|The Island Pilot DSe hybrid. Click to enlarge.|
Island Pilot, LLC will introduce a diesel-electric series hybrid production motor yacht at the Fort Lauderdale International Boat Show. The twin-hull Island Pilot DSe Hybrid 12m combines diesel, solar and electric power (the components of the DSe label).
Measuring 12 meters (39’6”), the DSe uses a pair of Steyr Motors Serial Hybrid Propulsion Systems—one in each hull—each consisting of a Steyr Monoblock 75 hp (56 kW) diesel with an inline 7 kW motor/5kW generator leading to the ZF Saildrive. A 20 kWh battery pack, distributed in the bows, comprises 48 vDC battery banks made up of AGM-style deep cycle batteries from Enersys.
In electric mode, the permanent-magnet motors provide all-electric, zero-emissions cruising speeds of up to 7 1/4 knots. The DSe requires a total of 6 kW to cruise at 6 knots and 10 kW to cruise at 7-1/4 knots.
The DSe hybrid can travel at up to 13 knots using the diesels. When the diesels are running, the motors become generators, supplying a charging current (10 kW total) for the battery arrays and the pair of 3.6 kW pure sine wave Outback inverters that supply the 120 vAC for air conditioning, cooking, entertainment, hot water and outlets.
The DSe Hybrid can run for up to 2 hours using only the battery bank. Diesel fuel economy at 7-knot cruise is up 10 NM/gallon at 7-knot cruise and 2.33 NM/gallons at 13-knot cruise.
The superstructure is designed to maximize the horizontal surface for the 6 kW photovoltaic solar array, which provides power for the support and amenities systems.
Steyr Motors and Frauscher Bootswerft introduced a diesel-electric hybrid propulsion system for pleasure boats at the Boot 08 show in Düsseldorf in January 2008. (Earlier post.)