[C320-list] Couple of start Battery questions

[Scott Westwood]

Thanks Brian.  Nice to know.

I just need to make sure I have a Start Battery large enough to crank the Yanmar 3GM30F.



FYI ..   I "was" not going to use AGM for the start battery.  I was going to use cheaper non-serviceable Lead Acid since the Balmar DDC 12/24 allows you to configure for any kind you want.  It only charges the Start Battery when needed and pulls the charge from the house bank source.  (Assuming I do things the way I plan).

While writing this...I just found an AGM at 800 CCA for the same price so I may change my mind on AGM start battery.
 Anybody know the minimum/ideally sized start battery for the Yanmar?

Thanks,




Scott Westwood scottwestwood at bellsouth.net H (919)-362-8538    C (919)-618-7185
 

    On Sunday, January 27, 2019, 10:06:43 AM EST, Brian McLamb <bjcnmclamb at gmail.com> wrote:  
 
 I have the set up that you describe with all AGM batteries.  Number 1
(group 24 I think) is starter and number 2 (4D equivalents) are combined
two batteries for house.  I have only used starter battery ocassionally.
You can isolate and use as you described and switch with out problem.  When
on shore power I leave on both as it charges.  Never had a problem. This
set up allows me to use fridge, lights, stereo at anchor and still have
starting power by only using house battery selection for power at anchor.
I do not have wind or solar backup and a weekend at Cape Lookout has  not
been a problem.  Motoring in ICW or NC coast area keeps battery topped off
in between anchorages.

Brian s/v Serenity #1075

On Sun, Jan 27, 2019 at 9:51 AM Scott Westwood <scottwestwood at bellsouth.net>
wrote:

> Decided to install start battery.
> If you have a separate start battery.....
>
> What size do you have?  i have heard Grp27 and Grp25?  What CCA? etc...??
> Optima has a Grp34 that has 800CCA and is only (LxWxH): 10 x 6 7⁄8 x 7
> 13⁄16 in and, according to them, is leak proof and take vibration for only
> $196??
>
> Next question gets more complicated.  Here is what I was thinking:  I was
> going to combine my 2 batteries into single house bank.  Then install a
> Balmar DDC 12/24 Duo charge.
>
> I was told.... that if I connect the start battery to switch 2 (Switch 1
> would be house bank) that I could turn the switch to Pos 2, then start the
> engine, then quickly turn the switch through "Both" to Pos1.  This would
> not cause any issues.
> Any thoughts on that?
> I was hoping to use the existing Pos2 wire that (I think) will reach my
> start battery if I can fit it into the space behind the Anchor Windlass
> switch.
> Thoughts?  Last thing I want to do is cause damage to expensive batteries
> or equipment.
>
>
>
>
> Thanks,
>
>
>
>
> Scott Westwood scottwestwood at bellsouth.net H (919)-362-8538    C
> (919)-618-7185
>
-- 
Brian McLamb