IS ELECTRIC PROPULSION ALWAYS GREENER?

There’s no one-size-fits-all strategy for the most sustainable solution for a yacht’s auxiliary propulsion. The extra carbon emissions associated with manufacturing an electric car is often offset within 15,000 miles thanks to their impressive efficiency compared to internal combustion engine vehicles.

However a recent well publicised ICOMIA report found privately owned sailing yachts clock up an average of only 24 engine hours annually, so the carbon footprint associated with producing the battery pack is never recovered. The recommendation to minimise life cycle carbon emissions is therefore to use a second generation biofuel such as HVO, which is typically produced from biowaste material. These are very different to first generation biofuels, which were very hygroscopic and provided a fertile breeding ground for microorganisms that were prone to blocking fuel filters.

The equation is massively different for charter yachts and owners who spend considerable periods of time on board. An independent study commissioned by Fountaine-pajot showed that 80% of the yard’s carbon emissions stem not from manufacturing processes, but from the use of its yachts during only the first 20 years of their life. In this situation electric or hybrid propulsion is likely to make a very sustainable proposition.

Nevertheless, just as environmental considerations aren’t always a factor for owners of enormously powerful electric cars with 0-60mph acceleration times well under four seconds, a growing number of yacht buyers are opting for electric propulsion for reasons other than its apparent green credentials. Benefits include quiet, odour-free running, space savings, reduced maintenance, the ability to recharge batteries – effectively refuelling while sailing using only the wind – and a huge amount of torque at low speeds that can make difficult manoeuvres in tight spaces a lot less daunting.