
Vivace Boat Information Book Web Version (BIB) (Rev February 13, 2014)
Revision 6 Page | 41
Electrical System Information
Power Supply
Vivace has no shore power provisions.
All electrical power is provided by the engine driven 12 volt alternator.
Rectifiers integral to the alternator convert the alternating current produced by
the alternator to 12 volt direct current used by the batteries. The batteries power
all electrical components on the boat.
System voltage can be displayed on the Nexus Multi instrument as
described in the Instruments section, below. With the engine running (alternator
turning), system voltage will be indicated at about 13.6--8 volts. With the engine
stopped, battery voltage will vary from about 12.1 volts at near full charge to 11.5
volts after a typical house load over several hours. Engine starting has been
demonstrated at 11 volts.
Batteries
Power is stored in two identical sealed lead-acid absorbed glass mat (SLAB AGM)
batteries. These are dual purpose batteries providing desirable characteristics of
both quick discharge for engine starting and long duration deep discharge for
prolonged load. No user servicing is possible. These are considered to be very
safe batteries with a design that practically eliminates the possibility of hydrogen
explosion that can occur when wet cell batteries are mishandled.
The batteries are located under the quarter berth.
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