On 19 Jul 2006 05:51:08 -0700, "Andina Marie"
wrote:

By far the majority of accelerated zinc loss cause is the shore power
connection.
The first step is to install a galvanic isolator.
Defender has them on sale for about $95 at
http://www.defender.com/product.jsp?path=-1|328|303336&id=605562

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Is it possible to install the isolator external to the boat using the
right combination of connectors and junction boxes?

The shore power circuits on my boat are almost impossible to get at in
any reasonable way.