I would not spend much money on a galvanic isolator (GI). The main cause of the galvanic corrosion is a result of connecting the AC and DC grounds. Check if you have these grounds connected. Most older and smaller vessels don’t have the grounds connected and don’t have galvanic corrosion problem. Also, the industry is moving away from this requirement.
One is better off investing in a whole vessel GFCI breaker(also called an ELCI Main Circuit Breaker). These cost much less than a typical fail-safe GI and provide galvanic isolation from stray AC currents by disconnecting the power, and more importantly they provide much better ground fault protection than connecting AC & DC grounds. If one still prefers bonding the AC & DC grounds then I would recommend the Yandina GI or better, a DYI GI, and connect the GI between the AC to DC connection to provide a fail-safe connection. I have a write up on my blog about this and also how to make a DYI GI, but in short, don’t waste money on an expensive GI, invest your money in an ELCI breaker, individual GFCI circuit protectors, and a decent marine charger (not a cheap HF/Walmart/Amazon brand ) http://svjohannarose.blogspot.com/search/label/GalvanicIsolator <http://svjohannarose.blogspot.com/search/label/GalvanicIsolator> - Paul E. 1981 C&C Landfall 38 S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ <http://svjohannarose.blogspot.com/> > On Jun 1, 2019, at 9:32 AM, [email protected] > <mailto:[email protected]> wrote: > >> >> >> On May 31, 2019, at 3:47 PM, Bruce Whitmore via CnC-List >> <[email protected] <mailto:[email protected]> >> <mailto:[email protected] <mailto:[email protected]>>> wrote: >> >> Thanks to David for raising the issue of galvanic isolators. >> >> I have to admit, I don't have one on my boat, and I haven't worried about it >> very much as my zincs are lasting more than 7 months in a salt water >> environment in a small harbor surrounded by boats that are always plugged in >> to shore power. As a result, I don't think I have much of a problem going >> on, if any. >> >> That said, the idea of having an isolator in place would make me feel better. >> >> Have any of you tried the following isolator? >> >> http://yandina.com/GalvInfo.htm <http://yandina.com/GalvInfo.htm> >> <http://yandina.com/GalvInfo.htm <http://yandina.com/GalvInfo.htm>> >> >> On my last boat, I had one of their battery combiners for about 15 years, >> and I found it to be (virtually) flawless. When I did had one fail, they >> replaced it without blinking an eye, and they provide an unlimited warranty. >> >> >> The price is nice as well... >> >> Thoughts? >> >> Bruce Whitmore >> 1994 C&C 37/40+ >> (847) 404-5092 (mobile) >> [email protected] <mailto:[email protected]> >> <mailto:[email protected] <mailto:[email protected]>>
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