Nanni Generator Type QLS47T

Description

New Nanni Generator Type QLS47T Marine Generator For Sale

Heavy-Duty Three-Phase Marine Power for Yachts and Commercial Vessels

The New  Nanni QLS47T Marine Generator is a robust, low-speed 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 four-cylinder Kubota diesel engine and paired with a reliable Leroy-Somer alternator, the QLS47T combines mechanical fuel control, turbocharged diesel performance, marine-grade cooling, and practical long-term serviceability.

Designed for vessels using a 400V three-phase electrical system, the QLS47T provides approximately 34.4 kW or 43 kVA of continuous power and up to 37.8 kW or 47.2 kVA of prime power at a 0.8 power factor. The generator operates at 50 Hz and 1500 RPM, making it suitable for compatible marine air-conditioning systems, refrigeration equipment, pumps, battery chargers, ventilation machinery, hydraulic equipment, water makers, galley appliances, navigation systems, and other demanding onboard electrical loads. (Nanni Industries)

The New Nanni QLS47T offers a substantial increase in electrical capacity compared with the smaller QLS10T, QLS13T, QLS22T, and QLS32T models while retaining the practical maintenance advantages of a mechanically controlled diesel platform. Its turbocharged 3.8-litre engine provides the additional power required for larger onboard electrical systems without moving to a larger six-cylinder generator platform.

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

Purpose-Built Nanni QLS Marine Engineering

The Nanni QLS marine generator range is developed for pleasure-duty and professional marine applications. Nanni equips the QLS series with Leroy-Somer alternators, which are internationally recognized for dependable construction, electrical performance, and versatility. The QLS generator range is designed to provide reliable power for recreational vessels while remaining suitable for demanding continuous-duty applications. (Nanni Industries)

Unlike a portable generator or a conventional industrial power unit adapted for installation aboard a vessel, the New Nanni QLS47T is configured as an integrated marine power-generation system. Its diesel engine, alternator, marine cooling system, raw-water circuit, exhaust arrangement, electrical protection, and mounting structure are designed around demanding onboard operating conditions.

The generator is engineered to perform in marine environments affected by:

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

The QLS47T uses a four-cylinder, inline, four-stroke Kubota diesel engine with approximately 3.8 litres of displacement. The engine features mechanical fuel regulation, direct fuel injection, turbocharged air intake, and 1500 RPM operation for stable 50 Hz electrical generation. (Nanni Industries)

Its 1500 RPM operating speed helps reduce mechanical wear, vibration, and operating noise compared with many higher-speed generator systems. The low-speed configuration also supports dependable operation during extended periods of onboard power generation.

Customers evaluating the Nanni Generator Type QLS47T price should consider more than the initial purchase cost. Electrical capacity, engine durability, mechanical simplicity, installation compatibility, marine cooling, service accessibility, operating requirements, and long-term technical support all contribute to the generator’s overall value.

Turbocharged Four-Cylinder Kubota Diesel Performance

The QLS47T uses a proven Kubota diesel engine platform developed for reliable power generation. Kubota engines are widely used in marine, industrial, agricultural, and generator applications because of their durable construction, practical servicing, and established operating history.

The engine configuration includes:

• Four cylinders in line
• Four-stroke diesel operation
• Approximately 3.8-litre displacement
• Mechanical fuel regulation
• Direct diesel injection
• Turbocharged air intake
• 1500 RPM rated operating speed

The turbocharger increases the quantity of air supplied to the engine, helping the New Nanni QLS47T produce greater electrical output from its four-cylinder platform. Direct fuel injection supports efficient fuel delivery and dependable combustion under changing generator loads.

The mechanical fuel system may appeal to yacht owners and professional operators who value familiar servicing procedures and reduced dependence on complex electronic fuel-management components.

Potential benefits include:

• Practical mechanical servicing
• Familiar diesel troubleshooting procedures
• Straightforward fuel-system architecture
• Reduced dependence on electronic engine controls
• Established Kubota engine technology
• Suitability for remote cruising and commercial operation

Mechanical fuel regulation does not eliminate the need for preventive maintenance. Clean diesel fuel, effective filtration, correct injector performance, reliable lubrication, proper cooling, and scheduled servicing remain essential for dependable long-term operation.

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

It can also reduce the need to operate the vessel’s main 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 QLS47T provides:

Nanni identifies the QLS47T as a 37.8 kW prime-power marine generator. The prime-power rating is stated according to ISO 8528-1 and represents the generator’s published operating capacity under the applicable duty conditions. (Nanni Industries)

The vessel’s normal electrical demand should remain within the approved operating capacity while leaving reasonable reserve for temporary increases in load.

Equipment such as air-conditioning compressors, refrigeration plants, pumps, electric motors, battery chargers, ventilation systems, hydraulic power units, 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 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 generator capacity, startup demand, operating reserve, fuel efficiency, and long-term engine performance.

Stable 400V Three-Phase Electrical Output

The QLS47T is designed for vessels requiring dependable 400V three-phase marine power. Three-phase electrical systems are commonly used aboard large 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 freezer equipment
• Ventilation and extraction machinery
• High-capacity battery chargers
• Water-making equipment
• Hydraulic power units
• Commercial galley equipment
• Workshop machinery
• Navigation electronics
• Communication systems
• Auxiliary electric motors

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 engineered three-phase distribution system. However, loads should be balanced appropriately across all phases because excessive imbalance may reduce available generator capacity and affect voltage stability.

Dependable Electricity for Modern Vessel Systems

Modern yachts and professional vessels rely on stable electricity for navigation, communication, safety systems, refrigeration, battery charging, climate control, lighting, monitoring, and daily onboard operations.

