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Old 10-12-2012, 12:54 PM   #21
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Is the process for checking the power using a volt meter between the green (ground) and the white (nuetral) coming from the marina?
Yes! You can also check the water the same way.

We get three years on bottom paint and main zincs. Every time a new boat docks close to us I check. If the reading are high I notify the marina and then they will come a check.

We have an isolator but I do not have much faith in them.
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Old 10-15-2012, 06:44 PM   #22
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Galvanic Isolator, as per the topic heading.
Accordign to the Charles web site they say that the Charles Transformer isolator does not need a Galvanic Isolator."The only true marine isolation transformer available.
Marine ul listing ensures durability and safety. Greatly reduces the potential for in water shock hazard.
Eliminates the need for polarity alarms and galvanic isolators.
Full current carrying shield with encapsulated components and transformer windings.
Terminal blocks fro easy connections mounts to either bulkhead or deck.
Strain kit required for installation. "
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Old 10-15-2012, 07:38 PM   #23
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Accordign to the Charles web site they say that the Charles Transformer isolator does not need a Galvanic Isolator.
I would not argue with that.

Transformers are heavier and more expensive than isolators. That's probably why they are less common.
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Old 10-16-2012, 07:24 AM   #24
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I would not argue with that.

Transformers are heavier and more expensive than isolators. That's probably why they are less common.
I would think the cost is a big factor as well.
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Old 10-16-2012, 07:54 AM   #25
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I would think the cost is a big factor as well.
Bingo...depending on models I believe there are other benefits that include adjusting voltage to normal if the dock is a little low...but they are often 10x the cost or more of the more simple diode isolators.
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Old 10-16-2012, 09:03 AM   #26
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Bingo...depending on models I believe there are other benefits that include adjusting voltage to normal if the dock is a little low...but they are often 10x the cost or more of the more simple diode isolators.
I can tell you I will not ever have another boat without them. I never worry about the shore power and the fact that I have not needed outside zincs for over two years says they are doing their job. I now need the zincs replaced after two years and 3 months.
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Old 10-16-2012, 09:07 AM   #27
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Zincs and galvanic isolators are somewhat a common thing but in reality there's lots of other reasons zincs go fast that have nothing to do with galvanic isolators or isolation transformers. If you took the time to check the ground before you hooked up each time...the chances of needing them would be greatly reduced.
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Old 10-16-2012, 10:33 AM   #28
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As a live aboard on an old wood boat I have often thought about having an islotaion transformer. But due to noise and space issues I looked at having it on the dock beside the boat under a dock box or boarding step. Something that even being heavy I could move or load onto the boat when in need.

Still think about such but after 10 years here and no issues there there seems no point.

I did install the galvanic isolator however.
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