What is not a purpose of a galvanic isolator?

The primary purpose of a galvanic isolator is to prevent galvanic corrosion, which can occur when two dissimilar metals are connected in a conductive environment, such as water, creating a small electric charge that accelerates corrosion on the less noble metal. By breaking this electrical connection while still allowing for normal AC power to be used on board, the galvanic isolator protects the boat's metal components.

While it does enhance cathodic protection and provide electrical continuity under normal operating conditions, it is not intended to carry overcurrent. The design of a galvanic isolator ensures that it only conducts electrical currents that are safe, avoiding scenarios that could involve overloading the system. Therefore, carrying overcurrent is not a designed purpose of a galvanic isolator, distinguishing it from the other functions it serves.