[C320-list] Link 20 Battery Monitor Installation

[Mike Ott]

Got it.  Makes sense now.  I appreciate the help, Jeff.
Regards,
Mike

--- On Wed, 11/11/09, Jeff Hare <catalina at thehares.com> wrote:


From: Jeff Hare <catalina at thehares.com>
Subject: Re: [C320-list] Link 20 Battery Monitor Installation
To: C320-List at Catalina320.com
Date: Wednesday, November 11, 2009, 10:29 PM



Hi Mike,

The dc shunt Should be mounted very close to the batteries.  

The negative terminals of both 4Ds are hardwired together with 2/0 (typically).  Leave that as is, but unhook all other connections to either battery's negative terminal.  (This usually means the windlass ground, the starter motor ground and the ground leading to the DC panel).

Now all those wires you removed go to one side of the shunt.  The other side of the shunt connects to the battery negative terminal using a minimum of 2/0 sized wire.  

So,  now no current can leave/enter either 4D battery without going through the shunt.

-Jeff H



------Original Message------
From: Mike Ott
Sender: c320-list-bounces at lists.catalina320.com
To: Catalina 320 Association
ReplyTo: C320-List at Catalina320.com
Subject: [C320-list] Link 20 Battery Monitor Installation
Sent: Nov 11, 2009 8:06 PM

Hello all,
I am installing a Xantrex Link 20 battery monitor and the installation looks pretty straight forward.  I bought the twisted pair cable to connect the sensor wiring but the ground wiring plan is vague.  The directions defer to battery load sizing.  I have 2 - 4D - 12 volt (wet) batteries.
I need help with 2 issues:
1) What size wire should I use for the shunt to battery ground connections ?
2) Where is the easiest place to pick up the 'DC System Negative' connection, the negative buzz bar at the DC panel ?  The engine block ?
Regards,
Mike
'Amanda Lu'
#508