[PSUBS-MAILIST] batteries

[Rick Patton via Personal_Submersibles]

Hank,
That was me and have to stick with a certain battery size as it's a K-350
and the pods will only allow a certain size battery in them plus I have all
ready built the trays for the batteries. I could certainly use AGM
batteries if they were the same size as the led acid ones. Do AGM batteries
have more amp holding capacity than the led acid?
Rick

On Sun, Oct 29, 2017 at 12:04 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Brian,
> You mentioned that have to stick with lead acid, due to design.  I am
> confused?  why can't you use AGM?
> Hank
>
> On Saturday, October 28, 2017, 7:25:30 PM MDT, RICK Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Brian,
>
>
>
> Yes I’ll have three 12V batteries per bank.  I’ll have to check with a
> battery manufacturer to see what the biggest reserve amp hour battery that
> is made in a lead acid. I guess I might have to run in the “both” position
> if I can’t find a lead acid that will go much higher.
>
> Rick
>
>
>
>
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *Brian Cox via Personal_Submersibles
> <personal_submersibles at psubs.org>
> *Sent: *Saturday, October 28, 2017 1:01 PM
> *To: *Personal Submersibles General Discussion
> <personal_submersibles at psubs.org>
> *Subject: *Re: [PSUBS-MAILIST] batteries
>
>
>
> Rick,    Are you running 3 - 12volt  batteries for each bank ?   The amp
> hour calculation is pretty straight forward , sounds like you would have
> less than one hour of juice running everything full on.
>
>
>
> Brian
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.
> org>
> To: psubs chat room <personal_submersibles at psubs.org>
> Subject: [PSUBS-MAILIST] batteries
> Date: Sat, 28 Oct 2017 10:27:36 -1000
>
> I am trying to size my wire for the 36v side from where the power comes
> into the sub to selector switch to hot buss bar and was wondering if that
> was something that someone could answer. Also I was told by Minn-Kota that
> they recommend group 27 marine batteries.
>
> I have a couple of deep cycle (marine batteries) on my boat and they are
> 550 cca and 125 amps reserve capacity.
>
> My plan is to run all three Minn-kota thrusters off of one side at a time
> and their max draw is 46 amps max so there is 138 amps if all three
> thrusters are wide open. I doubt I would ever have all three maxed for more
> than short spurts but want to be repaired for the worst case scenario like
> if I am bucking a strong current.
>
> I also will be running 6 outside LED lights off the same bank and though I
> can dim them and selectively use them, all on at max would be about a 16.6
> amp draw as well. Now most of the time I will be using the thrusters at
> minimal draw and not all 3 at the same time and the 6 lights will probably
> never all be on at the same time.
>
> If everything was wide open, I would be pulling about 155 amps from a bank
> that has a reserve capacity of 125 so it would deplete the bank rather fast
> and may even damage the batteries due to a quick drain? So,,, first
> question...would 2 OTT wire be sufficient from battery source to bus bar as
> long as I am not running full tilt on everythig and second... since I have
> to stick with a lead acid system due to design, can I get a group 27
> battery that can deliver much more than the 125 amps I have on my boat?
>
> I also have the option of putting the battery selector switch on both
> banks if I have to but would rather deplete one bank at a time if can.
>
> Comments appreciated.
>
> Rick
>
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