Monterey 305 SS, Owner'S Manual

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57
MONTEREY
BOATS
6.1 General
Your boat is equipped with a 12 volt DC electrical
system and could be equipped with an optional
120 volt AC battery charging system. The battery
charger draws current from a shore power outlet
at dockside. The DC system draws current from
onboard batteries.
The boat and engine charging systems are designed
for 12 volt, lead acid wet cell or absorbed glass mat
(AGM) batteries. Most wet cell batteries will require
similar maintenance as those in automobiles. AGM
and some wet cell batteries are sealed and require
no maintenance except to periodically clean battery
tops, terminal posts and connections.
It is important that you know the type of batteries
in your boat and that the engine charging system
and optional battery charger are set to recharge
these batteries. Charging systems not set to the
proper battery type could cause unusually short
battery life, engine starting problems and damage
to the DC charging systems. You also should not
mix the brand or type of batteries.
The batteries in your boat were installed by the
dealer. They should be of the size and capacity
recommended by the manufacturer of your en-
gines. Labels on the battery cables indicate the
specifications for the batteries required to power
the house and engine electrical systems. See the
engine owner’s manual for more information on
battery requirements. These specifications should
be considered to be the minimum size battery
required.
Always consult your dealer before changing the
type of batteries in your boat or if you have ques-
tions regarding the batteries.
6.2 12 Volt DC System & Batteries
The 12 volt system is a standard twin engine
marine system. There are three batteries, one
for each engine and one for the house accessory
circuits and electronics. The batteries themselves
can be charged by the engines or the optional bat-
tery charger, when hooked to shore power.
An automatic battery isolator/relay (DVSR) man-
ages the charging current for the engine and
house batteries. The system is equipped with a
battery parallel feature that will connect both en-
gine starting batteries in parallel for extra battery
power while starting the engines.
Most 12 volt power is distributed to the accessories
through individual circuit breakers located in the
battery switch panel. Main breakers located near
the battery switches protect the main accessory
circuit, windlass and stereo amplifier. Other circuit
breakers or fuses protect the circuits for the bat-
tery charger DC circuits, stereo and electronics
memory, engine control memory, and automatic
switches for the bilge pumps. Fuses located on
each engine protect the ignition, charging systems
and gauges. Other fuses provided by the engine
manufacturer protect auxiliary charging circuits
and other engine related electronic controls. Refer
to DC Circuit Protection for additional information
on the circuit protection in your boat.
Some 12 volt accessories are operated directly by
a circuit breaker in the breaker panels while oth-
ers are operated by a switch fed by the breaker.
Most of the 12 volt accessories on the deck and in
the cockpit are operated by switches in the helm
switch panel.
Chapter 6:
Electrical System
Battery Location in Aft Storage Compartment