12-Volt Dc System; Batteries; Fuses And Circuit Breakers; Battery Switch - Maxum 2500SCR Owner's Manual

40 CHAPTER 12: ELECTRICAL SYSTEM

12-Volt DC System

Batteries

The batteries supply electricity for lights, accessories, engine starting.
The Electrical section of Chapter 8, in the Cruiser & Yacht Owner's Manual, provides battery, care and
maintenance instructions.

Fuses and Circuit Breakers

• Fuses and circuit breakers for engines and main accessory power are on the DC main distribution panel and on the
battery switch panel.
• Some equipment may have secondary fuse protection at the unit, behind the battery switch panel or at
the batteries.
• Electronics power is provided at the helm station.

Battery Switch

• The battery switch has four (4) positions.
• Some "Standby Loads", such as the CO monitor, the auto-
matic bilge pumps, and the stereo memory, are not affected
by the battery switch since they are wired directly to the bat-
tery (see the Wiring Diagrams in this Supplement for
more details).

Battery Switch Positions

Since the batteries on your boat were dealer-installed, the battery switch positions listed below
may vary. Make sure you get a full explanation of battery switch use from your selling dealer.
Battery Switch
Engine Starting
Position
POSITION Battery 1
1
Starting Power
POSITION
2
Starting Power
POSITION BOTH Batteries
Provide Starting
BOTH
NOTICE
Accessories and Lights
Battery 1
Provides Provides Power for
Accessories and Lights
Battery 2 Battery 2
Provides Provides Power for
Accessories and Lights
BOTH Batteries Provide
Power for Accessories and
Power Lights (not advised
unless engine is running)
POSITION "1" POSITION "BOTH"
ACTIVATES ACTIVATES BOTH
BATTERY "1" BATTERIES
BATTERY SWITCH
Engine Alternator
Charges
Battery 1
Charges
Battery 2
Charges BOTH Batteries will NOT
Batteries Charge Properly
POSITION "2"
ACTIVATES
BATTERY "2"
"OFF"
POSITION

Battery Charger

Charges
BOTH
Batteries
Charges
BOTH
Batteries