Victron Galvanic Isolator VDI-32A Waterproof

The Victron Galvanic Isolator VDI-32A (32A Max, Waterproof/Potted) prevents electrolytic corrosion by blocking low voltage DC currents that enter the boat via the shore power earth wire. It is designed for boaters who want to protect underwater metals like the hull, propeller, and shaft from corrosion.

Internally, this isolator uses two diodes connected in anti-parallel fashion, allowing current in both directions but only above a threshold voltage of about 1.4VDC. Installed directly behind the boat's 120V-230V connection, the forward voltage prevents electrolytic current from flowing, while a higher error voltage in the AC circuit still allows the residual-current device to break the circuit as needed. Browse more options in our battery chargers category.

Key Features

• Waterproof potted housing holds up to constant marine exposure.
• 6mm terminal posts handle higher-current shore power connections.
• Anti-parallel diode design blocks stray current while still passing the ground connection through for safety.

Frequently Asked Questions

What does this isolator protect against? Electrolytic corrosion of underwater metals like the hull, propeller, and shaft.

Where is this isolator installed? Directly behind the boat's 120V-230V shore power connection.

What is this isolator's max current rating? 32 amps.