[PSUBS-MAILIST] batteries

Tue Oct 31 07:14:32 EDT 2017

Hi Hank,

I cant remember off the top of my head now.  I just had a quick search
and I cant find them.  They are just standard high current 24v pots of
some sort.

I seem to remember they were similar to yours.  Or some that you had used.

James

On 31 October 2017 at 10:25, hank pronk via Personal_Submersibles
<personal_submersibles at psubs.org> wrote:
> Hi James,
> What type of relays are you using?
> Hank
>
>
> On Tuesday, October 31, 2017, 3:10:27 AM MDT, James Frankland via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi rick,
> I'm here.  What do you want to know?  I'm using minn Kota rip tide 80's at
> 24v.  2x banks of 4 agm's. These are wired in 2 pairs of batteries in series
> with both pairs connected to the main terminals.  I have a standard heavy
> switch so I can use each bank separately or both together.  I used heavy
> tinned marine cable.  Can't remember the thickness.
>
> I find my motors a little underpowered, but other than that it seems fine.
>
> Aft thruster has the minn Kota controller, I originally had those on the
> sides but found it a pain, so I changed those to have just on/off relays.
> Much better.
>
> Regards,
> James
>
> On Monday, 30 October 2017, Rick Patton via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
>
> Alan
> Yes there are 2 separate pods each containing 4 each 12v batteries , 3 for
> the 36v for thrusters & 1 for the onboard systems.
> DAN H built his per plans and specs and is running his stern thruster off
> one side & and sides off the other side but he is not running Minn-Kotas.
> I am hopping James Franklin will chime in as he is using the Minn-Kotas in
> his.
> Rick
>
> On Sun, Oct 29, 2017 at 8:13 PM Alan via Personal_Submersibles
> <personal_submersibles at psubs. org> wrote:
>
> Rick,
> I am not familiar with the k350 battery set up, but are there two
> battery pods with 3 x 12V batteries in each pod?
> What are the other k350 owners doing? Do they run the 3 thrusters
> off the 2 battery pods similtaneously i.e. connect both pods in parallel.
> If you did this then you would only be drawing half the amps off each
> battery pod, than you would be if you were using one.
> I wonder what traction batteries mobility scooters use?
> Cheers Alan
>
>
>
>
>
> Sent from my iPad
>
>> On 29/10/2017, at 9:27 AM, Rick Patton via Personal_Submersibles
>> <personal_submersibles at psubs. org> wrote:
>>
>> 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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