Nanni Generator Type QMS7.5M

Description

New Nanni Generator Type QMS7.5M Marine Generator For Sale

Compact 7.5 kW Single-Phase Marine Power for Yachts and Boats

The New Nanni QMS7.5M Marine Generator is a compact, low-speed marine diesel generator designed to provide dependable onboard electricity for sailing yachts, motor yachts, cruising catamarans, liveaboard boats, and smaller professional vessels. Built around a proven three-cylinder Kubota diesel engine, the QMS7.5M combines efficient operation, stable single-phase output, marine-grade cooling, and practical access to important service components.

Designed for vessels using a 230V single-phase electrical system, the QMS7.5M provides 6.6 kW of continuous power and up to 7.5 kW of maximum power at 50 Hz. Its electrical capacity makes it suitable for compatible battery chargers, refrigeration systems, navigation equipment, communication devices, freshwater pumps, lighting circuits, galley appliances, entertainment equipment, and other essential onboard loads. (Nanni Diesel)

The QMS7.5M offers a practical balance between useful electrical output and compact installation dimensions. It is particularly suitable for vessel owners who require more power than a small high-speed generator can provide but do not need the capacity or physical size of a larger yacht generator.

Selecting the correct marine generator involves more than comparing its maximum kilowatt rating with the combined wattage of the equipment aboard the vessel. Continuous demand, equipment starting loads, installation space, ventilation, cooling-water supply, exhaust routing, operating hours, and future electrical additions should all be considered before purchase.

Purpose-Built Nanni QMS Marine Engineering

The Nanni QMS generator range is developed specifically for onboard marine power generation. Unlike a portable generator or conventional industrial power unit adapted for boat use, the QMS7.5M is configured as an integrated marine diesel generator set with cooling, exhaust, electrical, and maintenance features designed for vessel installation.

The generator uses a three-cylinder, four-stroke diesel engine with approximately 1,123 cm³ of displacement. Its naturally aspirated engine operates at 1500 RPM, providing stable 50 Hz electrical output while helping reduce friction, mechanical wear, vibration, and operating noise compared with many 3000 RPM generator systems. (Nanni Diesel)

Nanni’s QMS range is designed to operate in environments affected by:

• Continuous vessel vibration
• High humidity
• Saltwater exposure
• Limited machinery-space ventilation
• Changing electrical demand
• Vessel movement and inclination
• Extended operation away from shore power

Customers evaluating the Nanni QMS7.5M price should consider more than the initial purchase cost. Low-speed operation, fuel efficiency, service accessibility, installation compatibility, cooling-system design, available sound enclosure, and long-term maintenance requirements all influence the generator’s overall value.

Proven Three-Cylinder Diesel Performance

The QMS7.5M uses a robust diesel-engine platform tested in marine and industrial applications. Its cast-iron tunnel-type engine block and gear-driven timing system are designed to provide dependable operation and long-term durability. (Nanni Diesel)

The engine configuration includes:

• Three cylinders in line
• Four-stroke diesel operation
• Approximately 1.123-litre displacement
• Naturally aspirated air intake
• Mechanical diesel operation
• 1500 RPM rated speed
• Marine heat-exchanger cooling

The generator also uses Nanni’s E-TVCS combustion system. This system creates controlled air movement inside the combustion chamber to improve the air-and-fuel mixture, supporting more efficient combustion and lower fuel consumption. A Super Glow starting system is supplied to assist engine starting in colder conditions. (Nanni Diesel)

A correctly sized diesel marine generator allows boat owners to operate essential electrical equipment while cruising, remaining at anchor, or spending extended periods away from marina facilities.

It may also reduce the need to run the vessel’s main propulsion engine solely for battery charging or domestic electrical production.

Continuous and Maximum Power Ratings

Understanding the difference between continuous and maximum output is important when selecting an onboard power system.

The Nanni QMS7.5M is rated according to ISO 8528-1, with 6.6 kW identified as continuous power and 7.5 kW as maximum power. Its normal sustained electrical demand should therefore be calculated primarily around the continuous rating rather than the higher maximum figure. (Nanni Diesel)

Equipment containing electric motors or compressors may require more electricity during startup than during normal operation. This applies particularly to refrigeration units, pumps, battery chargers, and compatible air-conditioning equipment.

An undersized generator may experience:

• Electrical overload
• Voltage instability
• Difficulty starting motor-driven equipment
• Excessive operating temperature
• Frequent protective shutdowns
• Reduced equipment life

However, installing a generator that is substantially larger than required may result in long periods of operation under very light load. A professional marine electrical load assessment helps establish the correct balance between capacity, operating reserve, and efficiency.

Stable 230V Single-Phase Electrical Output

The QMS7.5M is designed for vessels requiring dependable 230V single-phase marine power. Single-phase electricity is commonly used aboard recreational vessels for domestic systems, lighting, electronics, charging equipment, and small comfort appliances.

The generator may support compatible equipment such as:

• Battery chargers
• Refrigeration and freezer systems
• Navigation electronics
• Communication equipment
• Freshwater pumps
• Lighting circuits
• Entertainment equipment
• Small galley appliances
• Electrical outlets
• Vessel-monitoring systems

The generator uses Class H insulation, electronic voltage regulation, radio-interference suppression, and voltage accuracy of approximately ±1.5%. It is supplied with IP21 protection, with additional protection levels available on request. (Nanni Diesel)

Before installation, a qualified marine electrician should verify cable sizing, grounding, circuit protection, shore-power integration, and compatibility with the vessel’s distribution system.

