[AT] OK, oddball question...

[Rbrooks]

I buy these all the time from Amazon. They all come from China. I typically pay about $10-12. For them depending on the current rating. We use them in security camera systems. Typically either 48 or 24 to 12. But I have bought a couple of step-up versions to go from 12 volt DC system to 48 volt dc to power POE midspans for IP cameras

BOB

Sent from my iPhone

> On Jul 15, 2019, at 10:29 AM, Stephen Offiler <soffiler at gmail.com> wrote:
> 
> Bo, sounds like a fine idea to me.  30 amps is a pretty decent supply.  Here's a direct link:
> 
> https://www.buggiesunlimited.com/golf-cart/reliance-36v-48v-12v-power-converter-(universal-fit)/13-030 
> 
> 
> SO
>  
> 
>> On Mon, Jul 15, 2019 at 10:01 AM Bo Hinch <bohinch at gmail.com> wrote:
>> If it were me , I would use a voltage reducer like below that cost around $100.00 dollars and draws equal voltage from ALL the batteries never making any two batteries weaker than the others . I have installed many of them in my life time and years down the road , it pays off big time .
>> 
>> Reliance 36V/48V-12V Voltage Reducer/Converter (Universal Fit) on sale now from Buggies Unlimited . Normally 174.95 , sale price is 97.95 .
>> 
>> Just my opinion for whatever its worth .
>> Bo Hinch in S/W louisiana watching Berry as its passing through 
>> 
>>> On Mon, Jul 15, 2019 at 6:28 AM Stephen Offiler <soffiler at gmail.com> wrote:
>>> Hi farmer:
>>> 
>>> Batteries in parallel will try to equalize each other.  Yours, of course, are in series.  In a series string, if one battery is discharged, it will limit the performance of the whole string.  It will not be recharged by the other batteries however.  That's because you're trying to pull current from the whole string, and recharge requires a push in the other direction.  Your idea to feed recharge to the center two batteries will work fine *IF* you are very careful to isolate the whole thing from the golf cart chassis. Otherwise you'll have some unintended arc welding going on.
>>> 
>>> SO
>>> 
>>> 
>>> 
>>> 
>>>> On Sun, Jul 14, 2019 at 10:45 PM Indiana Robinson <robinson46176 at gmail.com> wrote:
>>>> One of my "old tractors" is IIRC about a 1996 Club Car 36 volt golf cart. With chevron tires (like tractor rears) they will get around well and will pull a lawn trailer about anywhere. I try to not over do it but I have in a pinch pulled one of my smaller tractors a very short distance or for a quick pull start.
>>>> It is as I said a 36 volt one using six 6 volt deep cycle batteries.
>>>> Now for the question... Hoping that some are better at theory etc. than I am. It's been a long hot day and my brain is in granny gear and I can't find what I want on-line. There are a number of golf cart accessories that operate on 12 volts like the back-up alarm, radio, lights, fan etc. You can pull 12 volts from any 2 adjoining batteries. I have read that you shouldn't draw too hard from any one pair or they will not always recharge evenly but apparently if those two do drop some power there is some balancing from the other batteries. Supposedly they try to find a common level with the weakest battery. (shrug)
>>>> What I want to know  is what would be happening if I were to connect a 12 volt alternator powered by a very small gasoline engine to feed 12 volts to the center 2 batteries? Would it move to the other batteries some?
>>>> Sometimes when we are working horse fences a lot we get might get a bit low on go juice when back in a back corner of the farm especially if running in deep snow. Not this week.  :-) 
>>>> I fed the question into my boiled brain and it came back "error 404, page not found"...  :-)
>>>> 
>>>> .
>>>> 
>>>> -- 
>>>> -- 
>>>> 
>>>> Francis Robinson
>>>> aka "farmer"
>>>> Central Indiana USA
>>>> robinson46176 at gmail.com
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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