Ensures you will always have a fully charged reserve battery! When the Switch is in position I, it becomes the sensing battery for VSR.
Battery 2, which is in isolation, will be charged via the VSR when the engine is running, ensuring it is always fully charged. When the Switch is in battery 2 position, this becomes the sensing battery and battery 1 is charged via the VSR.
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BEP® Marine Battery Selector Switch
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