INSTALLATION
MANUAL
© Scania CV AB 2018, Sweden
Batteries and alternators
03:01 Issue 11 en-GB 8
Alternator charging for marine engines
In order for the alternator to start charging, the B+ terminal of the alternator must
have +24 V. For certain engine installations, it may be necessary to use an electronic
battery insulator in order for B+ to receive +24 V. Refer to the illustration for con-
nection of the battery insulator.
1. Engine control unit
2. Alternator 2 (only with double alternators)
3. Battery insulator
4. Input to battery insulator
5. Ground
6. Output from battery insulator
7. Output from battery insulator
8. 15 voltage to battery insulator
Marine engines with split ground system
When double alternators controlled from the engine control unit charge different bat-
tery groups, the battery negative terminals must be connected together. Otherwise, a
fault code is generated.
1. Engine control unit
2. Ground connection between batteries
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