I-Series Electric Inboard Motor
ePropulsion I-Series is an environmental-friendly electric inboard motor series packed with innovative technology, smart features and human operation design. Underpinned by the highly integrated and modular ePropulsion Smart System Architecture (eSSA) and the IoT connectivity service, it provides users with an easy-to-use, intelligent, safe and reliable experience unlike any other.

Electrification of KSSS Pass Boat Häftig Featuring ePropulsion I-20 Inboard & G Batteries
ePropulsion converted the KSSS pass boat Häftig, known as Baljan, into an electric vessel with twin I-20 inboards, 4 x G102 batteries, and a 15 kW charger for transporting guests in the Stockholm archipelago. Operating a fixed route of over 1 NM between three piers, Baljan runs one trip per hour. In its first season, the boat achieved 273 hours of operation, covered over 600 NM, and saved 900 liters of diesel, reducing CO2 emissions by approximately 2.4 tons.
Bring Sustainable Solutions to the Waterways of France

ePropulsion converted the KSSS pass boat Häftig, known as Baljan, into an electric vessel with twin I-20 inboards, 4 x G102 batteries, and a 15 kW charger for transporting guests in the Stockholm archipelago. Operating a fixed route of over 1 NM between three piers, Baljan runs one trip per hour. In its first season, the boat achieved 273 hours of operation, covered over 600 NM, and saved 900 liters of diesel, reducing CO2 emissions by approximately 2.4 tons.
Features

Compact and Integrated
A compact design that integrates five functional modules of motor, gearbox, motor controller, system control unit and cooling system into a very small space.
Space-saving
Take up 60% less space than typical combustion engines and greatly reduce the machine size*, providing installation flexibility and maximizing payload space for you.
Lighter weight
65% less weight than typical combustion engines and 30% lighter than electric inboard motors of similar range.*
Easy to install
Internal wiring has been connected before delivery, providing you with an out-of-the-box experience.
Easy to maintain
The technology and the design of the interfaces significantly lower the maintenance required than combustion engines.
Built
- Smart
- Modular
- Safe and Reliable


New Generation Controls under eSSA
The Smart Throttle and Smart Display 5″ provide excellent user experience in controlling and monitoring. The Smart Throttle supports 3 mounting options for flexible installation. You could always find a best fit for your boat.
- Top or Side
- Single or Dual
- Portside or Starboard
* More control methods are coming…
Integrated with boating IoT

Remote data access
You can check all real-time data, such as location, speed, battery level, remaining charging time, etc.
Remote monitoring
Notify users when boats break geofences, exceed speed limits and have suspicious location changes.
Trip tracking
Automatically create boating trips with route playback and trip log.
Shared accounts
Invite other people to share access to real-time status, past activities and reports.
Guest authorization
Remotely authorize guests to power on and operate ePropulsion system with limited permissions.
Report generation
Automatically create boat reports and fleet reports to summarise all boating activities.
Specs
Model | 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 | Support | Support | Support |
Battery

- Fully Compatible with I-Series Inboards
- Safe and Reliable
- High Energy Density
- Long Life Cycle
What's in the Box

I-10 Inboard Motor x 1

ESSA Communication Extension Cable 10m x 1

ESSA Communication Cable 1m x 1

5-way T connector x 1

3-way T connector x 1

120Ω Communication Terminator x 1

360Ω Communication Terminator x 1

G Battery Output Cable Kit 5m (Positive & Negative) x 1

Bus Box 250A x 1

Warranty Card

Quality Certificate

User Manual

Invitation Card

I-20 Inboard Motor x 1

ESSA Communication Extension Cable 10m x 1

ESSA Communication Cable 1m x 1

5-way T connector x 1

3-way T connector x 1

120Ω Communication Terminator x 1

360Ω Communication Terminator x 1

G Battery Output Cable Kit 5m (Positive & Negative) x 1

Bus Box 250A x 1

Warranty Card

Quality Certificate

User Manual

Invitation Card

I-40 Inboard Motor x 1

ESSA Communication Extension Cable 10m x 1

ESSA Communication Cable 1m x 1

5-way T connector x 1

3-way T connector x 1

120Ω Communication Terminator x 1

360Ω Communication Terminator x 1

G Battery Output Cable Kit 5m (Positive & Negative) x 1

Bus Box 250A x 1

Warranty Card

Quality Certificate

User Manual

Invitation Card
Accessories

Propeller

Smart Display 5"

Smart Throttle
HVAC System
Air-cooling
Shaft and Coupling
Charger
FAQ
No, the third-party batteries cannot power I-Series motor.
The motors cannot receive real-time battery data or implement optimal performance strategies with non-ePropulsion batteries.
Our eSSA system is specifically engineered to monitor and manage all system components seamlessly. With third-party batteries, the system cannot respond to battery events, forcing reliance on the battery’s own power management. This creates unpredictable effects on motor performance and safety.
While third-party batteries may technically meet the 96V platform requirement, they cannot guarantee safe system integration and risk management.
ePropulsion’s I Series motors are relatively low maintenance compared to traditional combustion engines. However, there are still a few key things to keep in mind:
Battery Care: To maximize battery lifespan, avoid fully depleting it regularly. It’s recommended to charge the battery when it drops to about 20-30% capacity.
Cleaning: After use in saltwater, any exposed parts with fresh water to remove salt and debris.
Check for Wear: Periodically check the propeller, battery, and motor for any signs of wear or damage.
Yes, ePropulsion offers various accessories to enhance the functionality of the I Series motors, including:
External Batteries: For extended range and longer trips.
Battery Chargers: Fast chargers and standard chargers.
Mounting Brackets: For different boat configurations.
Control Systems: Handheld remotes or control panels to monitor battery life, speed, and performance.
The I-10 is air cooled.
The I-20 and I-40 are both water cooled and have the option for air cooling as well.