Electric boat: real costs, maintenance and profitability under 10 years
Are you hesitating to make the leap to electric? Discover the concrete figures that will transform your view of maritime investment
The transition to electric propulsion is no longer just an ecological trend, it is a strategic economic decision. With the continuous rise in fuel prices, increasingly strict environmental regulations and skyrocketing maintenance costs, shipowners, fleet managers and individuals are seeking concrete answers to an essential question: how much does an electric boat really cost over 10 years?
At Weenav, we support the electric transition of boating with our KRONOS and ARION motors. The data is clear: profitability is no longer a question of "if", but "when". Here is everything you need to know before making your decision.
Weenav solutions: KRONOS and ARION, two ranges for all your needs
KRONOS: The 100% electric outboard motor from 80 to 300 hp
The KRONOS represents the future of outboard propulsion. Designed and assembled in France, this electric motor offers impressive performance for all types of vessels.
Technical specifications KRONOS:
- Available power: from 80 to 300 horsepower
- Maximum couple from the start
- Operation from 400V to 800V
- Specific embankment: designed to absorb electrical power
- Fast charging: Compatibility: CCS Combo (up to 200 kW), charging up to 2C (from 10% to 90% in 30 minutes)
- Waterproofing: Marine certified IP67
- Interface: control developed with Garmin for optimal management
KRONOS Price (excluding batteries):
- 80 hp : 39 900 €
- 110 hp : 46 900 €
- 150 hp : 58 200 €
- 200 hp : 67 900 €
- 250 hp : 69 900 €
- 300 hp : 79 900€
Applications KRONOS:
- Passenger transport and shuttles
- Professional boats (fishing, aquaculture, port services)
- Recreational activities (water skiing, wakeboarding, towable tubing)
- Tenders with a need for rapid recharges
- Fleets in sensitive areas (urban water bodies, reserves, lakes)
Concrete example: On a Capelli Tempest 770 equipped with a KRONOS 200 hp with 26 battery modules (140 kWh at 689V), you achieve a maximum speed of 35 knots
ARION: The powerful and discreet inboard engine from 100 to 1000 hp
Le ARION est notre solution inboard pour les bateaux de moyenne et grosse envergure, disponible en configuration 100% electric or hybrid (series/parallel).
Technical specifications ARION :
- Available power: from 100 to 500 hp in single, up to 1000 hp in double installation
- Energy efficiency: Up to 97% efficiency
- Configuration: compact and lightweight engine to optimise onboard space
- Lifespan: designed for over 30 years of navigation
- Maintenance: first significant maintenance after 10,000 hours of navigation
- Torque: superior to thermal engines for all navigation conditions
- Versions: 100% electric, series hybrid or parallel hybrid
ARION 100% electric price (excluding batteries) :
- 100 hp: 30 417 €
- 200 hp: 45 750 €
- 500 hp: 74 917 €
ARION applications :
- Passenger transport (fast boats, water buses, shuttles)
- Excursion boats and tourist cruises
- Luxury boats and private yachts
- Freight transport and river logistics
- Service and professional boats
- Navigation in inland and maritime waters
The hybrid option: If you wish to retain a thermal component (diesel, hydrogen, biogas) according to your needs, the ARION can be coupled with your traditional engine. This reduces noise, vibrations, odours and consumption while navigating in areas where thermal is restricted.
Detailed comparison: electric vs thermal over 10 years
Energy costs: the overwhelming advantage of electric
Diesel thermal boat :
- Average consumption : 10 *to 50 litres/hour depending on power and speed
*10 L/h corresponds to a low power boat
- Price of marine diesel :
- Forecast 2025-2026 : 1.70 to 2.00 €/litre
Note : this is not a general rule for professionals, some offers may vary
- Hourly cost (8m boat, 150 HP at 10L/h) : 17 to 20 €
- For 300 hours/year : 5,100 to 6,000 €/year
- Over 10 years : 51,000 to 60,000 €
Electric boat Weenav KRONOS/ARION :
- Average consumption : 15 to 30 kWh/hour depending on power and speed
- Electricity price : 0.10 to 0.20 €/kWh (standard rate + fast charging)
- Hourly cost : 3 to 7.50 €
- For 300 hours/year : 900 to 2,250 €/year
- Over 10 years : 9,000 to 22,500 €
Fuel savings over 10 years : 28,500 to 51,000 € for standard use !
For professional fleets with 1,000h/year of use, savings reach 95,000 to 170,000 € over 10 years.
