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AnAmCArA OperAtinG mAnuAl
NW Explorations
A “house bank” consists of two 12-volt batteries (#2 and #2A), paralleled to give a reserve pow- er. These are on the
starboard side of the engine room. Connected to these are all the pumps, interior and exterior lights, horns, navigation
and radio gear, etc., the boat’s “house”. They are charged by the alternators on the main engines and, when there is
shore power or the generator is running, by the battery charger if it is on, or by the inverter.
An “inverter bank” of two batteries (#4 and #4A) in parallel provides power for the inverter. Using the battery switch
on the forward engine room bulkhead, the inverter battery bank can be combined with either the house or starting
batteries for additional power
.
This parallel switch should be left in the #1, “parallel with house” position!
Another 12-volt battery (#3, in the engine room under the genset) provides 12 volts for starting the generator.
If the engine starting battery is low, you can provide voltage for starting by either:
1. pressing the “Batt Parl” rocker switch by the horn button on the helm;
2. resetting the inverter battery parallel switch to #2, “parallel with engine battery” or
3. starting the generator and turning on the charger.
Note: If it takes more than two attempts to start an engine or the generator, turn off its sea water valve to avoid
water-locking the engine until it starts.
Another pair of two batteries in parallel is forward under the guest stateroom berth to operate
the bow thruster. See the
“Thruster” section on
page 48.
What redundancy!
4G3: DC Battery Chargers
The vessel is equipped with a 12-volt battery charger. It charges all the batteries,
although normally this charger is off and 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.
The battery charger starboard
in the engine room, feeds the
starting, house & genset batteries
directly and the thruster
batteries through an echo relay.
