Which System and Which Propeller Should You Choose?
Over the past decade, hydrogeneration systems have been gaining popularity on our multihulls. While this is a clean and efficient way to recharge batteries, the technology behind it can be quite complex, notably when it comes to the propeller. Here are a few key points to help you better understand the technical aspects and get the most out of hydrogeneration.
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Published on 03/07/2025
By
Dominic Salander
Issue:
SP24
Published:
Sep.
/
Oct.
2025
What is Hydrogeneration?
Hydrogeneration involves using the movement of the multihull through the water to generate electricity, usually by turning a propeller connected to an alternator or a reversible motor. This can be a very efficient way of recharging batteries during long passages under sail. The first attempts at Hydrogeneration date back to the 1970s, but it was not until 20 years later that commercial solutions appeared, and finally in the 2000s that the boats’ engines themselves began to be used in reverse mode, i.e., when the motor isn’t actually running,…
