The isolation transformer elimiates any electrical continuity between AC shore power
and the boat. It is essential for safety and eliminates the need for galvanic isolators
and polarity alarms.

Galvanic corrosion occurs when two dissimilar metals in electrical contact are
simultaneously exposed to an electrically conducting fluid. Seawater and, to a
lesser extent, fresh water are such fluids. In general, the more active alloy of the
couple corrodes preferentially while the less active (more noble) material is cathodically
protected. The rate of galvanic corrosion is a function of several variables including area
ratios, conductivity of the fluid,temperature, nature of the materials, etc.

The best solution to avoid galvanic corrosion and at the same time prevent any unsafe
situation is to install an isolation transformer to connect to the shore-side supply.