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Redefining the Electric Inboard Experience
Popular with sailboats and small watercrafts

I-Series Inboard Motors 10-40kW

Hydrogeneration Highly-integrated Compact Smart Connected

The I-Series offers eco-friendly electric inboard motors, enriched with cutting-edge technology, intuitive features, and user-friendly design. Supported by our highly modular ePropulsion Smart System Architecture (eSSA) and IoT connectivity services, it delivers an unparalleled experience in terms of ease of use, intelligence, safety, and reliability.

Electric inboards for larger boats

Remarkably compact, these state-of-the-art inboard motors provide a clean, efficient, and silent boating experience. Tailored for OEMs and boat builders, they facilitate effortless installation and conversion of existing yachts to electric propulsion. Perfectly suited for both leisure marine activities and commercial work, the I-Series motors are compatible with:

  • Small to medium-sized boats
  • Sailing yachts
  • Catamarans
  • Leisure powerboats
  • Workboats, water buses, and ferry boats





Compact and Integrated


Featuring a streamlined design, the I-Series motors ingeniously combine five essential components into a remarkably compact unit. These include the motor itself, a gearbox, a motor controller, a system control unit, and a cooling system.

This integration not only conserves valuable space but also simplifies the installation process, making it an ideal choice for a wide range of marine applications.


With a design that takes up 60% less space than traditional combustion engines, our I-Series motors offer enhanced installation flexibility and free up valuable payload space.

Lighter weight

At 65% lighter than conventional combustion engines and 30% lighter than comparable electric inboards, our I-Series motors offer a significant weight advantage.


All I-Series models feature a built-in hydrogeneration function, allowing you to capture electricity whilst sailing.

Easy to install

Pre-connected internal wiring ensures an out-of-the-box experience, facilitating immediate use upon delivery.

Easy to maintain

Thanks to advanced technology and thoughtfully designed interfaces, our I-Series motors require considerably less maintenance than traditional combustion engines.

Easy to operate

The unified throttle and display panel offer a seamless, intuitive driving experience. Our smart system is designed to actively understand the user's operational intentions, making control effortless.
ePropulsion's Smart System Architecture

eSSA: The Core of I-Series

Built on the foundation of ePropulsion's Smart System Architecture (eSSA), the I-Series inboard motors offer a cutting-edge solution. Their intelligent, modular design ensures both safety and reliability while also facilitating seamless integration with ePropulsion Connectivity Services and Advanced Driver Assistance Systems (ADAS).




Next-Gen Controls Powered by eSSA

Our Smart Throttle and 5-inch Smart Display offer an unparalleled user experience in both control and monitoring. With three flexible mounting options, the Smart Throttle can be easily adapted to suit your boat's specific needs, ensuring an optimal fit every time.
  • Top or Side
  • Single or Dual
  • Port or Starboard
* More control methods are coming...

Seamlessly Connected through Boating IoT

Our ePropulsion Connectivity Service enhances communication between boat owners, fleet managers, and their vessels. This value-added service allows for secure and reliable data exchange, providing cloud-based connectivity without the need for extra hardware.
Remote Data Access
Monitor real-time metrics like location, speed, battery level, and remaining charging time at a glance.
Remote Monitoring
Receive instant notifications if your boat breaches geofences, exceeds speed limits, or undergoes unusual location changes.
Trip Tracking
Automatically log your boating trips, complete with route playback and detailed trip records.
Shared Accounts
Grant others shared access to real-time statuses, past activities, and comprehensive reports.
Guest Authorization
Enable guests to power up and operate the ePropulsion system, with configurable permission settings.
Report Generation
Automatically compile individual boat reports and fleet summaries to encapsulate all your boating activities.
ePropulsion IoT Connectivity Service

G-Series Lithium Battery

The G102-100 battery is a high performance Lithium Iron Phosphate Battery (LiFePO4) designed especially for the I-Series inboards.

Competitive pricing

Unit price is as low as £0.50 per watt-hour.

High energy density

70% less weight and space than standard lead-acid batteries.

Longer life cycles

Boasting an impressive 3,000 cycles at 80% Depth of Discharge (DOD).

Made for ePropulsion Motors

The batteries share data with our motors, optimising performance and efficiency.

Hydrogeneration Empowers Sailors

All I-Series motors come equipped with a hydrogeneration function, enabling you to harness electricity directly from both wind and water. As a leader in the field, ePropulsion continues to pioneer groundbreaking innovations in electric outboard motor technology.
  • The I-10, I-20 and I-40 motors have the capability to charge ePropulsion batteries by utilising water flow to drive the propeller, provided certain conditions are met.
  • The hydrogeneration statistics are derived from actual tests conducted.


I-10 I-20 I-40
Input power10 kW20 kW40 kW
Input voltage86 to 115 VDC86 to 115 VDC86 to 115 VDC
Dimensions (L x W x H)565 x 295 x 380 mm580 x 330 x 380 mm790 x 450 x 410 mm
Cooling methodAir coolingWater cooling (air cooling optional)Water cooling (air cooling optional)
Rated rotational speed1500 rpm1500 rpm1000 rpm
Operation and interactionThrottle & display (standard)Throttle & display (standard)Throttle & display (standard)
Connectivity serviceSupportedSupportedSupported

Where to buy?

Please contact us on the following form for more information about the I-Series range of motors.