How many kVA is 400kW?

400kW equals 500 kVA. The power factor is 0.8 in the 300-500kW range, therefore 300kW = 375 kVA, and 500kW = 625 kVA.
Generator ratings are measured in kVA, while loads are typically measured in kW. Selecting capacity in kVA ensures the generator delivers the maximum required power under normal operating conditions.
For mixed loads, the actual power factor of the equipment needs to be determined, as a lower power factor (e.g., 0.7) requires a larger kVA rating for the same kW of power.

What is the fuel consumption per hour of a 500 kVA diesel generator?

Typically, a 500 kVA (400 kW) diesel generator consumes approximately 100 liters of fuel per hour when operating at full load. However, actual consumption varies with load.
Standardized calculations show the following fuel consumption range: approximately 98-102 liters/hour at full load (400 kW), approximately 77-80 liters/hour at 75% load (300 kW), and approximately 56-60 liters/hour at 50% load (200 kW). Actual operating values ​​depend on engine brand, condition, and environmental conditions.

What size generator does a hospital need?

Hospitals typically require backup generators. For medium-sized hospitals, this usually means 300 kW to 500 kW generators, with the specific power output calculated based on the power consumption of life-saving equipment, intensive care unit (ICU) equipment, and critical equipment.
Hospitals usually specify an Emergency Backup Power (ESP) rating and require automatic transfer switches to restore power within seconds.
In our experience, a 400 kW (500 kVA) generator set is sufficient for many regional hospitals, while larger hospitals may run multiple generator sets in parallel.

How much does a 400kW diesel generator cost?

The price of a 400kW diesel generator is affected by the engine brand, generator, housing, and options. Key cost factors include engine brand, generator quality, control panel, housing type (open, silent, or containerized), and required certifications. Optional items such as automatic transfer switches (ATS), day fuel tanks, and parallel switch cabinets also increase the cost.
We will provide a written quotation based on your requirements, detailing the specific model, range, trade terms, and payment terms.

Can two 300kW generators be paralleled?

Yes, two 300kW generators can be connected in parallel, with a total power output of up to 600kW, provided that both units are equipped with suitable equipment and configured for parallel operation.
Parallel operation requires voltage and frequency matching between the two units, and also necessitates the addition of a load sharing controller to ensure that the load is shared proportionally between the two units.
The excitation systems of the alternators must also be compatible and have stable frequencies. Generally, using multiple identical generator sets simplifies the parallel connection process, while using a mix of different models of generator sets in parallel is not recommended.
The ELECPRIME 300kW (375kVA) generator set can be equipped with switchgear and a controller for parallel systems of two or more units.

What is the difference between prime power (PRP) and standby power (ESP) for a 400kW generator?

Prime power (PRP) refers to the rated power for continuous operation under varying load conditions, while standby power (ESP) refers to the maximum output power under varying load conditions; generators typically do not operate continuously.

For a 400kW generator, a unit with a 400kW PRP rating can operate continuously under that load, while a unit with a 400kW ESP rating is suitable for short-term standby and should not be used as a continuous primary power source.

Data centers and hospitals typically specify ESP as a backup power source, while construction sites, mines, and remote areas often require PRP for continuous power supply.

How loud is a 400kW silent diesel generator, and how much space does it need?

Our 400kW silent diesel generator set with a soundproof enclosure typically produces 75 decibels (dBA) at 7 meters, while open-type generator sets produce approximately 100-105 decibels (dBA). The soundproof enclosure utilizes high-quality sound insulation cotton, a scientifically designed exhaust recirculation system, and an industrial-grade muffler, achieving a super-quiet enclosure with a noise level as low as 65-70 decibels (dBA).
A soundproof enclosure generator set requires approximately 1.5 meters of space on both the intake and exhaust sides to maintain good ventilation. Space, typically around 1 meter, is needed on the maintenance door side for fuel connections and cable routing. If open-type generator sets is selected, the required space will be significantly reduced.

Should I choose a containerized or an open-frame 400kW diesel generator?

A containerized 400kW generator set is more suitable for outdoor, remote, or windy/sunny locations, while an open-frame generator set is better suited for a well-ventilated dedicated indoor machine room. Containerized units are weatherproof, have integrated sound insulation (typically 65-75 dB(A)), secure lockable doors, and built-in fuel tanks, making them easier to transport. Open-frame units are lighter, less expensive, and easier to maintain, but are noisier, around 100-105 dB(A), and are generally suitable for noise-insensitive applications.
ELECPRIME’s containerized generator sets are CSC certified and have all necessary documentation, ensuring safe transport and customs clearance.

What conditions are required for parallel operation of two diesel generators?

Generally, generator sets of the same brand and power rating provide the best stability when connected in parallel, and they must have the same voltage, frequency, and phase sequence. Each generator set also needs to be equipped with an AC generator, engine governor, and synchronization controller of the same frequency.
ELECPRIME’s load balancing system distributes the load proportionally according to the rated power of each generator set. We also provide a synchronization control cabinet and multiple controllers to support parallel operation of multiple generator sets.

Is a used or refurbished 400kW diesel generator worth it compared to a new one?

A used or refurbished 400kW generator can significantly reduce purchase costs, typically saving 50% or more compared to a new one. The price depends on the generator set’s operating time, the brand of the generator, and the control system. ELECPRIME offers both genuine used and refurbished used generators. Genuine used generators are usually unopened and unrepaired, while refurbished generators have most of their parts replaced. Both types undergo inspection and testing before leaving the factory.
Used or refurbished 400kW generator sets are typically used as backup power. If you require main power supply and continuous power supply, we recommend purchasing a brand new generator set.

