Battery Charger; Battery Isolator; Battery Switches - Regal 3760 Owner's Manual

Each battery circuit uses a battery switch that provides a
positive battery disconnect, isolates all circuits and
protects against the hazards of electrical fire and
explosion.
At dockside a battery charger takes the place of the
engine's alternator to produce direct current.
The shore power cord sends house current through the
battery charger and it is converted to direct current and
charges the batteries through the battery isolator just as
through the engine alternators. In this scenario the main
distribution battery charger switch needs to be activated
for the current to flow through to the ship's batteries.
Also, the optional generator away from the dock can send
house current through the battery charging system and in
turn charge up the ship's batteries as needed.
Direct current circuit protection is located in several areas;
dash, AC/DC distribution panel and engine.
The engine resetable breaker powers the key switches as
well as the dash gauges. It does not control the dash
switches such as the blower, bilge pump, etc. Refer to the
engine manufacturer's owner manual for location and
particulars regarding the engine breaker.
Refer to the technical chapter for specific wiring
schematics. Following is a brief description of selected
DC components and general information regarding them.

BATTERY CHARGER

breaker need to be energized for the batteries to be
A battery charger is located in
the engine room. Its function
is to keep the main engine and
house batteries fully charged to
provide engine starting power
and house DC circuit
workability. The battery
charger operates on 120 volt
AC shore power or optional
generator power to provide the
AC source for the battery
charger to function. The main
AC and the battery charger
charged. The engine starting batteries used on this
vessel are separate from the house battery as a safety
feature. The battery parallel switch can be depressed and
it will use the charged up battery to start each engine.
See the dash illustration in chapter 4 for the parallel switch
location. If the engine batteries are discharged the house
battery will still allow the engines to be started. Once the
engines are started the alternators can then be used to
charge the engine batteries. It is critical to consider the
warnings on carbon monoxide if the engines are run to
charge the electrical system.

BATTERY ISOLATOR

checking for fastener tightness.

BATTERY SWITCHES

Stbd. Engine
Port Engine
House
"deep cycle" battery. The deep cycle battery normally
features heavier plates than the engine starting batteries.
2
Chapter 5
On your vessel a battery
isolator automatically senses
the charge needed by a specific
battery and then sends current
until that battery is fully
charged. The isolator features
a "gate" that senses when the
battery is charged and won't
allow current to discharge back
through the system. The
battery isolator requires no
periodic care other than
There are 3 battery
switches on the
vessel. Two of them
are used for each of
the engine starting
b a t t e r i e s.
remaining switch
marked master is
used for the house
The