Balmar 94LY Series Installation And Operation Manual - Page 7

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Balmar 94LY Series Installation And Operation Manual

TWIN ENGINE ISSUES

Twin engine applications pose some unique challenges in addressing battery needs. Some primary charging con-
figurations are as follows:
1. Dedicate Alternator #1 to charge engine starting batteries. Dedicate Alternator #2 to the house battery bank.
2. Combine outputs from Alternator #1 and Alternator #2 to provide increased charging amperage for the main
(house) battery bank, and supply the engine (and other secondary) batteries via Digital Duo Charges or combin-
ers. Combining the output from two alternators on two engines will require the use of Balmar's Centerfielder II
(described below).
This configuration will require that both alternators are equipped with Max Charge regulators, which are designed
to provide sufficient field current to drive two alternators. For additional information, download the Centerfielder II
instructional manual from the Balmar website; www.balmar.net.

CENTERFIELDER II

so available amperage from both alternators can be combined to support larger battery banks. The Centerfielder
II monitors field and ignition wires on port and starboard voltage regulators (Max Charge 12-volt or 24 volt regula-
tors are uniquely engineered for dual alternator operation, and are the only regulators recommended for use with
the Centerfielder II).
When both regulators are up and running, the Centerfielder II identifies the dominant regulator and splits its field to
supply both alternators with the same excitation current. This allows the user to supply output from both alternators
to the same battery bank. In multi-bank battery systems, the output can be directed to additional banks via Digital
Duo Charge or other control device described on Pages 5 to 6. A typical system wiring design is shown below:
Balmar's Centerfielder II enables twin engine systems to balance alternator output,
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