Nanni Generator Type Q4500 – 60ST50

Description

New Nanni Generator Type Q4500 – 60ST50 Marine Generator For Sale

High-Capacity Soundless Marine Power for Large Yachts and Professional Vessels

The New Nanni Q4500 60ST50 Marine Generator is a high-capacity three-phase marine diesel generator engineered for large motor yachts, superyachts, expedition vessels, passenger craft, commercial workboats, and professional marine applications. Built around a turbocharged John Deere diesel engine and coupled to a Leroy-Somer alternator, this generator combines dependable electrical output, low-speed operation, advanced controls, and a sound-attenuated marine configuration.

According to Nanni’s dedicated technical sheet, the 60ST50 delivers 57.5 kW of prime running power and up to 63.3 kW of limited-time power at 230/400V and 50 Hz. Its three-phase output makes it suitable for demanding equipment such as pumps, compressors, refrigeration plants, ventilation systems, hydraulic power units, water makers, battery chargers, galley machinery, and other substantial onboard loads.

The Q4500 – 60ST50 is intended for vessels whose electrical demands exceed the practical capacity of smaller auxiliary gensets. Its combination of durable diesel engineering, marine cooling, electronic speed regulation, and acoustic treatment makes it a capable onboard power solution for continuous recreational and professional use.

Selecting the correct marine generator requires more than comparing maximum output ratings. Vessel owners, shipyards, and installers should also evaluate continuous demand, motor-starting loads, phase balance, machinery-space dimensions, ventilation, cooling-water supply, exhaust routing, operating hours, and future electrical upgrades.

Purpose-Built Nanni Q4500 Marine Engineering

The New Nanni Q4500 60ST50 marine generator is designed as an integrated marine power package rather than a conventional industrial generator adapted for boat installation. Its engine, alternator, heat exchanger, raw-water circuit, wet exhaust, digital controls, electrical protection, and mounting configuration are developed around demanding onboard conditions.

The Q4500 platform uses a 4.5-litre, four-cylinder, four-stroke John Deere diesel engine with a cast-iron block, turbocharged air intake, common-rail fuel injection, electronic governing, automatic preheating, and a gear-driven valve train. The 60ST50 operates at 1500 RPM to produce 50 Hz electricity.

Low-speed operation helps reduce mechanical wear, vibration, and operating noise compared with many 3000 RPM generator designs. Electronic governing helps maintain consistent engine speed as connected electrical demand rises or falls, supporting reliable frequency control.

Customers evaluating the Nanni Generator Type Q4500 – 60ST50 price should consider the complete operating value rather than only the initial purchase cost. Electrical capacity, acoustic performance, service accessibility, fuel efficiency, marine durability, controls, installation compatibility, and long-term technical support all influence the generator’s value aboard a working vessel.

Turbocharged John Deere Diesel Performance

The Q4500 – 60ST50 uses a John Deere engine platform designed to provide dependable power under sustained electrical demand. Its turbocharged intake system supports the output required from a nearly 60 kW prime-rated generator while retaining a compact four-cylinder arrangement.

Its main engine characteristics include:

• Four cylinders in line
• Four-stroke diesel operation
• Approximately 4.5 litres of displacement
• Turbocharged intake
• High-pressure common-rail fuel injection
• Electronic engine-speed regulation
• Automatic preheating
• 1500 RPM operation at 50 Hz

The engine uses primary and secondary fuel filtration rated at 10 and 2 microns respectively. Nanni also specifies continuous operation at vessel angles up to 30 degrees and intermittent operation up to 45 degrees, illustrating the unit’s adaptation to marine service.

A correctly sized diesel marine generator allows operators to maintain essential vessel services without depending on shore power or running the main propulsion engines solely for auxiliary electricity.

Prime and Limited-Time Output Ratings

Understanding power classifications is essential when selecting an auxiliary marine generator.

The Q4500 – 60ST50 provides:

Prime running power is the more relevant rating for sustained vessel demand. Nanni defines prime power for unrestricted running time, subject to the published operating conditions, while limited-time power is intended for non-variable-load operation for a restricted number of hours annually.

A vessel’s normal electrical load should generally remain below the prime rating, leaving reserve for pumps, compressors, refrigeration machinery, and other equipment that may draw considerably more current during startup.

An undersized generator may suffer overload, unstable voltage, overheating, and shortened service life. An unnecessarily oversized generator may spend prolonged periods under very light load. A professional marine electrical load assessment helps establish the correct balance.

Stable Three-Phase Electrical Performance

The 60ST50 uses a Leroy-Somer LSAM 44.3 alternator with Class H insulation, IP23 protection, and voltage regulation specified at approximately ±0.5%. These characteristics support stable electrical delivery for compatible onboard machinery and sensitive vessel systems.

This three-phase marine generator may support equipment such as:

• Seawater and freshwater pumps
• Air-conditioning compressors
• Refrigeration and cold-storage systems
• Ventilation and extraction equipment
• Hydraulic power packs
• Water-making systems
• Battery chargers
• Commercial galley machinery
• Workshop tools
• Auxiliary motors
• Vessel monitoring and communication systems

Single-phase loads may be supplied through a properly engineered three-phase distribution system, but they should be balanced across phases. Excessive imbalance can affect electrical stability and available generator capacity.

