[PSUBS-MAILIST] batteries

Tue Oct 31 05:10:05 EDT 2017

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
> <javascript:_e(%7B%7D,'cvml','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
>> <javascript:_e(%7B%7D,'cvml','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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>>
>>
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