[C320-list] interstate SRM-4D Batteries

[danny jensen]

Graeme,
Thanks. I found this one from Blue Sea.

http://assets.bluesea.com/files/resources/instructions/980016770.pdf .
12.1v is the default disconnect. It comes with an override switch and an
option for alarm output which may be useful since my neighbor is a live
aboard and he could give me a call if he hears the alarm go off when I
forget to plug in my boat or I loose breaker power at the dock.


Danny


On Tue, Sep 8, 2015 at 9:56 AM, Graeme Clark <cg at skyflyer.co.uk> wrote:

> Danny
>
> You can buy a low voltage cut-out - they are very common in
> auto-applications such as vehicles with ancillary electrical services such
> as a tail-lift to prevent run down of the battery.  I believe the fridge
> auto cuts out at about 10.? V but thats too late to protect your battery.
>
> Google low voltage disconnector and look in ‘shopping’ results. Purpose
> made units or ones you can get from eBay where you cans et the voltage.
>
> I was told never to discharge below 50% which is approx. 12.2v; however
> that is steady state voltage-  if the current is being drawn when voltage
> is being measured you  will get a much lower reading. I guess I’d set it to
> about 11.8v maybe if I had one, but that is a guess - others may know better
>
> Graeme
> #366, Jaskar
> On 8 Sep 2015, at 17:30, danny jensen <danny at jensenshouse.com> wrote:
>
> > Dear Group,
> > I just killed off a set of interstate SRM-4D Batteries after about 4
> years.
> > It is very likely I caused these to die after a ran them down to 0 when I
> > lost shore power and had my refrigerator on. Also I believe one battery
> had
> > low water and it looked like the battery was deformed during charging.
> >
> > I have been running a balmar 100A alternator / MC-614 regulator an
> pulling
> > about 75A at anchor. Normal running it is configured in small engine mode
> > pulling max 35A. My balmar MC-614 has temp sensors on one of the
> batteries
> > the 2 SRM-4D are wired in parallel making one 268AH (234 x 2 per Warren's
> > Calc's). I have a xantrex link lite battery monitor and never take the
> > batteries down more than 80 percent ( one should use Warrens calculation
> > -5% first year and -3% thereafter). I shore charge with a xantrex 40A
> > charger. I spend 5 night offshore 10 times a year.
> >
> > The batteries started their life as 2 separate banks of 268 batteries
> then
> > I joined them in parallel 2 years ago on my boat rewire project per
> Jeff's
> > notes. My guess is that one battery failed and killed the other battery
> in
> > parallel. Maybe I abused on battery before I paralleled them?
> >
> > I was able to install these myself. But I was at my limit.
> >
> > Question:
> > 1. Is 4 years reasonable for flooded batteries
> > 2. Is there some sort of smart breaker I can apply to my Adler-Barbour
> > refrigerator
> > to idot proof not running my refrigerator when my batteries are say less
> > than 12.2vdc.
> > 3. I'm running Bulk charging for at 14.4 volts for at least 1 hours under
> > from by balmar. Much has been written about this topic so I just like to
> > get your take on this Warren, Jeff... others
> >
> > Battery Supplier for Interstate SRM-4D:
> > General Truck Supplies
> > Cost : $445 each
> > Next day delivery to store
> > 1515 Anaheim Street
> > Wilmington, CA 90744
> > 310 952-1040
> >
> > Danny
> > #972
>
>