Used Denyo DCA-500SPK 500kVA (400kW) Silent Diesel Generator – Warehouse Stock, Pre-Owned & Load Tested

Used Denyo DCA-500SPK 500kVA (400kW) Silent Diesel Generator – Warehouse Stock, Pre-Owned, Serviced, Ready for Immediate Dispatch

This listing is for a used Denyo DCA-500SPK silent diesel generator, a high-capacity unit from Japan’s premier generator manufacturer. The DCA-500SPK is part of Denyo’s heavy-duty DCA series, engineered for demanding industrial applications requiring substantial power output combined with quiet operation . This generator is currently available from our warehouse stock, has been thoroughly inspected, professionally serviced, and load tested to ensure reliable performance – ready for immediate delivery .

Why Choose a Pre-Owned Denyo Generator?
Denyo generators are built to last, with robust construction and premium components designed for extended service life . Denyo holds the top market share in Japan (70%) and is used in over 150 countries worldwide, offering excellent performance and ruggedness unique to Japanese products . This used unit delivers the same Japanese engineering excellence at a significantly reduced price—ideal for contractors, mining companies, industrial facilities, and event producers looking to acquire high-capacity reliable power with immediate availability from stock .

Warehouse Stock – Ready to Go
This unit is physically available in our warehouse and can be inspected upon request. No waiting for manufacturing or shipping from overseas – simply inspect, purchase, and deploy to your site .

Heavy-Duty Sound-Attenuated Canopy
Denyo’s DCA Series generators run quietly thanks to the company’s advanced soundproofing technology . This model features a fully enclosed, soundproof canopy with a sturdy weatherproof steel bonnet on a heavy-duty skid base, ensuring durability and easy handling by forklifts . With noise levels of approximately 68 dB(A) at 7 meters (50Hz) / 71 dB(A) at 7 meters (60Hz), it is suitable for noise-sensitive environments including urban construction sites, residential areas, hospitals, and overnight events . The weather-resistant enclosure protects internal components from dust, rain, and harsh site conditions .

Power Output & Engine
The DCA-500SPK delivers 500 kVA (400 kW) of robust power at 60Hz (450 kVA / 360 kW at 50Hz), with 3-phase, 4-wire output . It is powered by a heavy-duty Komatsu SA6D170-B diesel engine – a 6-cylinder, 23.15L displacement, turbocharged and aftercooled industrial engine known for exceptional reliability and fuel efficiency in demanding applications .

Large Fuel Capacity for Extended Runtime
Equipped with a massive 490-liter self-contained fuel tank, this generator is designed for continuous operation without frequent refueling – ideal for remote sites and extended projects .

Advanced Features

• Dual Voltage System: For companies that operate internationally or have equipment requiring different voltages, the DCA Series generators are equipped with a dual voltage system, so a single generator can be used to power equipment at multiple voltage settings . Selectable 190–220V/380–440V (50Hz) or 190–240V/380–480V (60Hz) .

• Parallel Operation Capability: Built-in parallel operation drive system allows creating larger capacity power plants on-site without additional equipment .

• High-Performance Generating System: With an innovative excitation system integrated with an Automatic Voltage Regulator (AVR) and advanced brushless generator, it provides fast voltage regulation within ±0.5% in response to load variations .

• Protection Features: Circuit breaker for overload and short circuit protection, Earth Leakage Relay to prevent electric shock, and emergency stop device with warning lamps for automatic engine fault detection .

• User-Friendly Design: All daily maintenance tasks can be performed from one side of the machine, with large access doors for engine servicing . External drain plugs for oil, fuel, and water simplify routine maintenance .

Condition & Testing

• Condition: Used, with visible signs of prior use (scratches, paint wear) consistent with working industrial equipment

• Warehouse Location: Available for inspection – contact us to arrange a viewing

• Service History: Oil and filter changed, air filter cleaned/replaced, coolant and fuel levels checked

• Tested: Unit has been load tested and operates smoothly, producing stable voltage and frequency

• Hour Meter: Please contact for current hours and specific unit details

• Warranty: Basic warranty included (inquire for details)

Key Specifications:

Typical Applications:

• Large-scale construction sites and infrastructure projects

• Mining and quarry operations

• Industrial facilities and manufacturing plants

• Data centers and mission-critical facilities

• Hospitals and healthcare facilities (emergency backup)

• Large outdoor events, concerts, and festivals

• Remote job sites and temporary power needs

• Oil & gas and heavy industrial applications

Why Buy from Us?

• Immediate Availability: Warehouse stock – no waiting for manufacturing or international shipping

• Inspection Welcome: View the unit in person before purchase

• Professionally Serviced: Fully checked and serviced by experienced technicians

• Competitive Pricing: Significant savings compared to new equipment

• Technical Support: Our team can assist with installation and commissioning