Victron Galvanic Isolator VDI-16A, 16 AMP Max Waterproof Potted

The Victron Galvanic Isolator VDI-16A is an essential piece of marine electrical protection equipment designed to prevent costly electrolytic corrosion on your vessel's underwater metals. Anyone who has spent years on the water knows that galvanic corrosion—the silent degradation of your boat's through-hull fittings, propeller, and sacrificial anodes—can quickly turn an expensive repair bill into a catastrophic failure. This 16-amp-rated isolator blocks the low-voltage DC stray currents that travel through the shore power earth wire, eliminating the electrochemical pathway that causes metal degradation in saltwater and freshwater environments alike.

Built by Victron Energy, a trusted name in marine power systems, the VDI-16A uses galvanic isolation technology to break the electrical loop responsible for corrosion without interrupting safe shore power bonding. The unit is fully waterproof and potted in a protective compound, meaning it can withstand the harsh marine environment—salt spray, humidity, temperature swings, and vibration—without degradation or failure. At 16 amps maximum capacity, it's suitable for boats with moderate to heavy shore power loads, and its compact dimensions (6 x 3 x 8 inches) make it easy to mount in tight engine compartments or electrical lockers.

This isolator is ideal for cruising sailboats, center console fishermen, and liveaboard powerboats that spend extended periods connected to shore power—the exact scenario where galvanic corrosion accelerates. Installation is straightforward: it connects inline between the shore power ground (earth) and your boat's bonding system, requiring no complex reconfiguration of your electrical panel. If you're serious about protecting your hull hardware and maximizing the lifespan of expensive underwater metals, the Victron Galvanic Isolator VDI-16A is a proven, cost-effective investment that pays for itself the first time it prevents a corroded propeller shaft or seized sea-cock.