[C320-list] Protecting The Batteries when away from boat at dock

[Jeff Hare]

:)  10.4v is a dead battery.  :)  Cutout should be a volt above that at
least.

-Jeff

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
Of Warren Updike
Sent: Friday, July 4, 2014 3:34 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Protecting The Batteries when away from boat at
dock

Cutting out at 10.4V isn't necessarily saving the battery especially if the
battery sits discharged for days. The longer a battery remains in a fully
discharged state the more damage is done.

-----Original Message-----
From: guyhenry222 at gmail.com [mailto:guyhenry222 at gmail.com]
Sent: Friday, July 04, 2014 12:25 PM
To: c320-list at catalina320.com
Subject: Re: [C320-list] Protecting The Batteries when away from boat at
dock

The Adler/Barbour fridge on my 1994 automatically cuts out if the voltage
goes under 10.4V

Guy
MoonShadow
#115


-----Original Message-----
From: Ken Geiger
Sent: Thursday, July 03, 2014 4:55 PM
To: c320-list at catalina320.com
Subject: [C320-list] Protecting The Batteries when away from boat at dock

In the Flooded Battery Thread, Warren mentioned a devise to sense low
battery and then disconnect the load (the reefer).
  I quote;

"For those who leave refer running while away from boat, there is a device
that will sense State of Charge and disconnect a load (refer.) This avoids
running a good battery into the ground (below 11 V) should shore power be
lost (a sure way to shorten your battery's life.) Jeff Hare can say more
about this device."

I wonder if one could protect the batteries while leaving the reefer on when

at dock and away, by paralleling in a
110 V relay coil with the parallel 12 V to the reefer on a set of contacts. 
The coil would drop out and open the
power supply to the reefer upon AC power loss thus prevent draining the
battery.

The Reefer switch on the panel would be in the off position and the battery
main switch on, supplying the parallel 12 V circuit to the reefer through
the relay contacts.

Ken Geiger
Northern Dream, 2000 #765