[PSUBS-MAILIST] (no subject)

Mon Mar 9 01:31:11 EDT 2020

Thanks for the web site!
Rick

On Sun, Mar 8, 2020 at 4:10 PM Sean T. Stevenson via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> AGMs typically require lower charge rates and lower final voltages than
> flooded cells. Check the literature for your particular batteries, but I'm
> thinking I wouldn't want to go any faster than C/5 for bulk charge. Look
> for a charger intended specifically for AGMs. They top out around 13.7 V
> instead of 14.5.
>
> Always best to conform to the manufacturer data. More expensive chargers
> have temperature compensation, because you need to adjust voltage per cell
> a bit for temperature. Lead-acid of any description usually have a constant
> current bulk charging phase, a voltage limited saturation phase, and then a
> float. Best to use a charger suited to your battery size, because charging
> too slowly can also cause longevity issues.
>
> Here's a good resource for general battery information:
>
> https://batteryuniversity.com/learn/
>
> Sean
>
> -------- Original Message --------
> On Mar. 8, 2020, 17:27, Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> don't know much about batteries but I haven't bought them yet. There gonna
> be AGM 12 volt batteries so good idea about contacting the manufacturer to
> see what they say. Boat won't be used commercially so would be several days
> in between dives at least so maybe a 2 and 10 amp charge setting would be
> ok?
> Rick
>
> On Sun, Mar 8, 2020 at 11:24 AM Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Rick,
>> If you want to use your submarine semi-commercially or do multiple dives
>> in a day I would go for a charger with a higher amp rating for a faster
>> charge;
>> however there would be a limit, as if you charged them too fast the
>> batteries
>> would off gas more. I am not sure what batteries you have, but there would
>> probably be data on charging rates. Maybe look at how fast you could
>> charge
>> them with chargers of varying amp ratings & factor that in.
>> If you have time & are going to charge them overnight then ignore the
>> above.
>> Alan
>>
>> On 9/03/2020, at 9:16 AM, Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>> Hey guys, any other feed back on what you use for a battery charger for
>> 12 or 36 volts, Sean, whats your input?
>> Rick
>>
>> On Sun, Mar 8, 2020 at 9:48 AM Brian Cox via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> Alan,           According to the specs an my batteries is shows a low
>>> voltage of 5 volts .     But better battery life if discharged less than 50
>>> %
>>>
>>>
>>> https://resources.fullriverbattery.com/fullriver-battery/external-media/spec-sheets/DC220-6.pdf
>>>
>>>
>>>
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 21:29:48 +1300
>>>
>>> Brian,
>>> It is recommended not to take lead acid batteries below 50% charge,  or
>>> 12.2V.
>>> So 48.8V.
>>> However when you have a heavy load on them they indicate a lower voltage
>>> than
>>> what they will be if you stop the motor & let them recover.
>>> Alan
>>>
>>>
>>>
>>>
>>> On 8/03/2020, at 7:04 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> David,   yes I'm running off my batteries, they are AGM, I have eight
>>> 240  ah  batteries.  I'm not sure how low I can go with the voltage,   I
>>> believe the storage indicator has a low limit where it would read zero, but
>>> I'm pretty sure the motors will run on 36 volts,  there is most likely a
>>> recommended low voltage for the 12 volt batteries.   I ran them for 6 hours
>>> and the storage indicator was telling me 40% full.  Voltage was 44.3
>>>
>>> Rick,  this is the battery charger I have:
>>> https://www.batterypete.com/chargers/golf-carts/delta-q-quiq-48-volt-18-amp-912-4800/?gclid=Cj0KCQiAqY3zBRDQARIsAJeCVxP7pOTpKjANY_Z4leDJMXsag_kgsFsDIKImLms-Qd7CIh43hEoq7_oaAruDEALw_wcB
>>>
>>> Brian
>>>
>>>
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: David Colombo via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sat, 7 Mar 2020 21:02:11 -0800
>>>
>>> Brian, are you running them from your actual batteries? Are they deep
>>> cycle lead AGM, or LIPO4? What's the cut off voltage?
>>> David
>>>
>>> On Sat, Mar 7, 2020, 7:58 PM Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> It's been 4 hours now and my voltage is at 46.44 volts
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 15:48:43 +1300
>>>
>>> Hi Brian,
>>> 3hp is 2,200W, so 500W with no load seems excessively high.
>>> Just measured mine & it's .9Amps (900mAh) for a 1500W compensated motor
>>> running in a 5cst silicone oil. Running off 48V also. So under 49W.
>>> I think you have a large prop on your motors. I just saw your gearing
>>> ratio, but the
>>> loss shouldn't be that much.
>>> I would test them individually in case one is at fault.
>>> Cheers Alan
>>>
>>> On 8/03/2020, at 2:54 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> Alan,             They are 3 hp golf cart motors, true there is no load
>>> but If I kept the same amp draw while actually at sea then it seems it
>>> would be equivalent.     Under actual conditions it would probably be going
>>> very slowly while drawing 21 amps ( 10.5 amps per motor ) .
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 14:21:54 +1300
>>>
>>> Brian,
>>> I take it that there is no load on the motor!
>>> That seems a high power consumption, 500 Watts per motor.
>>> Have you got the specs for those motors? Have you checked them
>>> individually?
>>> Alan
>>>
>>> On 8/03/2020, at 1:26 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> There are some times when 110 vac could be needed, like computer stuff.
>>>  Just a thought, we can have an open mind on the subject !
>>>
>>>
>>>   Right now I'm running my motors to see how long they'll go.  It's a
>>> kind of cool rainy day so the temperature is close to what the ocean would
>>> be .   I've got the oil expansion tube going into a bucket so I can get an
>>> idea how large of a reservoir I will need to take care of the expansion.  I
>>> think I'm going to opt for just a reservoir on the motor side and then I'm
>>> running a hose up high and then back down to take care of the compression
>>> up the tube for when I submerge.  Since most of the compression of air will
>>> occur in the first 30' the water should never get high enough ( in the
>>> tube) to go over the hump and get into the motor compartment.   So the
>>> whole system will be open .    I'm also monitoring Voltage ,  Amp draw, and
>>> ,  Watts     48 volts       21 amps       1030  watts    - two motors
>>> running  .
>>>
>>>
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: hank pronk via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org
>>> >
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 00:06:47 +0000 (UTC)
>>>
>>> Why complicate a simple solution?  this works great!  Bad Brian!
>>>
>>> Hank
>>>
>>> On Saturday, March 7, 2020, 4:59:49 PM MST, Brian Cox via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>
>>> There are a lot of 110AC led's out there , it would be a simple matter
>>> to run a DC inverter to make 110ac voltage ,  I wonder if there would be
>>> any advantage to that,  there might be some better quality led's that are
>>> made for AC voltage, Any thoughts on that?
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: hank pronk via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: [PSUBS-MAILIST] (no subject)
>>> Date: Sat, 7 Mar 2020 16:30:26 +0000 (UTC)
>>>
>>>                             15:13 Now playing Watch later Watch later
>>> Add to queue Add to queue
>>> <https://www.youtube.com/watch?v=dHDUilUO6P8>
>>>
>>> How To Make An Underwater Submarine LED Light Bar
>>>
>>> In this video I am converting an everyday LED light bar into the deep
>>> diving, oil filled, underwater light bar t...
>>> <https://www.youtube.com/watch?v=dHDUilUO6P8>
>>>
>>>
>>>
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