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post #1 of 10 Old 01-21-2011 Thread Starter
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Galvanic Isolator Question

I am thinking of installing an galvanic isolator on my boat. My boat uses two 30-amp cables and an adapter to hook up to the 50-amp outlet at the box. The two power runs to the breaker box are separate and at least to the breaker box. I have not checked to see if one is dedicated to the ac/heater or if they are both tied together at the panel.

Now, for my question, do I need to install a 30-amp galvanic isolator on both lines or can I tie them together and install a 50 or 60-amp galvanic isolator?

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post #2 of 10 Old 01-21-2011
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I think you could do it either way. Here's a link with more information that may help. Their prices are good as well.
Galvanic Isolator Data Sheet

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post #3 of 10 Old 01-21-2011 Thread Starter
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Thanks, that is the information I was looking for.

I like that price. Does anyone have any feedback on this unit from Yandina?

"When in command, command." -- Admiral Nimitz

Difference between a power boater and a sailor out on the water: A power boater is going some place special, a sailor is already there.

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post #4 of 10 Old 01-21-2011
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I have a Yandina isolator as does a neighbor. Good product, good price, and good service.

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Great, thanks!

Allan

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Difference between a power boater and a sailor out on the water: A power boater is going some place special, a sailor is already there.

s/v Zotz 1981 Pearson 365 Ketch Hull #375
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post #6 of 10 Old 03-15-2011
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The galvanic isolator has to be able handle the full current that your system will see before the breaker trips. Otherwise your ground is compromised. If you're hooked up to a 50 amp shore outlet and you have a 30 amp system you need a 30 amp AC breaker on the boat anyway because the shore breaker for the 50 amp outlet won't protect your system.
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post #7 of 10 Old 03-15-2011
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Here's the one i use. rated for 50 amps AC and works for any shore power connection up to 50 amps or dual 30 amp inputs. 115 or 230 volts, 1 or 2 phase.
And it is only $99.95
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GIYan.jpg  

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post #8 of 10 Old 03-15-2011
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I love the Yandina products but the GI does not meet the current ABYC standards. As an ABYC installer I simply won't install them if they don't meet the minimum requirements, too much liability for me that I won't accept when there are plenty of GI's that do meet the requirement..

It would be very easy for them, and probably quite cheap, to fix this compliance issue but they have not. I for one would love it if they did make this GI ABYC compliant then I would install them. If my customer is comfortable after having the discussion that the device is not compliant with current minimum standards then on occasion I will install them but otherwise...

"28.6.1 The galvanic isolator shall be equipped with an integral or external status monitor that provides an audible or visible indication of failure."

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post #9 of 10 Old 03-16-2011
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True, it doesn't meet current ABYC standards.

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Quote:
Originally Posted by mitiempo View Post
True, it doesn't meet current ABYC standards.
I have no problem installing one on my own boat, except that when I sell it that would become a "noted" survey item, but I simply can't install them on customers boats easily. I REALLY wish Yandina would fix this minor compliance issue..

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