Mentioned in www.barchemagazine.com -EN
Hytem E-PS joins existing engines both for sailboats and for motor boats, but it differs from all the others. It’s suitable for “Green” propulsion, but also for sailing in port or in roadsteads.
by Niccolò Volpati
Who says an engine can only have one function? Hytem E-PS is an electric engine for propulsion that can serve also as maneuvering thruster. It is telescopic and it completely looks like a retractable bow thruster, since it goes down and pushes.
It serves as auxiliary electric propulsion, ideal if one wishes to access a Marine Protected Area, or for a sailboat which sails in waters where endothermic propulsion is forbidden, like for example the North of Garda Lake and many other European lakes.
Moreover, it can be used also during docking phase because, and this is an absolute peculiarity, not only it is retractive, but it can rotate up to 360° and therefore it proves to be perfect during approach to a pier or a buoy.
Is that all? Of course not, because E-PS is not an engine meant to replace a diesel or a fuel engine already present on board. It’s an additional electric engine which makes any boat a hybrid, being a boat that carries two motors, one diesel or fuel and an electric one.
Installation only requires to pierce the hull with a 20x20cm hole and to have available 70cm in height. In fact, the tunnel necessary when the engine goes up and gets back into the hull is indeed 70 cm long, so the internal space of the navigation console is big enough, as well as the pilot seat.
Should you worry about piercing the hull? Not at all, because the system comprises two plugs: one locks the hull when the engine is inactive and another closes the hull when the propeller is plunged in water.
In case of impact with the seabed the upper plug maintains the hull closed. The crankshaft always remains within the hull and this assures no risk of tangling of ropes, halyards or other anchors’ chains.
It doesn’t even need too much electricity to work. In fact, being an auxiliary engine, its consumption is limited and the charge obtained through the electric column when it goes back into the dock, could be just fine.
Concerning the batteries, Hytem’s advice is to double the existent ones in order to always dedicate one battery to the endothermic engine ignition. There’s no need to seek for lithium type, which are quite expensive. Two classic AGM are suitable for making E-PS work, or alternatively, solar panels.
E-PS is available in two variants, one of 5kW whose price is about 15.000€, ideal for boats more than 10 meters in length, and a smaller one of 2kW which serves for hulls between 7 and 10 meters of length, whose price is 13.000€.