Newmar GI-50 Galvanic Isolator

Protecting your boat's underwater metals from sneaky corrosion doesn't have to mean constant zinc replacements or surprise haul-outs. The Newmar GI-50 Galvanic Isolator steps in as your frontline defense, tackling the root cause of galvanic action by isolating low-voltage stray currents between shore power's AC safety ground and your boat's DC bonding system.

How the Galvanic Isolator Shields Your Vessel

Picture this: you're docked at a busy marina, shore power humming along. Without proper isolation, tiny DC currents sneak through the green grounding wire, accelerating the sacrifice of your zinc anodes. These anodes are meant to corrode in place of valuable bronze struts, props, and thru-hulls—but excessive current eats them alive in weeks, not months.

The GI-50 changes that. It blocks most of those harmful low-voltage paths while keeping the essential AC safety ground intact for fault protection. A built-in high-capacity capacitor adds an extra layer, offering a low-impedance route for any AC leakage to ground safely, ensuring compliance with stringent marine safety standards.

Key Benefits for Boaters and Yacht Owners

• Extend Zinc Life Dramatically: Cut corrosion rates by up to 90%, meaning fewer dives or yard visits to replace anodes.
• Cost Savings That Add Up: Skip frequent haul-outs and zinc purchases—your wallet (and schedule) thanks you.
• Compact and Robust Build: Engineered for marine environments, it handles 115/230 VAC at 50-60 Hz and up to 50 amps without breaking a sweat.
• Peace of Mind on the Water: Maintains full ground fault protection, so you're safe from shocks while preventing electrolysis damage.
• Versatile for Various Setups: Ideal for boats with single or multiple shore power inlets, fitting seamlessly into existing AC panels.

Technical Specifications at a Glance

Simple Installation Tips for Optimal Performance

Getting the GI-50 up and running is straightforward, typically taking under an hour for a savvy DIYer. Mount it near your AC distribution panel in a dry, ventilated spot. Connect the shore power green ground wire to the "shore" terminal, and run a dedicated wire from the "boat" terminal to your bonding system bus bar. Use appropriately sized marine-grade tinned copper wire (at least #10 AWG) to handle the 50-amp load.

Pro tip: Test your setup with a multimeter post-install to confirm no continuity between shore and boat grounds under normal conditions—but instant connection if AC voltage exceeds 1.1V DC, verifying the capacitor's failover. Always consult your boat's wiring diagram and consider a marine electrician for complex systems.

Why Serious Mariners Trust This Setup

In the world of boating, where salt water and electricity mix unpredictably, proactive protection like the GI-50 pays dividends. Owners report zincs lasting seasons longer, especially in high-stray-current marinas. It's not just gear; it's an investment in hassle-free adventures, from coastal cruises to offshore passages.