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The quantity of DC power is limited to the capacity of these batteries. Therefore, running hair
dryers, toaster, electric coffeepots, space heaters, microwave, etc. will quickly discharge the
house/inverter batteries. Use these items VERY SPARINGLY! Monitory your battery usage very
carefully!
12-volt DC System
House Battery Bank Switch
5 battery banks support the 12-volt DC power c/o: 1-engine battery, 4-house batteries. The
BATTERY SWITCHES are located in the forward part of the aft cabin on the wall (behind
companionway step).
The 12-volt panel shows all the systems supported by our batteries. Primarily you will be
turning on the breakers for lights, water pressure, electronics, etc. Interior lights are also
powered from a circuit breaker on this panel but many have individual switches at each fixture.
Bilge pumps should always be left on. All the breakers should be turned off after every use.
The HOUSE BATTERY BANK provides power for all DC systems. When disconnected from shore
power, all 12-volt devices and 110-volt devices drain the house batteries.
Battery systems will lose their charge while ANCHORED or MOORED. Avoid this by using power
sparingly at anchor. Turn the refrigerator off at night. Use only one or two lights at a time.
Turn off systems not in use such as instruments, VHF, stereo, etc. If you do not need the cabin
heater, turn it off. If you stay moored for more than a day, run your engine just above idle to
recharge your batteries. WATCH YOUR VOLTAGE! Batteries are charged by the engine
ALTERNATOR while underway. The engine/house batteries are also charged by the BATTERY
CHARGER when connected to shore power.
Note – Do not change the position of the battery switches while the engine is running or the
alternator diodes will be damaged. Change positions only with the engine off.
Voltage (Wet Cell Battery)
Battery State
12.65 volts
100%
12.47 volts
75%
12.25 volts
50%
11.95 volts
25%
11.70 volts
0%