Nanni Generator Type QLS 65T (Mechanical)

Description

New Nanni Generator Type QLS 65T Mechanical Marine Generator For Sale

Reliable Three-Phase Marine Power for Yachts and Commercial Vessels

The New Nanni QLS 65T Mechanical Marine Generator is a robust three-phase marine diesel generator engineered to provide dependable onboard electricity for large motor yachts, expedition vessels, passenger craft, commercial workboats, fishing vessels, and other professional marine applications. Built around a proven John Deere diesel engine and paired with a Leroy-Somer alternator, the QLS 65T combines mechanically controlled diesel technology, low-speed operation, marine-grade cooling, and reliable electrical performance.

Designed for vessels using a 400V three-phase electrical system, the QLS 65T provides 53.7 kW of prime power, equivalent to approximately 65.4 kVA, at 50 Hz. It also provides approximately 37.5 kW or 45.8 kVA of continuous power. This capacity makes the generator suitable for operating compatible pumps, refrigeration equipment, ventilation systems, hydraulic power units, water makers, battery chargers, galley equipment, workshop machinery, and other demanding onboard electrical loads. (Nanni Industries)

The Nanni QLS 65T is designed for operators who value durable mechanical engineering and practical serviceability. Its mechanically controlled fuel system may be particularly attractive for commercial vessels and long-range operators seeking a dependable marine generator set with reduced reliance on complex electronic fuel-management components.

Selecting the correct marine generator requires more than comparing maximum output ratings. Vessel owners, shipyards, boat builders, and marine engineers should also consider continuous electrical demand, equipment startup loads, phase balance, machinery-space dimensions, cooling-water requirements, ventilation, exhaust routing, operating hours, and future electrical expansion.

Purpose-Built Nanni QLS Marine Engineering

The Nanni QLS marine generator range is developed for pleasure, commercial, and continuous-duty marine applications. Nanni pairs the QLS series with Leroy-Somer alternators selected for reliability, versatility, and dependable electrical generation in demanding operating environments. (Nanni Industries)

Unlike a conventional industrial generator adapted for installation aboard a vessel, the QLS 65T is configured as an integrated marine power-generation system. Its diesel engine, alternator, heat-exchanger cooling, raw-water circuit, wet-exhaust arrangement, fuel system, electrical protection, and mounting structure are designed around the practical requirements of onboard operation.

The generator is engineered to operate in environments affected by:

• Continuous vibration
• High humidity
• Saltwater exposure
• Restricted machinery-space ventilation
• Changing electrical demand
• Vessel movement and inclination
• Extended operating periods

The QLS 65T uses a four-cylinder John Deere diesel engine with approximately 4.5 litres of displacement. The engine features direct mechanical fuel injection, turbocharged air intake, and a rated operating speed of 1500 RPM. (Nanni Industries)

The 1500 RPM operating speed supports stable 50 Hz electrical generation while helping reduce mechanical wear and vibration compared with many higher-speed generator designs.

Customers evaluating the Nanni Generator Type QLS 65T Mechanical price should consider more than the initial purchase cost. Electrical capacity, fuel-system simplicity, service accessibility, installation compatibility, marine durability, operating requirements, and long-term support all contribute to the generator’s overall value.

Mechanical John Deere Diesel Performance

The QLS 65T uses a proven John Deere engine platform designed for reliable power generation under sustained electrical demand.

Its main engine characteristics include:

• Four cylinders in line
• Four-stroke diesel operation
• Approximately 4.5-litre displacement
• Direct mechanical fuel injection
• Turbocharged air intake
• Mechanical fuel regulation
• 1500 RPM operation
• Marine heat-exchanger cooling

The mechanical fuel system may provide practical advantages for operators who prioritize straightforward servicing and familiar diesel technology.

Potential benefits include:

• Reduced dependence on electronic fuel controls
• Familiar mechanical troubleshooting procedures
• Practical servicing in remote operating areas
• Durable fuel-system architecture
• Reliable operation in commercial marine environments

Mechanical fuel control does not eliminate the need for scheduled maintenance. Clean fuel, effective filtration, correct injector condition, fuel-pump calibration, proper lubrication, and reliable cooling remain essential for long-term performance.

A correctly sized diesel marine generator allows vessel owners and professional operators to maintain essential electrical services while cruising, remaining at anchor, or working offshore without relying on shore power.

It can also reduce the need to operate the vessel’s propulsion engines solely for battery charging or auxiliary electrical production.

Continuous and Prime Power Ratings

Understanding generator ratings is important when selecting an auxiliary marine power system.

The Nanni QLS 65T provides:

Nanni identifies the QLS 65T as a 53.7 kW prime-power generator operating at 400V, three phase, and 50 Hz. (Nanni Industries)

The continuous rating should be considered when evaluating sustained electrical demand, while the applicable prime rating should be reviewed according to the vessel’s operating profile and Nanni’s approved duty conditions.

