Marquis 420 Sport Coupe Owner's Manual page 30

DC E S
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Generator Battery
Monitoring Battery Voltage Levels
Engine Batteries
Accessory Batteries
Charging the Batteries
Never allow the boat's batteries to become completely discharged. Completely
discharging a battery can damage it to the point that it can no longer be
recharged.
The battery charger should always be operating when your boat is connected to
shore power. If you leave your boat for an extended period of time and the boat
is not connected to shore power, turn all battery master disconnect switches to
the OFF position.
2
The generator has its own dedicated battery. Electricity from the battery to
the generator starter is controlled by a master disconnect switch (same as
battery disconnect shown on page 1). This switch is located in the engine
room near the base of the aft starboard bulkhead. To provide electricity to
the generator starter, turn the master disconnect switch to the ON position.
A fully charged battery that has not been charged or discharged for at
least two hours should indicate between 12.3 and 12.6 volts. A reading
below this level indicates a partially discharged battery.
You can determine the voltage level of each engine battery pair by
activating the battery's dedicated voltmeter. The voltmeters are located
at the helm. To activate each engine's voltmeter, turn the engine's ignition
key one position to the right.
: You do not need to start the engine to activate its voltmeter.
Note
Refer to the OEM information for details on operating the
engines.
You can determine the voltage level of the accessory batteries using the
voltmeter located on the interactive DC Control Panel - Helm.
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ECtion
3837 • U3 10/07