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ARCTIC STAR OPERATING MANUAL
NW Explorations | 23
5.4
Inverter/Charger
Two Magnum Energy Inverter/Chargers are the interface between the 120-volt AC system and
the 12-volt DC system. When powered with shore power or onboard generator, these units will
convert the 120-volt AC power to 12-volt DC and charge the batteries. When powered with 12-
volt DC, it can invert the power to 120-
volt AC for selected circuits. These ‘smart’ units will
automatically switch from inverting to charging depending on the input. The inverter units are
mounted in the engine room outboard of the starboard engine and have control panels
mounted to the starboard side of the lower helm station. Arctic Star has two Inverters to
double the power for charging the batteries. Only one inverter is used to invert DC to AC power
for the the selected AC circuits.
The display has LED lights on the left side indicating the inverter/charger status and below are
ON/OFF buttons to manually turn these functions on or off. The LCD display has two lines that
describe which function is active and the status (top line) and the battery charge information
(bottom line). When 120-volt AC power is supplied the display will indicate charging at one of
three levels:
1.
Bulk Charging
–
high power; the charger is delivering maximum current
2.
Absorb Charging - moderate power; the charger is delivery a constant current
3.
Float Charging
–
low power; charger is maintaining fully charged batteries
The display will indicate when Full Charge has been reached; this is the battery saver mode, and
the charger will maintain charge without overcharging.
The bottom line will indicate the battery voltage with charger applied and amps or power being
applied to the batteries.