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VOLTAGE THRESHOLD

This waterproof relay is fully automatic and does not require a control signal to activate. As soon as the voltage of the engine battery reaches 13.3V, the relay will activate and couple the starter battery and the service battery. Similarly, as soon as the voltage of the engine battery drops below 12.9V, the relay will decouple the two batteries as long as it means that the engine is stopped or that a consumer (windlass for example) is using current on the starter battery and that it is better to isolate it.