Pro-Line Boats 24 Walkarounds Owner's Manual page 15

Direct Current
12 volt direct current provides electrical power for all lighting, refrigerator (12v at sea), pumps,
electronics, and DC devices. A main breaker is located on the transom. Battery selector switches
are on the transom for battery isolation, parallel operation and disconnect. Caution: To avoid
possible alternator / battery damage on twin engine installations, ensure that the optional dual
battery switches are never left so both engines are connected together (never leave a switch on
'both'). The preferred switch position is port engine to port battery, starboard to starboard.