Nanni Generator Type Q2400 – 20CM50

Description

New Nanni Generator Type Q2400 – 20CM50 Marine Generator For Sale

Reliable 19.9 kW Single-Phase Power for Yachts and Professional Vessels

The New Nanni Generator Type Q2400 – 20CM50 Marine Generator is a dependable marine diesel generator engineered to provide stable onboard electricity for motor yachts, sailing yachts, catamarans, expedition vessels, workboats, and professional marine applications. Built around a proven Kubota diesel engine and paired with a Mecc Alte alternator, the Q2400 – 20CM50 combines efficient operation, substantial electrical capacity, and purpose-built marine engineering.

Designed for vessels using a 230V single-phase electrical system, the generator delivers 19 kW of prime running power and up to 19.9 kW of limited-time power at 50 Hz. This output allows it to support multiple onboard systems, including air conditioning, refrigeration, battery chargers, water makers, pumps, navigation electronics, communication equipment, galley appliances, lighting, and entertainment systems.

Choosing the correct marine generator involves more than matching a vessel with a maximum kilowatt figure. The continuous electrical load, motor-starting demand, available machinery space, ventilation, cooling requirements, exhaust routing, operating hours, and potential future upgrades should all be considered before purchase.

For customers seeking a capable marine genset with low-speed diesel operation and strong single-phase output, the Nanni Q2400 – 20CM50 provides a practical onboard power solution for recreational and commercial vessels.

Marine Engineering Behind the Nanni Q2400 – 20CM50

Nanni has been producing marine engines and power systems since 1952. Its generator sets are developed specifically for marine applications, and the company supports its products through an international network of distributors and service partners. Nanni’s production facility and design office are certified to ISO 9001 standards.

The Q2400 platform uses a Kubota-based, four-cylinder, four-stroke diesel engine with a displacement of approximately 2.434 litres. Its cast-iron block, indirect mechanical fuel injection, automatic preheating system, and electronic speed governor are designed to support dependable starting, consistent engine speed, and durable operation.

Unlike a general-purpose industrial unit adapted for installation aboard a boat, the Nanni Q2400 marine generator is supplied with dedicated marine systems. These include heat-exchanger cooling, a freshwater-cooled exhaust manifold, a wet-exhaust arrangement, a raw-water pump, generator safeguards, and a digital control panel.

Customers evaluating the Nanni Generator Type Q2400 – 20CM50 price should consider its complete operating value, including electrical capacity, fuel efficiency, marine durability, installation configuration, service accessibility, warranty support, and suitability for the vessel’s power-distribution system.

Efficient Kubota Diesel Performance

The Q2400 – 20CM50 uses a naturally aspirated Kubota-based engine designed to deliver consistent power at a controlled operating speed. Its four-cylinder configuration provides the capacity required for higher electrical demand while retaining a straightforward mechanical fuel-injection system.

The generator operates at 1500 RPM, the standard speed used to produce 50 Hz power with a four-pole alternator. This low-speed design helps reduce mechanical wear, vibration, and operating noise compared with higher-speed generator systems.

The Q2400 – 20CM50 is designed to provide:

• Reliable power for essential vessel systems
• Efficient operation under sustained electrical loads
• Electronic speed regulation
• Practical routine maintenance access
• Reduced vibration through low-speed operation
• Dependable auxiliary electricity away from shore power

A properly sized diesel marine generator allows yacht owners and vessel operators to run onboard equipment without relying on marina electricity or operating the main propulsion engines solely for battery charging.

Prime and Limited-Time Power Ratings

Understanding the difference between prime and limited-time output is important when selecting an onboard generator.

The Nanni Q2400 – 20CM50 provides 19 kW of prime running power, which is the more relevant rating for sustained vessel operation. Its 19.9 kW limited-time rating provides additional capacity for shorter periods.

A vessel’s calculated continuous load should normally remain below the prime rating, leaving appropriate reserve for motor starts, battery-charging changes, and temporary demand increases. Pumps, compressors, refrigeration systems, and air-conditioning equipment can require significantly more electricity during startup than during normal operation.

Selecting a generator that is too small can cause overloads, voltage instability, and premature wear. However, installing a unit that is much larger than necessary may lead to prolonged operation under very light loads. A professional load assessment helps establish the correct balance between capacity, efficiency, and operating reserve.

Stable 230V Single-Phase Electrical Output

The Q2400 – 20CM50 is designed for vessels using 230V single-phase marine power. Its Mecc Alte alternator uses a four-pole configuration with Class H insulation, IP23 protection, and voltage regulation specified at approximately ±1%.

