Alpha Pro charge regulator – User and Installation Manual
4.2.6 Connection of a battery isolator (optional)
When two or more battery banks (of the same chemistry) need to be charged simultaneously, a battery isolator is
recommended. See Figure 12 for installation details. Also see the Alpha Alternator Installation Manual for installation
examples.
CAUTION!
If there is a standard battery isolator between the B+ terminal of the alternator and the positive (+) pole
of the battery, both the red [+bat] wire and the brown [reg on] lines must be connected to the positive
(+) pole of the battery. Do not connect these wires to the input of the battery isolator.
Note: As battery voltage sensing is performed by the Alpha Pro charge regulator, you can use a battery isolator
that has no voltage sense connection.
Figure 12: Connection of a battery isolator
See Connection options on page 10
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