Electric propulsion is not a universal replacement for a diesel engine. It is a project that must match the hull, navigation profile, available energy, and the crew's actual expectations. The question "Electric Propulsion, why and how?" therefore begins with an analysis of your vessel, not with selecting a motor from a catalog.
Why Choose Electric Propulsion?
On a sailing yacht, day boat, or vessel mostly operating on short routes, electric propulsion can reduce noise, vibrations, and routine mechanical maintenance. Combined with an appropriate battery system, chargers, and solar production, it provides greater energy autonomy in port and during maneuvering.
However, autonomy at higher speeds is not comparable to that during economical cruising. The required power rises sharply with speed, especially for displacement hulls. Therefore, the declared battery capacity alone is not a parameter on which safe navigation can be planned.
Electric Propulsion: How to Choose the System
Proper sizing begins with assessing hull resistance and the power needed at the desired cruising speed. Then we examine space, weight, weight distribution, existing propulsion components, the propeller, and cooling capabilities.
Equally important are the battery pack, BMS, shore charging, DC-DC converters, solar regulator, and system monitoring. For higher voltage systems, special attention is required for short circuit protection, insulation, correctly sized cables, main switches, and the ability to safely disconnect in emergencies.
Replacing a diesel engine with electric propulsion is not always the best choice. For vessels with long engine legs, a hybrid solution, generator, or retaining the existing propulsion may be more functional and realistic.
At UnLucky, we consider electric propulsion as part of a comprehensive energy system. Technical compatibility checks, design, installation and integration, configuration, and commissioning reduce risks of compromises that later manifest as limited range, overheating, or unpredictable charging.
Send an inquiry with vessel data, current propulsion, and intended usage plans.
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