1 certified with redundant starting systems, seismic rating, and 200 mph wind certification, qualifying it for the most demanding mission-critical standby applications.
- Who services Hipower HDI generators in Northern California?
- OnPoint Generators is an authorized Hipower dealer and service provider serving the Bay Area and Northern California. We offer HDI-1250 sales, commissioning, load bank testing, and preventive maintenance for large-frame installations.
More in the HDI Series
60 to 2,000 kW industrial diesel standby across FPT, Volvo, and Mitsubishi platforms — data-center spec at 15–25% below Big 4 pricing.
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