These features support dependable electricity for compatible onboard systems such as:

• Marine air-conditioning equipment
• Navigation and monitoring electronics
• Refrigeration and freezer systems
• Battery chargers and inverter chargers
• Water makers
• Freshwater and seawater pumps
• Galley appliances
• Lighting circuits
• Communication equipment
• Entertainment systems

Modern vessels rely on sensitive electrical equipment for navigation, safety, communication, and comfort. Stable engine speed and alternator regulation therefore play an important role in maintaining consistent voltage and frequency as onboard demand changes.

The published current rating in Nanni’s official Q2400 datasheet is approximately 71.3 amps at 230V. Final cable sizes, circuit protection, grounding, and distribution arrangements should be determined by a qualified marine electrician in accordance with the vessel’s electrical design and applicable regulations.

SI-2 Digital Generator Control

The Nanni Q2400 series is equipped with the SI-2 digital control panel. This system allows operators to start and stop the generator, monitor engine and alternator parameters, view operating status, and access alerts and fault codes.

The SI-2 panel includes:

• Start and stop controls
• Illustrated multilingual menus
• Engine-parameter display
• Generator-parameter display
• Operating-status indication
• Alerts and diagnostic fault codes
• An operating history log with up to 150 records

These monitoring functions help operators identify abnormal conditions and respond before a minor issue becomes a more serious operational problem.

A digital control system does not replace regular inspection and preventive maintenance, but it provides useful information for everyday operation and troubleshooting.

Marine Cooling for Sustained Operation

Reliable temperature control is essential for any marine generator set. Unlike land-based equipment operating in open surroundings, onboard generators are normally installed inside enclosed machinery compartments where heat must be removed efficiently.

The Q2400 uses a belt-driven centrifugal coolant pump, a freshwater-cooled exhaust manifold, and a bronze seawater pump with a neoprene impeller. The official datasheet lists raw-water flow at approximately 40 litres per minute for the 50 Hz configuration.

Its marine generator cooling system supports:

• Stable engine operating temperature
• Efficient transfer of heat to the seawater circuit
• Protection of internal engine components
• Reliable performance under sustained loads
• Reduced thermal stress
• Longer operating life

Routine inspection should include coolant condition, seawater flow, raw-water strainers, hoses, clamps, belts, impellers, heat-exchanger surfaces, and wet-exhaust components.

Restricted water flow, a damaged impeller, blocked heat-exchange passages, or poor engine-room ventilation can lead to overheating even when the generator itself is correctly sized.

Compact Installation and Service Access

Although the Q2400 – 20CM50 provides almost 20 kW of electrical output, it remains packaged for marine installation. The official Q2400 datasheet lists dimensions of approximately 1200 × 540 × 650 mm without a soundshield and 1300 × 600 × 700 mm with the enclosure. Published weight is approximately 405 kg without the enclosure and 450 kg with it.

Nanni’s current online product page lists the enclosed configuration at 1300 × 600 × 700 mm but gives a higher published weight. Because documentation can vary by production revision or configuration, final dimensions and lifting weight should be confirmed on the quotation and approved technical drawing before installation.

The generator may be considered for:

• New motor-yacht construction
• Sailing yacht and catamaran installations
• Expedition-vessel power systems
• Commercial vessel installations
• Yacht refit projects
• Electrical-system upgrades
• Marine generator replacement

When replacing an existing boat generator, matching only the rated output is not sufficient. The installer should also confirm mounting points, service clearances, ventilation, seawater connections, exhaust back pressure, fuel supply, cable routing, and access for future removal.

Soundshield and Soundless Configurations

Noise and vibration are major considerations aboard yachts, liveaboard vessels, and passenger craft. A generator may be mechanically reliable yet still create an unpleasant onboard environment if acoustic control and installation quality are poor.

Nanni offers the Q2400 – 20CM50 in soundshield, unenclosed, and Soundless configurations. The 1500 RPM operating speed also helps reduce mechanical noise and vibration.

Nanni has documented the use of two Q2400 – 20CM50 Soundless generators in a Sanlorenzo yacht refit, reporting a noise reduction of up to 10 dB compared with conventional market solutions in that specific project. Results on other vessels will depend on compartment construction, exhaust routing, mounting, ventilation, and installation quality.

