Heavy-Duty 320kW Power – Engineered for Commercial Building Applications

When the grid goes down and your commercial building can’t afford a moment of downtime, you need a generator that delivers serious power with unwavering reliability. The EMEAN EM-W440 provides a solid 320kW (400kVA) of prime power, backed by a 350kW WEICHAI WP13D385E200 turbocharged and aftercooled diesel engine. With a wide voltage range from 110V to 660V and single or three-phase configurations available, this generator adapts to your specific electrical needs. Whether you’re protecting an office tower, a shopping mall, a hospital, or a mixed-use facility, this is the generator for commercial building solution that keeps your critical systems running when you need them most.

The EM-W440 is more than just another generator for commercial building—it is a purpose-built power system engineered to withstand the demands of commercial environments. With a standby rating of 352kW (440kVA), this unit provides ample headroom for starting HVAC systems, elevators, and other high-inrush equipment. The generator operates at 1500 RPM (50Hz) with a fuel consumption of just 197.0 g/kW.h, making it a cost-effective generator for commercial building choice for extended backup power.

Powered by WEICHAI – The 12.54L Straight-Six Workhorse

At the heart of this generator for commercial building lies the WEICHAI WP13D385E200, a 6-cylinder, 12.54-liter turbocharged and aftercooled diesel engine with an inline configuration. With a bore and stroke of 127×165 mm and a compression ratio of 16:1, this large-displacement platform delivers exceptional torque and thermal efficiency. The engine achieves a mean effective pressure of 2.456 MPa and a mean piston speed of 8.25 m/s—a well-balanced figure that promotes long engine life while delivering robust power for demanding commercial applications.

The engine features a mechanical fuel pump system and draws 1,573 kg/h of air at rated conditions, ensuring complete combustion and reduced emissions. The intercooling system is particularly impressive: at rated conditions, the intercooler reduces intake air temperature from 172.0°C down to just 50.7°C, with a maximum pressure drop of only 12 kPa. This efficient charge-air cooling enables higher power output, cleaner combustion, and more stable operation.

What truly sets this engine apart for generator for commercial building applications is its remarkable oil consumption ratio of just 0.2% of fuel consumption—significantly lower than the industry average. With an oil capacity of 36L, the EM-W440 is designed for extended service intervals that minimize downtime. The engine maintains oil pressure between 350–550 kPa at rated speed, with low-pressure protection at 80 kPa to safeguard the engine from damage.

Engineered for Quiet, Efficient Operation

The EM-W440 features a soundproof canopy lined with sound-reducing foam, making it a generator for commercial building that respects both urban and suburban environments. The industrial silencer and modular ventilation design further reduce noise levels, while the all-metal canopy parts are powder-coated for durability and corrosion resistance. With a noise level of just 117 dB(A) (acoustic power level)—remarkably low for a 320kW diesel unit—the EM-W440 delivers the kind of neighborhood-friendly operation that makes it an ideal choice for commercial installations in densely populated areas.

The engine’s thermal management is equally impressive. The closed-loop water cooling system is rated for operation up to 50°C ambient temperature, with a thermostat that begins opening at 76°C and reaches full opening at 88°C. Coolant flow is 19.8 m³/h, and the system holds 25L of coolant. At rated conditions, the cooling system removes 127.8 kJ/s of heat while the exhaust carries away 234.3 kJ/s, with total engine heat output of 785.0 kJ/s—ensuring stable operating temperatures even during extended run times.

Built to Start in the Toughest Conditions

A generator for commercial building is only as good as its ability to start when you need it most. The WP13D385E200 starts reliably down to -10°C without auxiliary starting devices, and with a preheater, it operates confidently down to -30°C. This exceptional cold-start capability makes the EM-W440 a practical choice for installations across North America and Europe, where winter storms can knock out the power grid for days.

The 24V starting circuit is engineered with robust components: an 8.5kW starter motor and 70A battery charging alternator provide ample starting power that you can count on every time. When a winter storm hits, this generator for commercial building delivers the reliable starting performance you need to keep your facility running.