What warranty do you offer on a 300-500kW diesel generator?

ELECPRIME’s new 300-500kW diesel generators come with a 1-year or 1500-hour warranty, whichever comes first. The warranty covers failures caused by defects in materials and workmanship under normal use. A well-maintained generator set has an engine overhaul life of over 40,000 hours. The generator set must be installed, commissioned, and regularly maintained according to the manual’s specifications and operated within its rated power range. Damage caused by consumables, misuse, use of incorrect fuel, or unauthorized modifications is not covered under warranty.
ELECPRIME provides spare parts and technical guidance, as well as after-sales service.

Which shipping term should I choose for a 400kW diesel generator: FOB, CIF, or DDP?

FOB is suitable for buyers who arrange their own freight; CIF is more convenient if you want the seller to be responsible for ocean freight and insurance until the goods arrive at your port; while DDP provides door-to-door delivery and pre-paid customs duties. Under FOB terms, our responsibility ends after the goods are loaded onto the ship at a Chinese port, and the buyer is responsible for freight and insurance. CIF terms extend our responsibility to the port of destination, while DDP covers the entire door-to-door transport chain, including import clearance and customs duties in the destination country.
We also offer EXW and DAP terms. The 400kW unit can be shipped in containers or in bulk; different trade terms will affect packaging, documentation, and costs. Choosing FOB gives you maximum control, choosing CIF provides a single-price port delivery, and choosing DDP offers the most convenient door-to-door delivery service.

What is the minimum order quantity for OEM or ODM diesel generators?

ELECPRIME supports one OEM or ODM generator set in the 300-500 kW power range. For simple OEM work, such as adding your logo, colors, and nameplate, there is usually no additional charge; however, complete ODM development, such as new control panels, enclosures, or power ratings, will incur additional costs depending on the customization.
Customization includes enclosure design, control systems, voltage and frequency, etc.

Which certifications and customs documents come with a 400kW diesel generator?

ELECPRIME diesel generator sets can provide ISO9001, ISO8528, ISO3046, ISO14000, CE, CQC, CSC (Containerized Systems), and CCS (Classification Society of Shipping) certifications. For customs clearance, we provide commercial invoices, packing lists, bills of lading, and certificates of origin, and can issue other documents such as RETIE, COC, or COA according to the requirements of the destination country. ISO8528 and ISO3046 cover generator set performance and engine testing standards; CE certification supports access to multiple markets; containerized generator sets can obtain CSC transport certification; and marine generator sets can obtain CCS (Classification Society of Shipping) certification.
We will prepare export documents according to the agreed trade terms and destination to avoid problems.

How much power does a diesel generator lose at high altitude or high temperature?

Diesel generators experience a decrease in power output at high altitudes and in high temperatures because the thinner air reduces combustion air and cooling capacity. Above 1000 meters, power output decreases by approximately 8% for every 1000 meters of altitude gain. Above 40 degrees Celsius, power output decreases by approximately 5% for every 5 degrees Celsius increase in ambient temperature, but the exact figures depend on the engine’s derating curve.
A 400 kW generator set operating at an altitude of 2000 meters may see its maximum output power drop to approximately 350 kW. High temperatures also reduce the power output of both the generator and engine.
For locations above 1000 meters in altitude or temperatures above 40 degrees Celsius, we recommend selecting a higher-power generator set.

How often should a 400kW diesel generator be serviced?

A 400kW diesel generator typically requires routine maintenance every 250-500 hours of operation or every 6-12 months, whichever comes first. Maintenance includes: daily checks of engine oil, coolant, and fuel; the first maintenance after 50 hours; oil and filter changes every 250-500 hours; and a major overhaul every 2000-4000 hours, depending on the engine model. Even standby generators, which are not used frequently, require annual maintenance and monthly load testing to ensure the battery, fuel system, and alternator are in good working order. A proper maintenance schedule can ensure an engine overhaul life exceeding 40,000 hours and keep the warranty valid. ELECPRIME can provide maintenance kits, filters, and spare parts.

Do I need an automatic transfer switch (ATS) with my diesel generator?

An ATS is necessary when your 300-500 kW generator needs to automatically start and take over the load during a power outage. This is standard equipment in hospitals, data centers, and most backup power applications.
After a power outage, the ATS signals to start the generator, confirms voltage and frequency stability, switches the load to the generator set, and switches back to mains power once mains power is restored. Without an ATS, someone must start the generator set and manually operate the transfer switch, which is too slow for critical loads. For a 400 kW generator set, the ATS’s rated current must be able to withstand full-load current and must be matched to the generator’s output and grounding system.

Can a 400kW diesel generator run at both 50Hz and 60Hz?

400kW diesel generator is designed for a specific frequency and engine speed. The generator operates at 1500 rpm at 50Hz and 1800 rpm at 60Hz. The generator set cannot simply switch between the two frequencies because the alternator windings, engine governor settings, and control system are configured for a specific frequency. To provide 60Hz power, the generator is ordered and tested at 60Hz at the factory; to provide 50Hz power, it needs to be configured for 50Hz. If you need both frequencies, you can add a frequency converter to solve this problem.

How long does it take to manufacture and ship a 300-500kW diesel generator?

ELECPRIME standard generator sets typically have a delivery time of 7 days, depending on your chosen configuration (open rack, soundproof enclosure, containerized, or parallel switchgear), required certifications, and the port of destination. Engine lead time is usually the main factor determining the delivery schedule, therefore the engine brand you choose is a key variable. Our standard generator sets do not include all engine brands; if you specify an engine brand that we do not have in stock, the delivery time will need to be recalculated.