Guest
Battery Isolators
Complete, automatic control of multiple battery systems
Guest battery isolators allow you to connect your engine
alternator to both batteries or banks of batteries for independent battery charging.
They'll also prevent a higher charged battery from discharging into another, lower charged
battery, by keeping both batteries electrically isolated from one another.
These solid-state devices act as electronic valves that
keep your charging system operating safely. When your engine(s) is running, both batteries
are charged automatically. When used with a Guest non-field disconnect battery switch, you
have complete control over battery selection for power use, plus alternator protection
provided by the isolator. Models are available for systems with 10-120 amp alternators for
6, 12, 24 and 32-volt negative ground systems.
Selecting the Right Isolator for Your System
The first step in selecting the correct isolator is determining whether your regulator has
isolation diodes. With batteries connected, ignition (key) "off" and battery
switch (if you have one) "on", measure the voltage between the reg/aux/61
terminal and the engine block with a meter set on 20 volt scale. If the voltage reading is
anything other than zero (0), there are no isolation diodes. If this is the case, be sure
to order the required kit, #U-3059. The chart below lists the appropriate isolator for
specific applications and alternator outputs. For outboard alternators other than OMC,
order Model #2401A. |
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