Weenav is bringing its KRONOS 300 electric outboard into the 2026 boat-show season with a headline figure intended to challenge the idea that battery propulsion is limited to low-power craft. The French company states that the motor can deliver 300hp continuously and reach a peak of 408hp, placing it firmly in the performance-boat conversation.
The unit forms the top of a KRONOS range spanning 80 to 300 continuous horsepower. That family approach is important because builders can potentially apply the same control philosophy and service structure across several boat sizes instead of treating every electric installation as a one-off engineering project.
Continuous output is the key claim
Electric motors can produce impressive short bursts, but sustained power is what matters when a boat has to hold speed for a passage. Weenav says the KRONOS 300 produces more than 300hp continuously, equivalent to about 220kW, while peak output rises to 300kW or roughly 408hp.
The company also publishes 752Nm of torque available from start-up. Instant torque can give electric drivetrains strong acceleration and low-speed control, but real-world performance still depends on propeller selection, battery discharge limits, boat weight and the cooling system’s ability to maintain output over time.
Battery technology is central to the package
Weenav links the motor with LFP-based battery technology and claims up to 6,000 cycles under its stated operating assumptions. The company also highlights recyclability and the thermal stability associated with lithium iron phosphate chemistry, positioning durability and safety alongside outright power.
For yacht owners, battery capacity remains the more practical question because a powerful motor can consume stored energy very quickly when used near maximum output. The installation therefore has to be assessed as a complete propulsion system, including usable battery capacity, reserve strategy, cooling and the owner’s normal cruising speed rather than only the motor’s peak figures.
Charging is designed for both marina and rapid systems
The KRONOS package supports a 22kW onboard charger and rapid charging at up to 200kW through a CCS connection, according to Weenav. That creates two distinct operating modes: routine charging from more common shore infrastructure and much faster replenishment where high-power DC equipment is available.
The second option could make electric performance boating more practical on routes with suitable charging, but infrastructure remains uneven between marinas. Owners need to map where the yacht will actually operate and what electrical supply is available before assuming that a theoretical rapid-charge capability will translate into short turnaround times in every cruising area.
Fewer moving parts may reduce routine servicing
Weenav emphasises the simplified mechanical architecture of an electric motor compared with internal combustion and states that the first major service interval is scheduled after 5,000 hours. Removing oil systems, fuel delivery and many reciprocating components can reduce some routine maintenance tasks, although the battery, cooling system and high-voltage connections introduce their own inspection requirements.
That shifts rather than eliminates technical responsibility. Owners and yards need technicians comfortable with high-voltage systems, insulation monitoring and battery diagnostics, particularly as electric drivetrains become more powerful and move into boats capable of sustained high-speed operation.
The market question is endurance, not acceleration
A 300hp electric outboard can make a strong demonstration because acceleration is immediate and operation is quiet. The ownership decision is more complicated: a buyer wants to know how far the boat can travel at realistic cruising speeds, how much range remains in poor weather and how quickly energy can be replaced at the destinations they actually visit.
That means boatbuilders integrating KRONOS will have to publish complete performance curves rather than isolated maximum figures. Efficient hulls are likely to benefit most because every reduction in hydrodynamic drag makes stored battery energy go farther and can reduce the battery mass required for a given mission.
High-power electric outboards are moving toward production use
The KRONOS 300 demonstrates how quickly electric marine propulsion is moving beyond harbour manoeuvring and low-speed day boats. A scalable 80-to-300hp family gives designers another option for new yachts where quiet operation, local emissions and simplified mechanical layouts are important design priorities.
Its success will ultimately depend on installed boats accumulating reliable service hours and owners finding charging convenient enough for normal use. The power figures attract attention, but range, battery life, service support and the cost of a complete system will decide whether KRONOS becomes a regular specification rather than a specialist alternative.
