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4G3: DC Battery Chargers
The vessel is equipped with a 12-volt battery charger. It charges all the batteries,
although normally the inverter is left “On” to charge the normally-paralleled house and inverter
batteries.
The charger is switched on by its breaker in the 120-volt circuit breaker panel.
Note: The Inverter is primarily used for house battery charging; see
discussion about the inverter above!
4G4: DC Battery Switches
The boat is equipped with
battery switches mounted in the
engine room and at the main power
panels by the aft stateroom steps.
Battery switches for every
battery pupose except the thruster are
on the main panel, and an inverter
battery paralleling switch and inverter
main battery switch are on the upper panel.
Easily accessed from the engine room, these switches are also reachable through the
door under the companionway steps in the forward stateroom in an emergency.
Here is the purpose of each switch:
SWITCH
PURPOSE
Main Panel Switches
Inverter
Connects Inverter to the Starboard/House Bank
House
Connects house item breakers to Starboard/House Bank
Port Start
Controls supply to port engine from starting battery
Starboard Start
Controls supply to starboard engine from starting battery
Davit
Controls supply to dinghy davit
Genset
Turns generator battery on/off
Engine Room Switches
Bow Thruster (aft bulkhead stbd)
Connects Bow Thruster to Port/Thruster Battery
Webasto (fwd bulkhead stbd)
Connects Webasto to Batteries
Genset (above it to starboard)
Connects Generator to its Battery
Also on the main battery switch panel by the aft stateroom steps are breakers for the oil
change pump, bilge pumps (see Section 4D), parallel relays, CO detector, starting relays,
engine monitors, and battery condition indicators.
Main battery switch panel by aft stateroom steps.
Section 4G: Electrical Systems, DC 4.17