Marine Cooling for Dependable Operation

Reliable cooling is essential for long-term marine generator performance. The Nanni QMS7.5M uses heat exchange between the internal engine coolant and seawater. A raw-water pump with a rubber impeller circulates seawater through the external cooling circuit. A keel-cooling configuration may also be suitable for certain vessel installations. (Nanni Diesel)

A properly maintained marine generator cooling system supports:

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

Routine inspection should include the coolant, raw-water strainer, seawater flow, hoses, clamps, drive belts, raw-water impeller, heat exchanger, and wet-exhaust components.

Restricted seawater flow, a worn impeller, blocked cooling passages, or inadequate engine-room ventilation can cause overheating even when the generator is correctly sized.

Practical Service Access

Nanni positions the QMS7.5M’s important maintenance components for practical inspection and servicing. Identified components include:

• Oil-drain pump
• Fuel-feed pump
• Fuel filter
• Expansion tank
• Seawater pump
• Oil filter
• Oil-filling point
• Exhaust elbow

This layout helps simplify routine oil changes, filter replacement, cooling-system inspections, and general preventive maintenance. (Nanni Diesel)

Easy service access is especially important aboard vessels where machinery spaces may be restricted. Before installation, sufficient clearance should be maintained around the generator so filters, belts, pumps, and other service parts can be reached without removing unrelated equipment.

Low-Speed Operation and Reduced Vibration

All 50 Hz generators in Nanni’s QMS range operate at 1500 RPM. Nanni states that this low-speed arrangement reduces noise and vibration while also limiting friction and mechanical wear. (Nanni Diesel)

Lower operating speed may contribute to:

• Smoother generator performance
• Reduced vibration transfer
• Lower mechanical wear
• Improved onboard comfort
• More suitable extended operation
• Longer equipment life with correct maintenance

A properly installed quiet marine generator should also include flexible mounts, correct ventilation, supported hoses and cables, and a professionally designed wet-exhaust system.

Final onboard noise depends on the complete installation. Hull construction, mounting quality, exhaust routing, sound insulation, and ventilation openings can all influence acoustic performance.

Optional Soundshield for Improved Comfort

The QMS7.5M is available with a sound enclosure designed to reduce airborne engine and alternator noise. Nanni states that sound-enclosed QMS generators can achieve sound levels around 54 dB at seven metres under specified testing conditions. (Nanni Diesel)

The enclosure places fuel, cooling, and electrical connections at the front, helping simplify installation and servicing. (Nanni Diesel)

Nanni’s published range information lists an approximate enclosed dry weight of 271 kg for the QMS7.5M. (Nanni Diesel)

Before selecting the soundshield configuration, the installer should confirm:

• Machinery-space dimensions
• Maintenance access
• Ventilation requirements
• Seawater connections
• Exhaust routing
• Fuel-line access
• Electrical cable access
• Lifting and removal clearances

Applications of the Nanni QMS7.5M

Sailing Yachts

The generator can provide dependable electricity for refrigeration, battery charging, navigation electronics, lighting, communication systems, pumps, and other essential cruising equipment.

Motor Yachts

The QMS7.5M may support compatible domestic systems, refrigeration, battery chargers, entertainment equipment, lighting, and smaller onboard appliances.

Cruising Catamarans

Its compact configuration makes it a practical catamaran generator for vessels requiring reliable single-phase electricity while operating away from marina facilities.

Liveaboard Boats

The generator can provide independent power for refrigeration, water pumps, battery charging, lighting, and domestic equipment during extended periods at anchor.

Professional Marine Vessels

The QMS7.5M may serve as a compact commercial marine generator for lighting, communication equipment, pumps, refrigeration, and routine operating loads.

Marine Refit Projects

The generator may be considered when replacing an older or unreliable unit, provided the vessel’s electrical demand, dimensions, cooling system, exhaust arrangement, and mounting requirements are compatible.

Technical Specifications of the Nanni QMS7.5M

The QMS7.5M is officially specified with 6.6 kW continuous output, 7.5 kW maximum output, 230V single-phase electricity, 50 Hz frequency, and 1500 RPM operation. (Nanni Diesel)

Genuine Nanni Generator Supply and Worldwide Support

Customers looking for the New Nanni QMS7.5M Marine Generator for sale can contact our marine specialists for current availability, technical guidance, configuration details, and international delivery assistance.

We support customers with:

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

Frequently Asked Questions

What is the Nanni QMS7.5M price?

The Nanni Generator Type QMS7.5M price depends on the selected configuration, soundshield, optional equipment, current availability, shipping destination, and delivery requirements. Contact our team for an updated quotation.

How much power does the QMS7.5M produce?

The generator provides 6.6 kW of continuous power and up to 7.5 kW of maximum power. (Nanni Diesel)

Is the QMS7.5M a single-phase generator?

Yes. It provides 230V single-phase marine power at 50 Hz. (Nanni Diesel)

What engine configuration does it use?

The generator uses a naturally aspirated, three-cylinder, four-stroke diesel engine with approximately 1,123 cm³ of displacement and 1500 RPM operation. (Nanni Diesel)

Is a sound enclosure available?

Yes. The Nanni QMS7.5M is available with a soundshield, with fuel, cooling, and electrical connections positioned at the front of the enclosure. (Nanni Diesel)

Can it replace an existing yacht generator?

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

Request a Quote for the Nanni QMS7.5M Marine Generator

The New Nanni Generator Type QMS7.5M Marine Generator is a dependable choice for yacht owners, boat builders, marine installers, and professional operators requiring compact single-phase marine power from a low-speed diesel generator platform.

Contact our marine generator specialists to request the latest Nanni QMS7.5M price, confirm availability, review installation requirements, and receive assistance selecting the correct generator configuration for your vessel.