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Chapter 4
The battery management system is an important ingredi-
ent of the 12 volt direct current (DC) system. The battery
management panel consists of 2 universal battery switch-
es along with relays, DVSR’s and 3 banks of DC breakers
plus the wiring itself. Refer to the battery management
information in this section and the technical chapter for
a breaker amperage listing. Be aware that in some cases
the breaker protects a component; in other cases it may
control a sub-panel or parts of a sub-panel.
The universal battery switch marked port/starboard con-
trols the engine cranking (starting) circuits.
Likewise, the battery switch marked house is part of the
“house” battery circuit. The port DVSR on the panel is
connected to the house circuit and the starboard DVSR
is integrated into the port and starboard engine cranking
circuits.
Remember that the remote battery switches and their
breakers also play a role in the battery circuitry. See the
earlier section regarding these components.
TYPICAL BATTERY MANAGEMENT SYSTEM-GENERAL INFORMATION
At this point let’s look at each of the components that
make up the battery management system and how the
entire system fi ts together and functions as a unit.
MANAGEMENT PANEL MAIN CIRCUIT
DC BREAKER CLUSTER
Port Cranking Battery- Controls Windlass Breaker
House Battery- Controls Cabin Main, Dash Main, and
Electronics Breakers
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