I-Series
I-Series Inboard Motors 10-40kW
Hydrogeneration Highly-integrated Compact Smart Connected
The I-Series delivers eco-friendly electric inboard motors enhanced with advanced technology, intelligent features, and a user-focused design. Powered by our highly modular ePropulsion Smart System Architecture (eSSA) and supported by IoT connectivity services, it provides an unmatched boating experience defined by simplicity, intelligence, safety, and reliability.

Powerful Electric Inboards for Larger Vessels
Compact yet robust, the I-Series electric inboard motors deliver clean, efficient, and whisper-quiet propulsion for a wide range of applications. Designed with OEMs and boat builders in mind, they simplify both new installations and the conversion of existing vessels to electric power. Equally suited to leisure cruising or commercial operations, the I-Series is an ideal solution for:
- Small to medium-sized boats
- Sailing yachts
- Multihull vessels
- Narrowboats
- Leisure powerboats
- Workboats, water buses, and ferry boats
Efficient
Clean
Quiet
Hydrogeneration

Features
The I-Series motors feature a streamlined design that consolidates five essential components into one compact unit: the motor, gearbox, motor controller, system control unit, and cooling system. This integration saves valuable onboard space, reduces wiring and system complexity, and makes installation faster and more efficient.
Designed for both boat builders and end users, the I-Series delivers a quiet, reliable, and space-efficient propulsion solution. Its versatility makes it an ideal choice for leisure craft, sailing vessels, multihulls, powerboats, and commercial applications where performance and efficiency are paramount.

Space-saving
With a design that requires 60% less space than traditional combustion engines, the I-Series motors maximise installation flexibility and free up valuable onboard space for passengers and equipment.
Lighter weight
Up to 65% lighter than combustion engines and 30% lighter than comparable electric inboards, the I-Series delivers significant weight savings that improve efficiency and handling.
Hydrogeneration
All I-Series models include integrated hydrogeneration, enabling the batteries to recharge from water flow while sailing for greater range and sustainability.
Easy to install
Pre-connected internal wiring creates a true plug-and-play setup, making installation straightforward and allowing immediate use upon delivery.
Easy to maintain
With advanced technology and simplified design, the I-Series requires far less maintenance than conventional engines, reducing downtime and operating costs.
Easy to operate
A unified throttle and display panel provide a seamless, user-friendly driving experience. The smart control system actively interprets operational input, making navigation effortless and precise.
eSSA: The Core of I-Series
Built on ePropulsion’s Smart System Architecture (eSSA), the I-Series inboard motors deliver a next-generation propulsion solution. Their intelligent, modular design enhances safety and reliability while enabling seamless integration with ePropulsion Connectivity Services and Advanced Driver Assistance Systems (ADAS) for a smarter, more connected boating experience.
Smart
Modular
Safe

Next-Gen Controls Powered by eSSA
Our Smart Throttle and 5-inch Smart Display deliver an exceptional user experience, combining intuitive control with real-time system monitoring. With three versatile mounting options, the Smart Throttle adapts seamlessly to different vessel layouts, ensuring the perfect fit for every application.
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Top or Side
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Single or Dual
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Port or Starboard
* Additional control options coming soon...

Seamlessly Connected through Boating IoT
Our ePropulsion Connectivity Service strengthens the link between boat owners, fleet managers, and their vessels. This value-added service enables secure, reliable data exchange and delivers cloud-based connectivity without requiring additional hardware.
Monitor real-time metrics including location, speed, battery level, and remaining charging time at a glance.
Receive instant alerts if your vessel crosses geofences, exceeds speed limits, or shows unusual movement.
Automatically record your journeys with detailed logs and route playback for every trip.
Provide others with shared access to real-time status, past activity, and detailed reports
Allow guests to power up and operate the ePropulsion system with configurable permission settings.
Automatically generate comprehensive reports and fleet summaries covering all boating activity.

G-Series Lithium Battery
The G102-100 is a high-performance Lithium Iron Phosphate (LiFePO4) battery engineered specifically for use with the I-Series inboards.

Competitive pricing
Unit price is as low as £0.50 per watt-hour.
High energy density
Longer life cycles
Made for ePropulsion Motors
Harness the Power of Hydrogeneration
All I-Series motors feature integrated hydrogeneration technology, enabling battery recharging via propeller-driven water flow under defined sailing conditions. This system improves overall energy efficiency, extends cruising range, and reduces reliance on shore-based charging infrastructure, underscoring ePropulsion’s leadership in advanced electric propulsion engineering.
- The I-10, I-20, and I-40 motors support hydrogeneration, recharging ePropulsion batteries through propeller-driven water flow under defined operating conditions.
- All hydrogeneration data is based on results from real-world testing.
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Specs
I-Series | |||
---|---|---|---|
I-10 | I-20 | I-40 | |
Input power | 10 kW | 20 kW | 40 kW |
Input voltage | 86 to 115 VDC | 86 to 115 VDC | 86 to 115 VDC |
Weight | 45kg | 49.5kg | 85kg |
Dimensions (L x W x H) | 565 x 295 x 380 mm | 580 x 330 x 380 mm | 790 x 450 x 410 mm |
Cooling method | Air cooling | Water cooling (air cooling optional) | Water cooling (air cooling optional) |
Rated rotational speed | 1500 rpm | 1500 rpm | 1000 rpm |
Operation and interaction | Throttle & display (standard) | Throttle & display (standard) | Throttle & display (standard) |
Connectivity service | Supported | Supported | Supported |
What's in the Box
Accessories
Downloads
Where to buy?
Please use our Dealer Locator to find your nearest stockist of the ePropulsion range.