Description
Victron Galvanic Isolator VDI-64A | Boat Supply Store
Protect underwater metal components from destructive galvanic corrosion. This isolator effectively blocks stray DC currents originating from shore power earth, preventing electrolytic degradation of your hull, shaft, and propeller. Its dual anti-parallel diode configuration allows AC fault currents to pass to trip residual-current devices (RCDs), while blocking DC potentials above a 1.4 Vdc threshold. The fully potted, waterproof construction ensures reliability in harsh marine environments, making it essential for any vessel connected to shore power.
Key Features
- Prevents galvanic and electrolytic corrosion of underwater metal fittings.
- Blocks stray DC currents from shore power earth connections.
- Utilizes anti-parallel diodes with a 1.4 Vdc conduction threshold.
- Allows safe AC fault current to trip RCDs and breakers.
- Waterproof and potted construction for superior marine durability.
- Rated for a maximum continuous current of 64A.
- Features robust 6mm (1/4 inch) terminal posts for secure connections.
- Ensures the longevity of critical underwater components.
Specifications
| Product Specifications | |
|---|---|
| Brand | Victron Energy |
| Model | VDI-64A |
| Max Current Rating | 64A |
| Waterproof Rating | Potted |
| Conduction Threshold | 1.4 Vdc |
| Terminal Post Size | 6mm (1/4 inch) |
| Diodes | Dual, anti-parallel |
| ABYC A-28 Approval | No |
Who This Is For
Boat owners whose vessels are connected to shore power and feature underwater metal components susceptible to galvanic corrosion. Ideal for those seeking robust protection against electrolytic damage to propellers, shafts, hulls, and through-hull fittings.
How It Compares
| Feature | Victron Galvanic Isolator VDI-64A | Competitor |
|---|---|---|
| Max Current Rating | 64A | 64A |
| Waterproof | Yes (Potted) | Yes |
| Construction | Potted | Typically sealed, not always specified as 'potted' |
| Diodes | Dual diode (anti-parallel) | Dual diode |
| Terminal Post Size | 6mm (1/4 inch) | Varies by model, often spade or ring terminals |
| ABYC A-28 Approval | No | Varies by model, some may be |
Common Concerns Answered
What if my insurance policy requires ABYC A-28 approval?
The Victron Galvanic Isolator VDI-64A is not ABYC A-28 approved. While it effectively prevents galvanic corrosion, owners requiring this specific certification for insurance purposes may need to explore alternative models that meet this standard.
Is installation straightforward for a DIYer?
Installation requires basic electrical knowledge and involves cutting into the shore power earth wire to integrate the isolator. Proper understanding of AC wiring and safety protocols is essential. For those unsure, professional marine electrical installation is highly recommended to ensure correct and safe setup.
Will this isolator affect my RCD or GFCI protection?
No, this galvanic isolator is designed to allow AC fault currents to pass through, ensuring that your residual-current device (RCD) or ground-fault circuit interrupter (GFCI) will still trip in the event of a dangerous electrical fault, maintaining safety standards.
Frequently Asked Questions
What is a galvanic isolator and why do I need one?
A galvanic isolator is a safety device installed in the earth conductor of a boat's AC shore power system. It prevents galvanic corrosion, an electrochemical process that occurs when dissimilar metals are in contact in the presence of an electrolyte (like saltwater), by blocking the flow of stray direct current (DC) while allowing alternating current (AC) fault currents to pass for safety.
How does the Victron Galvanic Isolator VDI-64A prevent corrosion?
It utilizes two diodes connected in anti-parallel. These diodes block small DC voltage differences (typically below 1.4 Vdc) that drive galvanic corrosion, preventing the flow of destructive currents between connected underwater metal components. Above this threshold, the diodes conduct, allowing AC fault currents to trip protective devices.
What is the maximum current rating for this galvanic isolator?
The Victron Galvanic Isolator VDI-64A is rated to handle a maximum continuous current of 64 Amperes (64A).
Is this galvanic isolator waterproof?
Yes, the Victron Galvanic Isolator VDI-64A features a waterproof (potted) design, making it robust and suitable for the demanding conditions of a marine environment, protecting internal components from moisture ingress.
Where should the Victron Galvanic Isolator VDI-64A be installed on my boat?
It should be installed in-line with the green ground wire of your boat's AC shore power system, typically at the point where the shore power cord connects to the boat's electrical panel or shore power inlet. Ensure secure connections and follow the wiring diagram in the manual.
