The Last Motor You Need
Discover STOK Electric’s high-performance electric inboard motors for yachts, ferries, and workboats—quiet, efficient, low-maintenance, and ideal for sustainable marine propulsion.
The Last Motor You Need
STOK Electric’s inboard motor series offers a clean, high-performance alternative to traditional marine propulsion. Engineered with system integration, reliability, and ease of use at its core, our electric boat motors are designed to meet the demands of both recreational and professional applications.
With pre-connected internal wiring and integrated components on the motor, installation is quick and simple. This plug-and-play solution reduces setup time, ensuring seamless integration with your vessel.
With fewer moving parts than combustion engines, our motors require minimal maintenance. Enjoy more time on the water with a reliable system built for long-term durability and minimal upkeep.
Our direct-drive system eliminates the need for a reduction box, improving efficiency and reducing mechanical complexity. Experience smooth, quiet, and highly responsive propulsion, enhancing your boating experience.
Recharge your batteries while sailing with our integrated hydrogeneration system. Convert kinetic energy into electrical power to extend your range, improving energy efficiency and reducing downtime.
Discover our range
Up to 11 kW
Voltage
48 V
Speed
1500 rpm
Up to 20 kW
Voltage
96 V
Speed
1500 rpm
Up to 30 kW
Voltage
96 V
Speed
1200 rpm
Up to 40 kW
Voltage
168 V
Speed
1500 rpm
Up to 60 kW
Voltage
358 V
Speed
1500 rpm
Up to 90 kW
Voltage
358 V
Speed
1500 rpm
Up to 130 kW
Voltage
563 V
Speed
1500 rpm
Up to 200 kW
Voltage
716 V
Speed
1500 rpm
Simplify Installation
STOK Electric’s electric inboard motor features a compact, space-saving design that integrates all essential components—propulsion motor, motor controller, DC-DC converter, cooling interface, and connectors, into one robust aluminium housing. Designed for quick installation, minimal wiring, and dependable performance in all marine environments.
Versatile solutions
Our modular electric drive systems suit a wide variety of vessels,from sailboats to work boats. We work with you to find the perfect solution, using proven configurations tailored to your needs
Efficiency Meets Innovation
| Model | EPM-10 | EPM-20 | EPM-30 | EPM-40 | EPM-60 | EPM-90 | EPM-130 | EPM-200 |
|---|---|---|---|---|---|---|---|---|
|
Cont. Power |
11 kW |
20 kW |
30 kW |
40 kW |
60 kW |
90 kW |
130 kW |
200 kW |
|
Peak Power |
15 kW |
30 kW |
45 kW |
60 kW |
80 kW |
120 kW |
160 kW |
240 kW |
|
Cont. Torque |
72 Nm |
118 Nm |
238 Nm |
254 Nm |
384 Nm |
570 Nm |
830 Nm |
1280 Nm |
|
Voltage |
48V |
96V |
96V |
168V |
358V |
358V |
563V |
716V |
|
Cooling method |
Liquid |
Liquid |
Liquid |
Liquid |
Liquid |
Liquid |
Liquid |
Liquid |
|
Rated rotational speed |
1500 rpm |
1500 rpm |
1200 rpm |
1500 rpm |
1500 rpm |
1500 rpm |
1500 rpm |
1500 rpm |
|
IP-Rating
|
IP65
|
IP65
|
IP65
|
IP65
|
IP65
|
IP65
|
IP65
|
IP65
|
Complete Solutions
Discover STOK Electric’s high-performance electric inboard motors for yachts, ferries, and workboats, quiet, efficient, low-maintenance, and ideal for sustainable marine propulsion.
Explore our products to find the perfect electric solution for your boat, or contact us to discover how STOK Electric can power your journey forward.
Understanding STOK Systems
A hybrid system combines an electric motor with a diesel engine or generator. It allows vessels to operate fully electric at low speeds and switch to diesel for extended range or high-power demands—offering flexibility, efficiency, and redundancy.
STOK Electric offers two configurations:
Parallel hybrid systems: 10–200 kW electric motor combined with diesel engines up to 900 hp.
Serial hybrid systems: electric propulsion only, powered by batteries and supported by generators up to 200 kW.
Parallel hybrid: Best for vessels needing high power and speed, like fast motorboats or commercial workboats. Combines diesel and electric for flexibility, fuel savings, and redundancy.
Serial hybrid: Ideal for low-speed or silent operation vessels such as ferries or sailing yachts. Uses a diesel generator to charge batteries, with only the electric motor driving the propeller, enabling efficient and quiet cruising.
Hybrid systems are ideal for motor yachts, commercial vessels, ferries, workboats, and even classic sailing yachts. They’re especially valuable for operators who need electric operation in ports or nature reserves, but also require long-distance capability.
Yes. Our hybrid systems are designed for seamless retrofitting. We offer full engineering support, from propulsion studies and space optimization to installation and commissioning. The compact and modular design simplifies integration into existing engine rooms.
For parallel hybrid systems, the electric motor typically provides between 30% and 50% of the diesel engine’s power required for nominal cruising speed. In serial hybrid systems, the generator is sized at approximately 40% to 50% of the electric motor’s power to efficiently meet the vessel’s nominal energy consumption.
Hybrid systems reduce fuel consumption, noise, and emissions. They offer silent electric cruising, lower maintenance costs, and more efficient energy use. For commercial fleets, this translates to significant operational savings and environmental compliance.
Yes. Our systems enable zero-emission operation in regulated areas. Whether fully electric or hybrid, we help ensure compliance with national and international standards, including ES-TRIN and upcoming emission regulations for inland and coastal vessels.
Our integrated control system makes switching seamless. Operators can choose the optimal mode manually or rely on smart automation based on speed, load, or battery state of charge—ensuring efficient and intuitive operation.
Battery charging can be done via shore power, onboard generator, or even solar. Our bidirectional converters allow flexible energy flow, making the system adaptable to your operational profile and available infrastructure.