Many yacht owners are familiar with the problem of corrosion, but few realize that electrical grounding plays a big role. One of the most effective tools to prevent galvanic corrosion is an isolation transformer.

What is Galvanic Corrosion?
Galvanic corrosion happens when two dissimilar metals are immersed in an electrolyte (saltwater) and electrically connected. This creates a current that slowly dissolves the less noble metal—damaging props, shafts, and thru-hulls.

How Shore Power Worsens Corrosion
When your boat is plugged into shore power, your AC ground wire is bonded to the marina’s grounding system. If neighboring boats or dock wiring have different electrical potentials, your boat can become the unintended path for stray currents.

How Isolation Transformers Help
An isolation transformer:

• Breaks the electrical connection between shore ground and the vessel
• Eliminates the path for galvanic currents to flow from shore
• Provides a safer power connection by preventing stray AC currents
• Reduces nuisance GFCI tripping

ANG Iso-Boost Transformers
ANG ISO-BOOST™ transformers combine galvanic isolation with automatic voltage boosting, protecting both your equipment and your hull. They are lighter and more efficient than traditional laminated transformers and include features like soft start and overload protection.

Additional Benefits

• Reduces corrosion-related maintenance
• Extends the life of underwater metals
• Enhances safety for swimmers near your boat

Recommendation
If your boat stays plugged in at the dock for long periods or you notice zincs deteriorating quickly, installing an isolation transformer is essential.