After months of engineering and design work, we were able to test an Alerion Express 33 with a Mastervolt Lithium-Ion electric saildrive system. The application of this technologically advanced propulsion system was spurred by a customer who did not want to spoil the quietness of the intimate, nature-filled waters he prefers for sailing near his home in Vancouver, Canada. His query whether the diesel saildrive, which is standard in this model of Alerion, could be replaced with electric propulsion resulted in this launching. The experience of motoring this boat has been described as “Astonishing” by boat reviewers, dealers and sailors of all stripes.
Underway, even at full speed, the only noise on board is the rustle of wind, the slap of crossing another boat’s wake or crew conversations. Said one reviewer, “I didn’t realize we were under power until I noticed our wake and saw moored boats passing us! It took time to adjust my behavior, throttling back when underway – because there is no spooling up noise of a diesel.” A marine electronics writer, measuring dB readings on deck and below with a sophisticated sound meter, could detect no motor noise. The electric-drive mated with Mastervolt’s 7.5 kW saildrive system, their MLI 24/160 Li-Ion battery on a single charge gives the AE33 approximately 20 nautical mile range – which can be greater or less depending on speed, number of crew, wind and weather conditions. Installing additional MLI 24/160 packs, which are relatively small and lightweight, permits those who might face longer motoring situations to still use this system.
Check out this short video to learn more.
[youtube=http://www.youtube.com/watch?v=Gh-zNZ_M7Dw]