[C320-list] Battery Isolation

[jelliott at landspring.net]

I'm learning more... These are relay-based devices; Blue Sea tech support
says they may induce RF noise if installed at the panel vs. at the battery
(not desirable in my case).  Have you experienced this?

The Guest isolators use Schottkey diodes, which induce a load (and
corresponding heat), but don't suffer the potential RF problem.

As usual, there is a tradeoff...

Julian



> The Yandina is the one I used (mine is a WM re-label of this product.)
> It's
> as simple as described. The Blue Seas Relay will definitely do the trick
> as
> well...
>
> Regards,
>
> Jon Vez
> Solstice #582
>
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
> jelliott at landspring.net
> Sent: Wednesday, April 08, 2009 4:09 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Battery Isolation
>
> John,
>
> I see WM has a Blue Sea Systems Starting Isolation Charging Relay which
> seems to do the trick.  Is that what you installed?
>
> Also seen similar items from Guest and from a company called Yandina
> (http://www.yandina.com/NewCatalog.htm).
>
> Looks like this fits the bill with a fairly straightforward installation.
> Almost too simple to be real...
>
> Julian
>
>
>
>> Julian,
>>
>> I have the exact setup you describe. I used a battery combiner from West
>> Marine. It's a simple device that you simply wire to each pole on the
>> back
>> of your current switch--one wire to the '1' and the other to the '2'.
>> It's
>> about the size of a match box and takes a couple of minutes to install.
>> It
>> will combine the batteries when motoring via the alternator and isolate
>> them
>> when not receiving a charge. Is the 'easy' solution to this problem....
>>
>> Regards,
>>
>> Jon Vez
>> Solstice #582
>>
>> -----Original Message-----
>> From: c320-list-bounces at lists.catalina320.com
>> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
>> jelliott at landspring.net
>> Sent: Wednesday, April 08, 2009 10:59 AM
>> To: C320-List at catalina320.com
>> Subject: [C320-list] Battery Isolation
>>
>> I am in the process of modifying my electrical system, and am curious as
>> to how others electrically isolate the house bank from the starting
>> battery.
>>
>> I have two 4D's under the settee paralleled as my house bank, and a
>> separate  starting battery located in the port lazarrette.  Both are
>> connected to independent channels of a Xantrax Truecharge 20.   The
>> house
>> bank is monitored with a Link 10.
>>
>> The banks are still not electrically isolated; I assume this is a result
>> of a common connection to the alternator?  How do others handled this?
>> I
>> understand there are battery isolators that do this?  Any advice on how
>> to
>> "break" this return circuit (if that's the cause) would be appreciated.
>> I
>> am not very interested in adding a second switch which I know some have
>> done.
>>
>> Thanks,
>>
>> Julian
>> Polaris #340
>>
>>
>>
>>
>
>
>