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[GMCnet] 3 battery Isolator [message #337719] Tue, 09 October 2018 08:30 Go to next message
Dean Hanson is currently offline  Dean Hanson   United States
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Registered: May 2018
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Senior Member
My Avion has a rear battery used to start Conan the Onan. It also handles a
number of 12 volt items on the right side of the coach. Since I mostly dry
camp and do not run the Onan, any suggestions other that a new Isolator with
output for 3 batteries and a new wire run to the rear?



Dean C. Hanson75 Avion.

Fremont, Ca. 94536

(510) 657-9600



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Re: [GMCnet] 3 battery Isolator [message #337726 is a reply to message #337719] Tue, 09 October 2018 10:22 Go to previous messageGo to next message
richshoop is currently offline  richshoop   United States
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Registered: April 2017
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Senior Member
If you are going to place battery #3 near the second coach battery, you can use a diode mounted on a heat sink to provide the isolation. The battery charging voltage will be 0.7V lower (the diode drop). You live in an area that should have lots of surplus electronic stores with just what you need. I will give you a call later today.

> On October 9, 2018 at 6:30 AM Dean Hanson wrote:
>
>
> My Avion has a rear battery used to start Conan the Onan. It also handles a
> number of 12 volt items on the right side of the coach. Since I mostly dry
> camp and do not run the Onan, any suggestions other that a new Isolator with
> output for 3 batteries and a new wire run to the rear?
>
>
>
> Dean C. Hanson75 Avion.
>
> Fremont, Ca. 94536
>
> (510) 657-9600
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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Re: [GMCnet] 3 battery Isolator [message #337728 is a reply to message #337719] Tue, 09 October 2018 10:40 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
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Registered: April 2010
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Senior Member
I use a combiner for that purpose.

Rick “two combiner” Denney

On Tue, Oct 9, 2018 at 9:30 AM Dean Hanson
wrote:

> My Avion has a rear battery used to start Conan the Onan. It also handles a
> number of 12 volt items on the right side of the coach. Since I mostly dry
> camp and do not run the Onan, any suggestions other that a new Isolator
> with
> output for 3 batteries and a new wire run to the rear?
>
>
>
> Dean C. Hanson75 Avion.
>
> Fremont, Ca. 94536
>
> (510) 657-9600
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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Re: [GMCnet] 3 battery Isolator [message #337736 is a reply to message #337719] Tue, 09 October 2018 14:18 Go to previous messageGo to next message
william weyrowski is currently offline  william weyrowski   United States
Messages: 8
Registered: October 2018
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Junior Member
I am also looking at redoing some wiring in my 73 and looking at a combiner
set up. In my set up, currently the engine and house are in the front and
the onan battery is in the rear, and I want to combine them all. Will I
need two combiners..one for the front two and a separate one for the rear.
I've read so many diagrams and it seems like they are all a little
different.

--
William D. Weyrowski
Midland, Michigan / Miami, Florida
73 Sequoia
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Re: [GMCnet] 3 battery Isolator [message #337738 is a reply to message #337736] Tue, 09 October 2018 16:17 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
Messages: 920
Registered: April 2010
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Senior Member
I use two combiners.

http://www.gmcmhphotos.com/photos/g3677-electrical-wiring-concepts-for-2773-230.html

http://www.gmceast.com/technical/Denney_GMC_Electrical_Sys.pdf

Note that I charge the genset battery from the converter, not the
generator’s internal charger.

Rick “no voltage drop” Denney

On Tue, Oct 9, 2018 at 3:19 PM william weyrowski
wrote:

> I am also looking at redoing some wiring in my 73 and looking at a combiner
> set up. In my set up, currently the engine and house are in the front and
> the onan battery is in the rear, and I want to combine them all. Will I
> need two combiners..one for the front two and a separate one for the rear.
> I've read so many diagrams and it seems like they are all a little
> different.
>
> --
> William D. Weyrowski
> Midland, Michigan / Miami, Florida
> 73 Sequoia
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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Re: [GMCnet] 3 battery Isolator [message #337741 is a reply to message #337738] Tue, 09 October 2018 18:21 Go to previous messageGo to next message
mghamms is currently offline  mghamms   United States
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Registered: March 2016
Location: Ware, Massachusetts
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Senior Member
I like the "Mouse Access Port"

How do you size that with the wire?

Richard Denney wrote on Tue, 09 October 2018 16:17
I use two combiners.

http://www.gmcmhphotos.com/photos/g3677-electrical-wiring-concepts-for-2773-230.html

http://www.gmceast.com/technical/Denney_GMC_Electrical_Sys.pdf

Note that I charge the genset battery from the converter, not the
generator's internal charger.

Rick "no voltage drop" Denney

On Tue, Oct 9, 2018 at 3:19 PM william weyrowski
wrote:

> I am also looking at redoing some wiring in my 73 and looking at a combiner
> set up. In my set up, currently the engine and house are in the front and
> the onan battery is in the rear, and I want to combine them all. Will I
> need two combiners..one for the front two and a separate one for the rear.
> I've read so many diagrams and it seems like they are all a little
> different.
>
> --
> William D. Weyrowski
> Midland, Michigan / Miami, Florida
> 73 Sequoia
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
Re: [GMCnet] 3 battery Isolator [message #337753 is a reply to message #337736] Wed, 10 October 2018 08:42 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
william weyrowski wrote on Tue, 09 October 2018 15:18
I am also looking at redoing some wiring in my 73 and looking at a combiner set up. In my set up, currently the engine and house are in the front and the onan battery is in the rear, and I want to combine them all. Will I need two combiners..one for the front two and a separate one for the rear.
I've read so many diagrams and it seems like they are all a little different.

--
William D. Weyrowski
Midland, Michigan / Miami, Florida
73 Sequoia
William,

You have neglected to tell us if the coach is a 23 or 26.

Assuming it is a 26, move the house bank to the rear so you have one less battery to take care of. Get the full slide out tray and then you will be in good shape.

I would like to write more, but we got back from Iowa, did the laundry and set out for New York and have just returned. I have a lot to do in the next few days, but one is not to prep for the next excursion.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] 3 battery Isolator [message #337769 is a reply to message #337719] Wed, 10 October 2018 15:57 Go to previous messageGo to next message
william weyrowski is currently offline  william weyrowski   United States
Messages: 8
Registered: October 2018
Karma: 0
Junior Member
Thanks Matt on the info and thanks for the previous email as well. Yes I
have already been contacted by several Michiganders, including John Wright
who just happens to live about 45 seconds away!

I plan on moving the house batteries to the rear, and am going through
wiring schemes before I ask any more questions. Want to have some idea of
what I am talking about before I ask for directions.

I will try and update my mods as they happen.

William Weyrowski
Midland, MI - Miami, Florida
73 Sequoia 26
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Re: [GMCnet] 3 battery Isolator [message #337775 is a reply to message #337719] Thu, 11 October 2018 07:42 Go to previous message
USAussie is currently offline  USAussie   Australia
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Dean,

I am electrically challenged so if my response is stupid that's to be expected. Smile

Here's a link to the 12 VDC system in an Avion if it helps:

http://www.gmcmhphotos.com/photos/aa-miscellaneous-photos/p41274-avion-12-volt-wiring-diagram.html



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
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