What is the function of a galvanic isolator in a marine electrical system?

A galvanic isolator plays a crucial role in a marine electrical system by preventing galvanic corrosion. Galvanic corrosion occurs when dissimilar metals are in contact with each other in the presence of an electrolyte, such as seawater, leading to the accelerated deterioration of one of the metals. The galvanic isolator achieves this by electrically isolating the boat's bonding system from the shore power system, preventing any direct electrical connection between the two. This isolation stops the electrolytic corrosion process, protecting metal components on the vessel from damage and preserving their integrity over time.

In marine environments, where metals often face harsh conditions, preventing galvanic corrosion is essential for maintenance and longevity of the vessel’s components. The other options do not align with the primary function of a galvanic isolator. For instance, increasing voltage, providing universal connectivity, or storing energy are not relevant in the context of corrosion prevention, which is the primary design purpose of a galvanic isolator.