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PC925L & PC680 mounting

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Gwayne

Joined: 25 Nov 2008
Posts: 4

Posted: Thu Feb 21, 2013 8:58 am Post subject: PC925L & PC680 mounting

I have searched the archives and can't seem to fine any pictures or discussion on mounting a dual battery system comprising of a PC925L and PC680. Anybody have any pictures of their mounting configuration or "if I had to do it again" confessions?

I have considered the PC925L in standard rear position and PC680 on the firewall as in the RV7.



Thanks



Wayne

RV10 final wiring

RV7"eh?" flying

_________________
Wayne
RV 7 "eh?" 120 hrs
RV 10 fuse

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Thu Feb 21, 2013 1:44 pm Post subject: Re: PC925L & PC680 mounting

That's the same configuration I'm looking at.  Vans as you point out has a firewall kit for the pc680, I'm also looking at the Hawker tray.  It's similar to the one I have in my flying 6 although the battery in the 6 is smaller.   I believe someone has installed the firewall 680 and am looking for photos as well.

_________________
Dave Ford
Cadillac, MI

rene(at)felker.com
Guest

Posted: Thu Feb 21, 2013 2:33 pm Post subject: PC925L & PC680 mounting

I put a 680 on my firewall and have managed to kill the battery in two

years.  I think it was a heat problem.  Next month while I am doing my

condition inspection I am planning on taking the battery down to the battery

shop and having them check it out and see if they can help tell me what went

wrong.  I have a 925 in the back that dates back to 2007.  It is still going

strong, but I am planning on having that checked out also.  I put the 680 on

the firewall after I was flying for extra reserve power and.....to move the

CG forward.  When I was building the airplane, because of some online

discussions, I was concerned about the forward CG position of the stock

airplane and made some decisions that drove the CG back (o2 and ELT

placement).  But after I was flying I found the CG to far back.  So, I added

the battery.



Rene' Felker

N423CF

801-721-6080



--

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Thu Feb 21, 2013 4:09 pm Post subject: Re: PC925L & PC680 mounting

Here is our set up.  The PC925 fits perfect in the existing Vans designed tray.  I have no CG issues.  I have the Hartzell 2 blade prop, which helps keep it forward.

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_________________
Bill
WA0SYV
Aviation Partners, LLC

Last edited by bill.peyton on Fri Feb 22, 2013 5:19 am; edited 1 time in total

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu Feb 21, 2013 4:47 pm Post subject: PC925L & PC680 mounting

Seems like you need the 925L to match the cables as Vans supplies them, with the negative at the front end of the battery and positive to the rear.



On Thu, Feb 21, 2013 at 5:09 PM, bill.peyton <peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)> wrote:

 [quote]--> RV10-List message posted by: "bill.peyton" <peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)>

  

 Here is our set up.  The PC925 fits perfect in the existing Vans designed tray.

 

 --------

 Bill

 WA0SYV

 Aviation Partners, LLC

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=394768#394768

 

 

 

 

 Attachments:

 

 http://forums.matronics.com//files/img_1978_561.jpg

 

 

 

 

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Thu Feb 21, 2013 4:58 pm Post subject: Re: PC925L & PC680 mounting

Nice setup Bill, do you have any photos of your tray construction and supports for the battery and accessories?

_________________
Dave Ford
Cadillac, MI

robin(at)PaintTheWeb.com
Guest

Posted: Thu Feb 21, 2013 6:16 pm Post subject: PC925L & PC680 mounting

Nice!



Robin



Sent from the new iPad



On Feb 21, 2013, at 7:13 PM, "bill.peyton" <peyton.b(at)sbcglobal.net> wrote:



 	  Quote: 	
		   

 

 Here is our set up.  The PC925 fits perfect in the existing Vans designed tray.

 

 --------

 Bill 

 WA0SYV

 Aviation Partners, LLC

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=394768#394768

 

 

 

 

 Attachments: 

 

 http://forums.matronics.com//files/img_1978_561.jpg

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Thu Feb 21, 2013 6:42 pm Post subject: Re: PC925L & PC680 mounting

The  925L polarity is correct for the installation.  Sorry, I don't have any other photos of the tray.   .  The PC680 tray was purchased from ACS.

_________________
Bill
WA0SYV
Aviation Partners, LLC

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Thu Feb 21, 2013 7:14 pm Post subject: Re: PC925L & PC680 mounting

Mine is set up almost like Bill's. I made my own 680 holder. It is supported off of the factory battery mount. The bottom of holder is bonded to bottom skin with proseal. If I had it to do over, I would have installed the 680 on the firewall since 95% of my flights are with family and baggage. It limits my baggage to 99 lbs with existing rear seat passenger weights. I like the 30-45 minutes of panel power and aux starting capabilities. No ext power connector needed.

_________________
Wayne G.

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Fri Feb 22, 2013 7:25 am Post subject: Re: PC925L & PC680 mounting

Bill, how did you support the additional tray both under and toward the f1047 rib?

_________________
Dave Ford
Cadillac, MI

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Fri Feb 22, 2013 11:12 am Post subject: Re: PC925L & PC680 mounting

That side of the tray has a stiffener that slides under the rib to reinforce the rib.  I used 3 #8 hardware to attach to the rib.  It's very solid.

_________________
Bill
WA0SYV
Aviation Partners, LLC

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Wed Feb 27, 2013 7:19 am Post subject: Re: PC925L & PC680 mounting

Have been doing a little research on pc680 & firewall mounting.   The pc680mj is rated for temps of 176f vs 680 at 140f.  The tray that hawker sells for the 680 only, provides nice protection though.  Not sure if that would increase its rating or what real firewall temps would be behind baffling but within exhaust piping area .  I have a smaller 7ah battery on my 6 with the sd8 alternator mounted high in the center of the firewall but usually change that one out every other year.  I guess real question is what are real world firewall temps on the 10?

_________________
Dave Ford
Cadillac, MI

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Wed Feb 27, 2013 1:56 pm Post subject: Re: PC925L & PC680 mounting

They run as high as 190 F on a hot summer day at the lower firewall

_________________
Bill
WA0SYV
Aviation Partners, LLC

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