A correctly installed quiet marine generator should include:

• Suitable flexible mounts
• Proper machinery-space ventilation
• Correct hose and cable support
• An engineered wet-exhaust system
• Appropriate sound insulation
• Adequate service clearance

The enclosure alone does not determine the final onboard sound level. Vibration transfer through the hull and the design of ventilation openings can also significantly affect acoustic performance.

Applications of the Nanni Q2400 – 20CM50

The electrical capacity and marine configuration of the Q2400 – 20CM50 make it suitable for several vessel types.

Motor Yachts

The generator can provide dependable power for air conditioning, refrigeration, battery chargers, galley equipment, pumps, entertainment systems, lighting, and guest-comfort equipment.

Sailing Yachts and Expedition Catamarans

Larger cruising yachts and catamarans can use the generator as an auxiliary marine power system for water makers, navigation electronics, refrigeration, communications, battery charging, and essential domestic loads.

Long-Range Cruising Vessels

Its 19 kW prime rating makes the unit suitable for vessels requiring dependable electricity during extended periods away from marina facilities.

Commercial and Professional Craft

The Q2400 – 20CM50 can serve as a reliable commercial marine generator for communication systems, pumps, refrigeration, lighting, workshop equipment, and auxiliary machinery.

Marine Refit Projects

The unit can be considered when replacing an ageing or inefficient generator, provided the electrical output, dimensions, cooling, exhaust, and supporting systems are compatible with the vessel.

Technical Specifications of the Nanni Q2400 – 20CM50

Specifications are based on Nanni’s official Q2400 datasheet. Final ratings, dimensions, weight, and equipment should be confirmed before ordering because production specifications may change.

Standard Equipment and Available Options

The Nanni Q2400 – 20CM50 is supplied as an integrated marine diesel generator set.

Standard equipment includes:

• Four-cylinder Kubota-based diesel engine
• Mecc Alte single-phase alternator
• SI-2 digital control panel
• 12V unipolar electrical system
• Marine heat exchanger
• Wet-exhaust arrangement
• Raw-water pump with neoprene impeller
• Automatic engine preheating
• Protection of essential operating parameters

Available options include:

• Soundshield enclosure
• Soundless configuration
• Siphon breaker
• Fuel pre-filter
• Bipolar electrical system
• 24V electrical system

The exact package should be confirmed when ordering to ensure that the generator is supplied with the equipment required for the intended vessel and installation.

Genuine Nanni Generator Supply and Worldwide Support

Customers looking for the New Nanni Generator Type Q2400 – 20CM50 Marine Generator for sale can contact our marine specialists for current availability, technical guidance, configuration options, and international delivery assistance.

We support customers with:

• Genuine Nanni generator supply
• Electrical-load and sizing guidance
• Technical product recommendations
• Replacement generator assessment
• Marine application support
• Export documentation
• Worldwide shipping arrangements
• After-sales assistance

Correct installation and maintenance are important for warranty protection. Nanni’s documentation states that installation and servicing should follow manufacturer requirements and that unauthorized modifications or non-genuine parts may affect warranty coverage.

Frequently Asked Questions

What is the Nanni Q2400 – 20CM50 price?

The Nanni Generator Type Q2400 – 20CM50 price depends on the selected enclosure, optional equipment, current availability, shipping destination, and delivery requirements. Contact our team for a current quotation.

How much continuous power does it provide?

The generator provides 19 kW of prime running power and up to 19.9 kW of limited-time power.

Is the 20CM50 a single-phase generator?

Yes. It is a 230V single-phase marine generator designed for 50 Hz vessel electrical systems.

Can it power marine air conditioning?

It can support compatible marine air-conditioning equipment when the vessel’s total continuous demand and compressor-starting loads remain within the generator’s capacity. A complete electrical-load assessment is recommended.

Is a sound enclosure available?

Yes. The Q2400 – 20CM50 is available without an enclosure, with a soundshield, or in a Soundless configuration.

Can it replace an existing yacht generator?

Yes. It may be suitable for a marine generator replacement when output, voltage, frequency, installation dimensions, cooling, exhaust, and electrical arrangements are compatible.

Request a Quote for the Nanni Q2400 – 20CM50

The New Nanni Generator Type Q2400 – 20CM50 Marine Generator is a dependable choice for yacht owners, boat builders, shipyards, and professional operators seeking nearly 20 kW of reliable single-phase marine power.

Contact our marine generator specialists to request the latest Nanni Q2400 – 20CM50 price, confirm availability, review installation requirements, and receive assistance selecting the correct configuration for your vessel.