Maintenance : the silent revolution
Thermal boat maintenance (average annual costs)
Mandatory preventive maintenance :
- Oil change and engine oil replacement : 200 to 400 €
- Filter replacement (air, fuel, oil) : 150 to 300 €
- Cooling system check : 100 to 200 €
- Injection system and spark plug check : 100 to 200 €
- Propeller shaft and seal maintenance : 150 to 300 €
- Complete engine overhaul (every 5-7 years) : 1,000 to 3,000 €
- Average annual maintenance cost: 800 to 1,500 €
Common breakdowns (unexpected):
- Water pump: 150 to 400 €
- Cooling system repair: 300 to 800 €
- Turbo or injector replacement: 500 to 1,500 €
- Electrical problems alternator/starter: 200 to 600 €
Total thermal maintenance cost over 10 years: 10,000 to 20,000 €
Maintenance of Weenav KRONOS & ARION electric motors
The revolutionary finding:
- No oil change
- No oil filter change
- No spark plug
- No complex cooling system
- No timing belt
Actual maintenance:
- Visual inspection and cleaning of connections: 100 to 200 €/year
- Control of the electronic system (software update): minimal
- First ARION maintenance: after 10,000 hours (approximately 500,000 € fuel savings)
- First KRONOS maintenance: after 10,000 hours
- Average maintenance cost: about 500 € every 20,000 hours for ARION
- Realistic total annual cost: 150 to 300 €
Over 10 years: 1,500 to 3,000 €
Maintenance savings over 10 years: 7,000 to 17,000 €
Batteries: the strategic investment
The Lithium Iron Phosphate (LiFePO4) batteries powering our systems offer exceptional performance.
Weenav battery specifications:
Lifespan: 3,500 to 7,200 charge cycles 6,000 full discharge recharge cycles
- Real lifespan: 20 to 30 years with optimal management
- Discharge depth: up to 80-100% without major degradation
- Protection: waterproof IP67
- Integrated BMS: automatic management for maximum longevity
- Self-discharge: very low compared to previous technologies
Probability of replacement within 10 years: very low with optimised use. With over 6000 cycles, even with 150 cycles per year (intensive use), you exceed 23 years of lifespan.
Our batteries are designed to last as long as your boat. With an efficient BMS and intelligent management, they represent a long-term investment.
The invisible but very real benefits
Beyond the pure numbers, electrification with Weenav KRONOS and ARION motors brings often underestimated benefits in profitability calculations.
Image value and competitive advantage
For marine professionals, switching to electric also means:
- +15 to 25% commercial attractiveness to a clientele sensitive to environmental issues
- A strong differentiation in increasingly competitive markets
- A value-adding communication: "zero-emission fleet", "silent navigation", "concrete environmental commitment"
- A better positioning in public and private tenders incorporating CSR criteria
Access to regulated areas… and anticipation of future standards
Regulation is evolving rapidly:
- Low emission zones (LEZ) for rivers and ports
- Access restrictions for internal combustion engines
- Limiting noise pollution in tourist and natural areas
An electric boat anticipates these developments, avoids future compliance costs and ensures long-term operational continuity.
Onboard comfort and user experience
Electric transforms the boating experience:
- Total silence, without vibrations or smells
- Smoother and more enjoyable navigation
- Better comfort for passengers, crews and local residents
- Reduced fatigue for professionals working long operational days
Increased comfort also means better customer loyalty and more positive feedback.
Overall profitability over 10 years: the verdict is clear
By combining:
- The energy savings (up to €170,000 for a professional fleet)
- Maintenance savings (up to €17,000)
- The exceptional longevity of engines and batteries
- The financial aids (CEE, PAMI, territorial schemes)
- And indirect commercial benefits
Electric propulsion is not only becoming profitable but strategically essential.
The question is no longer « is it profitable? » But rather: how much longer can you afford to stay with thermal?
Weenav, your partner in electric transition
At Weenav, we do not just sell engines. We support a complete transformation of your navigation model :
- Personalised technical and energy study
- Engine and battery sizing (KRONOS / ARION)
- Support for financial aid (CEE, PAMI, institutional partnerships)
- Integration, monitoring and long-term optimisation
Do you have an electric remotorisation project?
Contact Weenav for a personalised study and find out how much your transition can really cost you… after aid and CEE.
The navigation of tomorrow is already here.
Silent, efficient and profitable.
Published on: 23/12/2025
Editor: Sophie Castelain