Hybrid Marine Propulsion Systems
Explore a more flexible approach to marine power with a hybrid propulsion system designed around your vessel and operating requirements.
Smooth Torque Marine assists vessel owners considering systems that combine diesel power, electric propulsion and onboard energy storage.
The right hybrid arrangement depends on how the vessel operates, the power required and where electric operation can provide the greatest practical benefit.
- About
Diesel and Electric Power Working Together
Hybrid propulsion combines conventional diesel power with an electric motor and energy storage system. Depending on the design, the vessel may operate on diesel power, electric power or a combination of both.
This can provide quieter low-speed operation, greater flexibility across changing power demands and reduced reliance on the diesel engine during suitable parts of the vessel’s operating cycle.
Hybrid systems must be matched to the vessel rather than selected as isolated components. Propulsion requirements, battery capacity, charging, controls, available space and weight all need to be considered as one integrated system.
Hybrid Propulsion Planning
- 01
Vessel and Operating Assessment
The process begins by understanding the vessel, its current propulsion arrangement and how it is normally used.
- 02
Hybrid Configuration
Series, parallel and other hybrid arrangements provide different ways to combine diesel and electric power. The suitable approach depends on the required range, speed and operating profile.
- 03
System Integration
The propulsion motor, diesel engine or generator, batteries, charging equipment, controls and monitoring systems must operate together reliably.
- 03
Testing and Commissioning
Once installed and integrated, the completed system requires testing and commissioning to confirm correct operation across its intended operating modes.
Is Hybrid Propulsion
Suitable for Your Vessel?
Hybrid propulsion may be worth exploring for vessels that operate across a mix of low-power and higher-power conditions, or where quieter operation and reduced engine use are priorities.
- Vessels with predictable operating cycles
- Workboats and commercial vessels with extended low-speed operation
- Cruising vessels seeking greater flexibility between power sources
- New builds where propulsion and energy systems can be planned together
- Existing vessels being considered for a broader propulsion upgrade
The benefits depend heavily on the vessel’s real operating profile. A technical assessment is the first step in determining whether a hybrid system is practical.
Hybrid Propulsion FAQs
What is a hybrid marine propulsion system?
It combines diesel power with electric propulsion and onboard energy storage, allowing the vessel to use one or both power sources depending on the system design.
Can an existing vessel be converted to hybrid propulsion?
Some vessels may be suitable for conversion, but available space, weight, propulsion layout, electrical capacity and operating requirements must first be assessed.
Will every hybrid vessel use less fuel?
Fuel use depends on the vessel and its operating profile. The potential benefit must be assessed against how and where the vessel normally operates.
What information is needed to begin?
Useful details include vessel type, dimensions, displacement, current propulsion, typical speed, operating hours, travel range and available technical drawings.
Discuss Hybrid Propulsion for Your Vessel
Tell us how your vessel operates and what you want to achieve from a hybrid propulsion system.