Skip to content
0

I-Series

Redefining the Electric Inboard Experience

  1. Home
  2. Products
  3. Inboard Engines
  4. I-Series

Popular with sailboats and small watercraft

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.

Price on request. Add the models you need to your quote basket and our team will reply with prices and availability.

Model
View quote basketFind a dealer
I-Series Inboard Motors

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

Medvolt Marine M7Medvolt Marine M7Chantier CPC LaPéniche SChantier CPC LaPéniche SIsloep Rapida 990Isloep Rapida 990Homebuilt CustomHomebuilt Custom

Compact and Integrated

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.

ePropulsion's Smart System Architecture

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.

  • Top or Side

  • Single or Dual

  • 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.

Remote Data Access

Monitor real-time metrics including location, speed, battery level, and remaining charging time at a glance.

Remote Monitoring

Receive instant alerts if your vessel crosses geofences, exceeds speed limits, or shows unusual movement.

Trip Tracking

Automatically record your journeys with detailed logs and route playback for every trip.

Shared Accounts

Provide others with shared access to real-time status, past activity, and detailed reports

Guest Authorisation

Allow guests to power up and operate the ePropulsion system with configurable permission settings.

Report Generation

Automatically generate comprehensive reports and fleet summaries covering all boating activity.

ePropulsion IoT Connectivity Service

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

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

Longer life cycles

Boasting an impressive 3,000 cycles at 80% State of Health (SoH).

Made for ePropulsion Motors

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

Learn more about the G-Series

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.

Specs

I-Series
I-10I-20I-40
Input power10 kW20 kW40 kW
Input voltage86 to 115 VDC86 to 115 VDC86 to 115 VDC
Weight45kg49.5kg85kg
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

What's in the Box

Accessories

Downloads

Find all the downloads for the ePropulsion I-Series electric inboard motor.