For more information on these or any Guest products, please contact Kroes Corporation.

Galvanic Isolators

Guest Galvanic Isolators protect boats from galvanic erosion and metal loss. They accomplish this by preventing the electroplating action that occurs on boats with AC power feeds - blocking the DC current from flowing into the water, while passing necessary AC ground current for shore power safety.

Protects Outdrive, Prop, and, Everyone's Safety

The Guest Galvanic Isolator is installed in your boat, and electrically connected between the boat's AC panel ground and the dockside AC ground wire.

The Galvanic Isolator is designed to permit AC ground currents to pass safely between the boat and the dockside, but to block the small DC currents that can flow in seawater between boats in a marina because different metals on the boats are in the water.

Experience has shown that the different metals on a boat and in a marina (steel vs. aluminum, for example) actually act as the electrodes of a battery, with the battery fluid being the seawater. The direct electrical connection of a boat's hull ground to the dock ground passes on to the hull of a nearby boat, and becomes a short circuit to this virtual seawater battery. Current flows between the different metals, and can actually cause movement of metal just like a plating bath. The effect can be loss of metal off a prop shaft or prop blade. Some boats suffer accelerated corrosion of some boat parts, including the outdrive. If zincs protect the boat, they may erode very quickly.

The Guest Galvanic Isolator is a passive device in that it has no control functions, but only serves to block the galvanic currents between boats. It stops the accelerated corrosion caused by these currents and preserves the usefulness of important boat accessories and zincs.

Two Models with Status Monitoring - an ABYC requirement

Both the Guest Model 2433P (for 30 amp applications) and 2453P (for 50 amp systems) include Active Status Monitoring of the internal circuitry, and the external ground connections to assure full effectiveness and safety.

A green LED is illuminated when the Status Monitoring determines that both internal and external conditions are safe. A red LED is illuminated when either an internal fault or external shore ground unsafe condition exists.

For more information on any Guest products, please contact Kroes Corporation.