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Aluminum hulls require specific electrical configurations to prevent galvanic and stray current corrosion. Nigel Calder advises that an OVNI 435 sailboat typically utilizes an isolated DC ground system, which must remain strictly separated from the hull to avoid hidden corrosion risks.1:22 Owners should install a ground fault monitor to detect accidental connections between the DC system and the hull.1:48 To test for existing faults, disconnect the battery cables, turn on all electrical circuits, and use an ohmmeter to check for continuity between the negative conductor and the hull.3:06 On the AC side, an isolation transformer effectively mitigates galvanic corrosion by decoupling the AC grounding system from the water and hull.2:23 Regarding lightning protection, aluminum boats benefit from their conductive structure, provided the mast and rigging maintain a low-resistance path directly to the hull and the surrounding water.3:33 Ensuring these paths remain intact minimizes damage during a strike. Regular monitoring and proper isolation prevent long-term structural degradation in metal vessels.

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