The vessel’s expected electrical load should leave reasonable reserve capacity for temporary demand increases and motor-starting requirements.

Equipment such as pumps, compressors, refrigeration systems, hydraulic machinery, ventilation motors, and water makers may require substantially more electricity during startup than during normal operation.

Selecting a generator that is too small may result in:

• Electrical overload
• Voltage instability
• Excessive operating temperatures
• Difficulty starting large electric motors
• Frequent protective shutdowns
• Reduced generator service life

However, selecting a generator that is significantly larger than required may result in prolonged operation under very light loads. A professional marine electrical load assessment helps balance electrical capacity, startup demand, operating reserve, efficiency, and long-term generator performance.

Stable 400V Three-Phase Electrical Output

The QLS 65T is designed for vessels requiring dependable 400V three-phase marine power. Three-phase electrical systems are commonly used aboard larger yachts and commercial vessels because they distribute power efficiently to compatible motors, pumps, compressors, and auxiliary machinery.

The generator may support compatible equipment such as:

• Marine air-conditioning systems
• Seawater and freshwater pumps
• Refrigeration and cold-storage equipment
• Ventilation and extraction machinery
• Hydraulic power units
• Water-making systems
• Battery-charging equipment
• Commercial galley machinery
• Workshop tools
• Auxiliary electric motors
• Navigation and communication systems
• Professional marine equipment

The QLS range uses Leroy-Somer marine alternators, which are recognized for dependable construction and versatile power-generation applications. (Nanni Industries)

Before installation, a qualified marine electrician should verify:

• Generator voltage
• Electrical frequency
• Phase rotation
• Earthing and bonding arrangements
• Cable sizes
• Circuit protection
• Switchboard compatibility
• Load distribution

Single-phase equipment may be supplied through a correctly designed three-phase distribution system. However, loads should be balanced appropriately across the phases because excessive imbalance may affect voltage stability and reduce available generator capacity.

Reliable Power for Sensitive Onboard Equipment

Modern yachts and professional vessels depend on stable electricity for navigation, communication, monitoring, safety, refrigeration, passenger comfort, and daily operation.

The QLS generator range is designed to provide dependable electrical power for equipment that may be sensitive to voltage variation. Its combination of low-speed diesel operation and a robust alternator supports stable onboard electricity when the generator is correctly installed and operated. (Nanni Industries)

A dependable vessel power-generation system may support:

• Navigation electronics
• Communication equipment
• Vessel-monitoring systems
• Battery chargers
• Refrigeration controls
• Pumps and motor starters
• Lighting circuits
• Safety and alarm systems
• Commercial operating equipment

Electrical performance depends on more than the generator itself. Correct engine speed, voltage regulation, cable sizing, grounding, protection settings, phase balance, and switchboard design all influence the quality of onboard power.

Professional installation and commissioning are therefore important for dependable long-term operation.

Marine Cooling for Sustained Operation

Reliable cooling is essential for dependable marine generator performance. Unlike land-based generators operating in open surroundings, onboard generator sets are normally installed inside enclosed machinery spaces where heat must be removed efficiently.

The Nanni QLS 65T uses a dedicated marine generator cooling system designed to maintain stable engine temperature during operation. Its marine configuration is based on closed-circuit engine cooling, heat exchange, raw-water circulation, and a wet-exhaust arrangement.

A properly maintained cooling system supports:

• Stable engine operating temperature
• Efficient heat transfer
• Reliable operation under sustained electrical loads
• Reduced thermal stress
• Protection of internal engine components
• Longer generator service life

Routine maintenance should include inspection of:

• Engine coolant condition
• Raw-water strainers
• Seawater flow
• Cooling hoses and clamps
• Drive belts
• Raw-water pump impellers
• Heat-exchanger components
• Wet-exhaust connections

Restricted seawater flow, damaged impellers, blocked cooling passages, or inadequate machinery-space ventilation can cause overheating even when the generator is correctly sized.

Where the generator is installed below the vessel’s waterline, the seawater and exhaust arrangement should be evaluated for siphoning risk. A correctly installed siphon break may be required depending on the vessel configuration.

Compact Heavy-Duty Installation Design

The QLS 65T provides substantial electrical output from a relatively compact four-cylinder generator platform.

Nanni lists the following approximate dimensions and dry weight:

These dimensions are based on Nanni’s published product guide and should be treated as reference values. Final machinery-space planning should use the approved model-specific installation drawing. (Nanni Industries)

Before installation, the vessel’s engineering team should confirm:

• Overall generator dimensions
• Dry and operating weight
• Mounting-point locations
• Machinery-space access
• Maintenance clearances
• Ventilation requirements
• Seawater connections
• Exhaust routing
• Fuel supply and return connections
• Electrical cable access
• Lifting arrangements
• Future generator-removal requirements

When replacing an existing boat generator, matching only the electrical output is not sufficient. Voltage, frequency, phase configuration, dimensions, mounting arrangements, cooling capacity, exhaust requirements, fuel-system compatibility, and switchboard integration should also be verified.

