What is the primary function of a Galvanic Isolator in marine electrical systems?

The primary function of a galvanic isolator in marine electrical systems is to block low voltage DC galvanic current flow. Galvanic corrosion can occur when two different metals are electrically connected in the presence of an electrolyte, such as seawater. This can lead to the deterioration of metal components, particularly in boats where dissimilar metals are often used in the hull and propulsion systems.

A galvanic isolator acts as a protective barrier, allowing AC currents to pass through while preventing harmful DC currents from entering the hull. By blocking these low voltage DC currents, the galvanic isolator helps to minimize the risk of galvanic corrosion, thereby extending the life of metal components and equipment on the vessel.

The other options relate to functions that a galvanic isolator does not perform. Blocking high voltage AC current flow is not its primary role, as it is specifically designed for protecting against low voltage DC galvanic currents. Enhancing power efficiency and regulating battery charge are functions typically associated with other components within electrical systems, such as inverters, converters, and charging systems, rather than with galvanic isolators. Thus, the correct focus of the galvanic isolator's function is crucial for understanding its role in marine applications.