A qualified marine electrician should verify voltage, frequency, phase rotation, earthing, cable sizes, circuit protection, and compatibility with the vessel’s switchboard before installation.

Fuel Consumption at Different Loads

Fuel use varies according to connected demand. Nanni’s official technical sheet lists approximate 50 Hz consumption as follows:

Actual consumption may vary with operating conditions, maintenance, fuel quality, ambient temperature, ventilation, and installation.

Correct generator sizing can improve fuel efficiency. The goal is to provide enough reserve for transient loads without selecting a unit that routinely operates far below its practical working range. New Nanni Q4500 60ST50 Marine Cooling for Sustained Operation

Reliable cooling is fundamental to marine generator performance. The New Nanni Q4500 60ST50 uses an engine-coolant aftercooling arrangement, belt-driven centrifugal coolant pump, freshwater-cooled exhaust manifold, and bronze seawater pump with a neoprene rotor.

Nanni specifies raw-water flow of approximately 79 litres per minute at 50 Hz, helping transfer heat from the closed coolant circuit to the seawater side.

A properly maintained marine generator cooling system supports:

• Stable engine temperature
• Reliable output under sustained loads
• Reduced thermal stress
• Protection of internal components
• Consistent offshore performance
• Longer equipment life

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

A siphon break is required where the generator is installed below the vessel’s waterline to help prevent seawater from siphoning through the exhaust system into the engine.

SI-2 Digital Control and Protection

The Q4500 platform includes Nanni’s SI-2 digital control panel, allowing operators to start and stop the generator, monitor engine and generator parameters, review status information, and view alerts or fault codes.

The advanced control system includes:

• Engine and generator parameter displays
• True RMS electrical measurement
• User-configurable protections
• RS485 communication
• Remote-display capability
• Real-time clock with battery backup
• Operating-history storage
• Multilingual menus
• Standby and prime-power support

These features help operators identify abnormal conditions before they become more serious. Digital monitoring does not replace preventive maintenance, but it strengthens day-to-day supervision and fault diagnosis.

Soundless Configuration and Installation Dimensions

The “ST” designation identifies this model as a sound-attenuated three-phase configuration. The enclosure is designed for effective sound reduction while preserving access to internal components and service points.

The connection panel accommodates battery cables, grounding, fuel supply and return, seawater inlet, water-cooled exhaust outlet, power wiring, circuit breaker, control panel, and emergency switch.

These dimensions should be treated as reference data. Nanni advises using approved installation drawings rather than the general datasheet for final machinery-space planning.

A properly installed quiet marine generator should also include appropriate flexible mounts, effective ventilation, correctly supported hoses and cables, an engineered wet-exhaust system, and sufficient service clearance.

Applications of the New Nanni Q4500 60ST50

The Q4500 – 60ST50 may be suitable for:

• Large motor yachts and superyachts
• Expedition and long-range cruising vessels
• Passenger and hospitality vessels
• Commercial workboats
• Offshore-support craft
• Large sailing yachts
• Yacht refit projects
• High-capacity generator replacement

It can serve as a commercial marine generator for pumps, refrigeration, hydraulic equipment, ventilation, galley systems, workshop machinery, charging equipment, and other demanding onboard services.

When considering it as a marine generator replacement, verify output, voltage, phase, physical dimensions, mounting, ventilation, seawater supply, exhaust back pressure, fuel connections, switchboard compatibility, and access for future servicing.

Technical Specifications

These ratings come from Nanni’s dedicated 60ST50/60WT50 technical sheet. Final specifications should be confirmed at quotation stage because Nanni reserves the right to revise product characteristics.

Genuine Nanni Supply and Worldwide Support

Customers looking for the New Nanni Q4500 60ST50 Marine Generator for sale can contact our marine specialists for availability, configuration guidance, installation data, export documentation, and international delivery arrangements.

We support customers with:

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

Frequently Asked Questions

What is the Nanni Q4500 – 60ST50 price?

The Nanni Generator Type Q4500 – 60ST50 price depends on configuration, optional equipment, current availability, destination, and shipping requirements. Contact our team for an updated quotation.

How much power does it produce?

The official technical sheet rates the 60ST50 at 57.5 kW prime power and 63.3 kW limited-time power.

Is it a three-phase generator?

Yes. It supplies 230/400V three-phase power at 50 Hz.

Is the Soundless enclosure included?

The ST model represents the sound-attenuated configuration. Final enclosure specification and included equipment should be confirmed on the quotation.

Can it replace an existing yacht generator?

Yes, provided the electrical ratings, dimensions, cooling, exhaust, fuel, ventilation, mounting, and switchboard arrangements are compatible.

Request a Quote for the New Nanni Q4500 60ST50

The New Nanni Generator Type Q4500 – 60ST50 Marine Generator is a capable choice for superyacht owners, shipyards, commercial operators, and professional vessel managers requiring substantial three-phase marine power with improved acoustic performance.

Contact our marine generator specialists to request the latest New Nanni Q4500 60ST50 price, confirm availability, review installation requirements, and select the correct configuration for your vessel.