A professional installation assessment can reduce unexpected modifications and ensure that the selected marine generator replacement remains accessible for routine servicing.

Applications of the Nanni QLS 65T Mechanical Generator

Large Motor Yachts

The generator can provide dependable electricity for compatible air-conditioning equipment, refrigeration, water makers, pumps, battery chargers, lighting, galley appliances, and navigation systems.

Expedition and Long-Range Vessels

Its mechanical diesel configuration may appeal to operators requiring a practical auxiliary marine generator for extended voyages and remote operating areas.

Commercial Workboats

The QLS 65T may serve as a dependable commercial marine generator for hydraulic equipment, pumps, refrigeration systems, workshop machinery, communications, and operational loads.

Passenger Vessels

The generator can support compatible ventilation, refrigeration, lighting, galley equipment, battery charging, pumps, and passenger-service systems.

Fishing Vessels

The QLS 65T may provide power for refrigeration equipment, pumps, deck machinery, lighting, communication equipment, and other compatible working loads.

Marine Refit Projects

The generator may be considered when replacing an ageing, inefficient, or unreliable three-phase genset, provided the vessel’s electrical and installation requirements are compatible.

Technical Specifications of the Nanni QLS 65T Mechanical

The QLS 65T is officially listed with a four-cylinder John Deere engine, mechanical direct fuel injection, turbocharged air intake, 4.5-litre displacement, 1500 RPM operating speed, and 53.7 kW prime output. (Nanni Industries)

Final alternator specifications, equipment configuration, installation requirements, and approved operating ratings should be confirmed before ordering.

Standard Marine Equipment and Available Options

The Nanni QLS 65T is supplied as an integrated marine diesel generator set designed for dependable onboard operation.

Typical marine equipment may include:

• Four-cylinder John Deere diesel engine
• Leroy-Somer three-phase alternator
• Mechanical fuel-control system
• Direct fuel injection
• Turbocharged air intake
• Marine heat-exchanger cooling
• Raw-water circulation equipment
• Marine wet-exhaust components
• Fuel and oil filtration
• Generator protection equipment
• Flexible mounting arrangement
• Operating and maintenance documentation

Available installation options may include:

• Sound enclosure
• Fuel pre-filter
• Fuel-water separator
• Siphon-break equipment
• Remote generator monitoring
• Additional marine installation accessories

The exact standard equipment and optional package should be confirmed during quotation because production configurations and vessel requirements may vary.

Genuine Nanni Generator Supply and Worldwide Support

Customers looking for the New Nanni Generator Type QLS 65T Mechanical Marine Generator for sale can contact our marine specialists for current availability, technical guidance, configuration information, and international delivery assistance.

We support customers with:

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

Whether you are completing a commercial-vessel refit, upgrading a yacht’s electrical system, or installing a new three-phase onboard power system, selecting the correct generator configuration can reduce installation problems and improve long-term operating reliability.

Frequently Asked Questions

What is the Nanni QLS 65T Mechanical price?

The Nanni QLS 65T Mechanical price depends on current availability, selected equipment, shipping destination, export requirements, and delivery arrangements. Contact our team for an updated quotation.

How much power does the QLS 65T provide?

The generator provides approximately 37.5 kW or 45.8 kVA of continuous power and 53.7 kW or 65.4 kVA of prime power. (Nanni Industries)

Is the QLS 65T a three-phase generator?

Yes. It provides 400V three-phase marine power at 50 Hz with a 0.8 power factor. (Nanni Industries)

What engine is used in the QLS 65T?

The generator uses a four-cylinder John Deere diesel engine with approximately 4.5 litres of displacement, mechanical direct fuel injection, and turbocharged air intake. (Nanni Industries)

What does “Mechanical” mean?

The mechanical designation refers to the engine’s mechanically controlled fuel system. This provides a more traditional diesel configuration with reduced dependence on electronic fuel-management components.

Is the QLS 65T suitable for commercial vessels?

Yes. Its substantial three-phase capacity and mechanically controlled John Deere engine make it suitable for compatible workboats, passenger vessels, fishing boats, expedition craft, and other professional marine applications.

Can it replace an existing marine generator?

Yes. It may be suitable for a marine generator replacement when output, voltage, frequency, phase configuration, dimensions, mounting, cooling, exhaust, fuel, and switchboard requirements are compatible.

Is worldwide shipping available?

Yes. We support customers with international marine generator supply, export documentation, and worldwide shipping arrangements.

Request a Quote for the Nanni QLS 65T Mechanical Marine Generator

The New Nanni QLS 65T Mechanical Marine Generator is a dependable choice for yacht owners, shipyards, vessel managers, and commercial operators requiring substantial three-phase marine power from a mechanically controlled John Deere diesel platform.

Contact our marine generator specialists to request the latest Nanni QLS 65T Mechanical price, confirm current availability, review installation requirements, and receive assistance selecting the correct generator configuration for your vessel.