The Nanni QLS47T generator set is designed to provide dependable electrical power as connected demand changes. Stable voltage and frequency are particularly important for vessels operating sensitive electronic equipment and several motor-driven systems simultaneously.

A reliable vessel power-generation system may support:

• Navigation displays
• Communication equipment
• Battery chargers
• Refrigeration controls
• Vessel-monitoring systems
• Lighting circuits
• Pumps and motor starters
• Safety and alarm equipment
• Domestic onboard appliances
• Professional operating equipment

Electrical performance depends on the complete installation rather than the generator alone. Engine-speed stability, alternator regulation, cable sizing, grounding, circuit protection, phase balance, and switchboard design all influence onboard power quality.

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

Marine Cooling for Sustained Generator Operation

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

The QLS47T uses a dedicated marine generator cooling system designed to maintain stable engine temperature during extended operation. Its marine configuration is based on closed-circuit engine cooling, heat exchange, raw-water circulation, and a marine wet-exhaust arrangement.

A properly maintained cooling system supports:

• Stable engine operating temperature
• Efficient heat transfer
• Reliable performance under sustained electrical demand
• 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 may 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. An appropriately installed siphon break may be required depending on the vessel configuration.

Compact Heavy-Duty Generator Design

The QLS47T provides substantial three-phase electrical capacity from a four-cylinder generator platform.

Nanni publishes the following approximate dimensions and dry weight:

These dimensions apply to the standard QLS47T configuration 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 operational 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 inspection and future servicing.

Low-Speed Operation and Improved Onboard Comfort

Noise and vibration are important considerations aboard yachts, passenger vessels, expedition craft, and liveaboard boats.

The New Nanni QLS47T operates at 1500 RPM, helping reduce mechanical speed, vibration, and operating noise compared with many higher-speed generator systems. Its four-cylinder engine configuration also supports smooth operation under changing electrical demand.

A correctly installed quiet marine generator should include:

• Flexible anti-vibration mounts
• Effective machinery-space ventilation
• Properly supported hoses and electrical cables
• A professionally designed wet-exhaust system
• Suitable compartment insulation
• Adequate maintenance clearance

Final onboard noise depends on the complete installation. Hull construction, mounting quality, exhaust design, ventilation openings, machinery-space insulation, and vibration transfer through the vessel structure all influence acoustic performance.

Applications of the Nanni QLS47T Marine Generator

Large Motor Yachts

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

Expedition and Long-Range Vessels

The QLS47T may provide reliable auxiliary marine power for vessels operating for extended periods away from shore facilities.

Commercial Workboats

The generator can serve as a dependable commercial marine generator for hydraulic equipment, pumps, refrigeration systems, workshop machinery, communication equipment, and operational loads.

Passenger Vessels

The New Nanni QLS47T may support compatible ventilation, refrigeration, lighting, galley equipment, pumps, battery charging, and passenger-service systems.

Fishing Vessels

The generator can provide electrical power for refrigeration equipment, pumps, lighting, communications, battery chargers, and compatible deck-support systems.

Marine Refit Projects

The QLS47T may be considered when replacing an ageing, inefficient, undersized, or unreliable three-phase generator, provided the vessel’s electrical and installation requirements are compatible.

Technical Specifications of the Nanni QLS47T

The New Nanni QLS47T is officially listed by Nanni with 37.8 kW or 47.2 kVA of prime power, 400V three-phase output, a four-cylinder Kubota diesel engine, mechanical fuel regulation, direct injection, turbocharged air intake, and 1500 RPM operation. (Nanni Industries)

Final alternator specifications, control equipment, standard accessories, optional equipment, and installation requirements should be confirmed before ordering.

Standard Marine Equipment and Available Options

The Nanni QLS47T is supplied as an integrated marine diesel generator set designed for dependable onboard installation.

Typical marine equipment may include:

• Four-cylinder Kubota diesel engine
• Leroy-Somer three-phase alternator
• Mechanical fuel-control system
• Direct diesel 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 specifications, regional configurations, and vessel requirements may vary.

Genuine Nanni Generator Supply and Worldwide Support

Customers looking for the New Nanni Generator Type QLS47T 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 yacht refit, upgrading a commercial vessel, or installing a new three-phase onboard power system, selecting the correct generator configuration can reduce installation challenges and improve long-term operating reliability.

Frequently Asked Questions

What is the New Nanni QLS47T price?

The Nanni Generator Type QLS47T 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 QLS47T provide?

The generator provides approximately 34.4 kW or 43 kVA of continuous power and up to 37.8 kW or 47.2 kVA of prime power. (Nanni Industries)

Is the QLS47T 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 QLS47T?

The generator uses a four-cylinder Kubota diesel engine with approximately 3.8 litres of displacement, mechanical fuel regulation, direct injection, and turbocharged air intake. (Nanni Industries)

What does the “T” designation mean?

The “T” designation identifies the QLS47T as a three-phase marine generator.

Is the New Nanni QLS47T suitable for commercial vessels?

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

Can it support air conditioning and refrigeration equipment?

Yes, provided the combined continuous demand and equipment startup loads remain within the generator’s approved operating capacity.

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 QLS47T Marine Generator

The New Nanni QLS47T Marine Generator is a dependable choice for yacht owners, shipyards, vessel managers, boat builders, and commercial operators requiring substantial three-phase marine power from a low-speed, mechanically controlled Kubota diesel platform.

Contact our marine generator specialists to request the latest Nanni QLS47T price, confirm current availability, review installation requirements, and receive assistance selecting the correct generator configuration for your vessel.