Winco · DR Series

Winco DR45F4

45 kW standby / 40.5 kW prime · Diesel · Liquid-cooled

45 kW standby diesel generator with FPT engine and Stamford alternator. DR series enclosed. US-made.

Winco Winco DR45F4 generator — specifications and details
Standby power
45 kW / 40.5 kW prime
Voltage options
120/240V, 277/480V
Frequency / Phase
60 Hz · 1/3-phase
Engine
FPT Industrial N45 SM1 · 4.5L
EPA / Emissions
Tier 3
Commercial
Configure & QuoteDownload spec sheet

Overview#

The Winco DR45F4 is a 45 kW standby diesel generator powered by an FPT Industrial N45-family 4.5-liter turbocharged diesel engine with a Stamford alternator. Part of Winco's enclosed DR diesel standby series, it delivers both single-phase (120/240V) and three-phase (277/480V) output. EPA Tier III certified (standby). 100% US-made in Le Center, Minnesota since 1927.

The DR45F4 is a step up from the DR35F4 within the FPT-powered DR line. Its dual voltage/phase availability makes it versatile — a single unit covers both residential-scale and commercial three-phase loads.

The American Manufacturing Advantage#

Since 1927, Winco has built every generator at its Le Center, Minnesota facility. The DR45F4 reflects that heritage: US assembly, US labor, and two globally non-proprietary components at its core — an FPT Industrial diesel engine and a Stamford alternator.

For facilities subject to Buy American Act or Build America Buy America requirements — federal buildings, public schools, municipal utilities — the DR45F4 qualifies. The FPT engine is serviceable at any CNH Industrial (Case IH / New Holland) dealer or independent diesel shop. Stamford alternator parts are available from dozens of suppliers worldwide. No OEM lock-in, no proprietary parts programs.

Service & Maintenance#

Oil and fuel filter changes every 500 hours or annually. Standby diesel fuel degrades in storage — the annual interval applies even for generators that log minimal runtime. Air filter inspection at 500 hours. FPT N45-series engine consumables are available through CNH Industrial dealers and standard diesel parts suppliers.

Transfer switch contact maintenance is critical for standby reliability: weekly exercise cycling prevents the contact oxidation that causes failed or delayed transfers during actual outages. Major overhaul at 20,000 hours.

Our Service Experience#

PowerGen services Winco DR units across the Bay Area and Northern California. Because the DR45F4 uses FPT Industrial and Stamford components, parts procurement goes through standard channels — not a dedicated Winco distributor. This gives us the same service responsiveness on a Winco unit as on any other diesel standby generator. For public agencies, educational institutions, and commercial clients with US manufacturing requirements, the DR45F4 is a strong and practical choice.

Engineering specifications

Acoustic

Enclosure
Sound-attenuated

Documents & downloads

Spec sheets & manuals

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Configure your Winco DR45F4

Lock the enclosure, fuel system, transfer switch, and add-ons — we'll confirm pricing, availability, and lead time within one business day. Prefer a free-form quote? That option is still here.

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Estimate runtime for the Winco DR45F4

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

82.3 hours(3.4 days)

Fuel consumption ≈ 2.43 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 Winco DR45F4 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter
Every 500 hours or 12 months
Air filter
Every 500 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours

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.

ComponentSymptomTypical hoursSeverity
Fuel filterExtended standby fuel degradation — change annually regardless of hours500+minor
Starting batteryCapacity loss in standby — float charge, test annually4,380+minor
Transfer switch contactsOxidation on standby generators — exercise weekly to maintain contact quality8,760+minor

Frequently Asked Questions

What is the standby kW rating of the DR45F4?
The DR45F4 is rated at 45 kW standby. It is available in both single-phase (120/240V) and three-phase (277/480V) configurations.
What engine does the DR45F4 use?
The DR45F4 uses an FPT Industrial N45-family 4.5-liter four-cylinder turbocharged diesel engine from CNH Industrial. This engine family powers Case IH and New Holland agricultural equipment — parts and service expertise are widely available through CNH Industrial's global dealer network.
What makes Winco different from Generac or Kohler?
Winco generators use non-proprietary FPT Industrial engines and Stamford alternators — both globally supported components serviceable by any qualified diesel technician without OEM-specific tools. Winco has manufactured generators 100% in Le Center, Minnesota since 1927. Generac and Kohler offer proprietary engines, smart monitoring, and denser dealer networks but at the cost of component lock-in.
What emissions tier is the DR45F4?
The DR45F4 carries EPA Tier III certification for standby applications. The FPT N45 SM1 is a Tier III engine — standby generators in this output class carry Tier III certification under EPA standby exemption rules.
Where are Winco generators made?
Winco generators are 100% manufactured in Le Center, Minnesota. Founded in 1927 as Winpower, Winco is America's oldest generator manufacturer. Every unit is built, wired, and tested at the Le Center facility.
What are the service intervals for the DR45F4?
Oil and fuel filter changes every 500 hours or annually. Air filter inspection at 500 hours. Major overhaul at 20,000 hours. Transfer switch contacts should be exercised weekly to prevent contact oxidation during standby.
Who services Winco generators in Northern California?
PowerGen services Winco DR units throughout the Bay Area and Northern California. The FPT Industrial engine and Stamford alternator are non-proprietary, so our technicians source parts through standard diesel supply chains without dependence on a dedicated Winco dealer.

More in the DR Series

USA-made Tier 4 diesel standby in enclosed packages — 13 to 175 kW on FPT and Isuzu engines.

View all 9models in this series →

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