GEAR NEW PRODUCTS
The electric motor
on this Steyr hybrid
can start the engine,
charge the batteries,
drive the boat or be
used in boost mode the diesel engine uncoupled
where additional
using a clutch. These systems
power is required.
may be equally relevant to sailing
boats, but for now are being
marketed more for narrow boats
where stowing large batteries is
not a problem.
You begin your day on
battery power, silently gliding
along through the water. When
the remaining battery capacity
reaches a preset level the diesel
starts automatically, providing
not only the motive power, but
also the high-capacity charging
needed for the next period
on battery power. When the
batteries reach 100 per cent
charge, the diesel shuts off and
you continue on battery power.
240V AC
Genset
POWER DISTRIBUTION FOR
without starting the diesel.
240V AC
THE LAGOON 420 HYBRID The main downside of a Power for a cat
Shore Power DC system is that the cabling
connecting generator, batteries Lagoon Catamarans has
Charger/Inverter
Domestic 240V AC
240 V AC/72V DC
and motors together must be designed a complete hybrid
pretty substantial. power system for its 420 that
DC/DC
For any given current, the uses an AC generator, an AC/DC
6 X 12V (72V) Converter
Batteries 72V/12V
12V Domestic higher the voltage, the lower the charger, substantial batteries
DC Batteries
cable size required. and 72V DC drive motors. The
Propeller
100% diesel-electric power
electric motors drive the boat
72V DC
partial diesel-electric power
Collaborations when battery capacity is between
Motor
(about 60% domestic, 40% propulsion)
100% battery power
Propeller generation
100 per cent and 80 per cent,
DC to AC inverter Now two marine engine at which point the generator
builders – Beta Marine starts automatically, switching
Above: Schematic of the hybrid
and Steyr – together off again when the batteries
power plant on the Lagoon 420
with bolt-on hybrid drive reach 100 per cent charge. In
catamaran. Electric motors cut
manufacturer Hybrid common with the Beta Marine
in when the battery capacity Marine, have gone one diesel/electric hybrid, this system
is between 80 and 100
step further with hybrid also offers reverse generation
per cent. Right: Hybrid
power units that from the propellers, as the
Marine’s bolt-on drive
incorporate a large DC DC motors effectively become
with large DC
motor/charger.
motor/charger. These dynamos when spinning under
systems retain direct sail. In practice, the batteries
diesel engine drive via the generally store enough electrical
propeller shaft, but offer energy to get the boat off the
the option of running moorings and then drive it for
on electrical power for short distances until the sails can
quite long periods with be hoisted.
Contacts
Beta Marine 01452 723492
www.betamarine.co.uk
FischerPanda 01202 820840
www.fischerpanda.co.uk
Hybrid Marine 01983 403236
www.hybrid-marine.co.uk
Steyr (Mermaid Marine) 01202 891824
www.mermaid-marine.co.uk
Lagoon Catamarans (Ancasta) 023 8045 0005
www.ancasta.com
July 09 Sailing Today 57
ST147
TechTalk_HybridrRTG.indd 53 15/5/09 12:26:40
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