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Old 09-21-2015, 09:05 PM   #15
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Originally Posted by CruizinDux View Post
Thanks idroba. I noticed in the bb3 picture two jumper battery post connections. Is this double up standard (looks like hot to neg needed for the series connection) because you're doubling the volts? My 2X12 connections have the same two cables for the pos to pos and neg to neg.

bob
Sorry for the confusion. The original setup of two 12 volt batteries had the short red and black jumper cables from one battery to the other, red for positive and black for negative. I simply re used them as the series cables from one 6 volt battery to the other. I had the two of them so I used both. Color makes no difference of course. Since when I use the 1000 watt inverter in my rig for the microwave or toaster, I sometimes draw up to 90 amps from the batteries. The double jumper gives more wire capacity than one would.

I also just remove those two jumper wires when I put the rig into winter storage as it is the easiest way to totally disconnect the batteries. Easier than disconnecting either the positive or negative cables and accomplishes the same thing.
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Old 09-22-2015, 09:31 AM   #16
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idroba, thanks. I suspected as much. It makes perfect sense, especially on the disconnect.

Re the top[ retrofit, I suspect this may vary depending on batteries installed but how much of an elevation increase in the top did you have to incorporate into the top retrofit?

I don't think the Interstates are gone, but suspect have been injured on the dealer's lot. I'm thinking of doing the top retrofit earlier than later, then this winter when I retire and we get some road time, I'll have some experience and data on the discharge/re-charge and be ready to move to the 6's if warranted.

Thanks for sharing all you knowledge and experience. It has accelerated my learning curve considerably.

Bob
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Old 09-22-2015, 12:30 PM   #17
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Originally Posted by CruizinDux View Post

Re the top[ retrofit, I suspect this may vary depending on batteries installed but how much of an elevation increase in the top did you have to incorporate into the top retrofit?


Bob
A 1.5 inch height increase will do it fine. All 6 volt golf cart batteries are the same size and footprint of the original group 24's you have now, but are about an inch higher. That is why the top needs to be raised (or the bottom lowered on AS's with a front compartment door).
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Old 09-22-2015, 05:08 PM   #18
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idroba, thanks again!

b
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Old 08-10-2016, 01:33 PM   #19
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And just a reminder, there are five areas that need to be checked for battery drain that have lights, but are sometimes overlooked: the rear storage compartment has a light, there is a light for the dump valves that I didn't know about for three years! Check yours. The jack light, and the roof antenna power switch. We have a light on the street side of our 19'ccd that I've not seen on another ccd. Make sure that is off when not in use.
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Old 08-10-2016, 09:43 PM   #20
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Great points crazylev...often overlooked and not checked.
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Old 08-14-2016, 10:23 AM   #21
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I've read and reread this and the others Idroba listed and I'm not sure with 2X12 batteries do I remove just the one negative terminal or can I remove the jumpers instead? My original OEM Lifeline's 8 year old batteries finally packed it in I believe. Had them on a trickle charger and yesterday they read 10.8. Need to buy new but think I'll go Interstate wet cells until full retirement in a couple more years when I plan on going the 6 V route.

Thanks Idroba for all the great information.

Mike
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Old 08-14-2016, 12:34 PM   #22
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Everyone, I thought I had referenced it in my post that included this thread but looking back I forgot to reference.

Unfortunately IRDOBA passed away last spring. He was very generous with his time and advice. This thread is just one of many that I have saved for future reference.

Rocket53 you may want to post your questions to the thread below.

Here is a recent thread re battery connections and the link to the discussion started on another thread.

http://www.airforums.com/forums/f449...ed-154343.html

I'd have to re-read IRDOBA's and Lewster's threads or maybe others to find the exact reference but based on that advice as I remember it I have been disconnecting the neg terminal and have had no parasitic draw problems. OTRA15 did ask the question (in the above thread #11 & 28) on disconnecting the interconnect on the neg side but I don't believe ever got an answer.

I have some work at the AS this week and have that question on my list. Certainly the nut for the interconnect (jumper) is much easier than disconnecting the post connection.

Bob
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Old 08-14-2016, 12:41 PM   #23
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If your battery connections are factory stock, the should be wired with the positive load to battery 1 and load negative to battery 2.

If that is the case, simply remove one connection from the parallel cable between the negative battery posts and that should act as a complete disconnect, as it will isolate the two batteries from each other.


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Old 08-14-2016, 02:15 PM   #24
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Lew...Perfect and as always a huge thanks
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Old 08-16-2016, 09:30 AM   #25
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You guys beat me to it.

I just spoke with customer service at Interstate Battery and they confirmed the above: If you have 2 batteries and the two jumpers (red and black) going from one battery to the other, you can just disconnect the Black one and that will eliminate any phantom draw. It will not stop the batteries from slowly draining if stored a month or two. In that case use a trickle charger.
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Old 08-18-2016, 10:08 AM   #26
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You guys beat me to it.

I just spoke with customer service at Interstate Battery and they confirmed the above: If you have 2 batteries and the two jumpers (red and black) going from one battery to the other, you can just disconnect the Black one and that will eliminate any phantom draw. It will not stop the batteries from slowly draining if stored a month or two. In that case use a trickle charger.
You have hit on one of the major disadvantages of liquid cells vs. AGM batteries; namely, their internal resistance and the associated self-discharge rates.

With their much higher internal resistance values, liquid lead acid batteries have a 12% (approx.) self-discharge rate. In contrast, AGMs like Lifelines have around a 3% self-discharge rate and will far outlast liquid cells when in fully isolated long term storage.

Lithiums are even lower in their self-discharge rate, and will easily last up to a year without boost charging when isolated.
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Old 08-18-2016, 04:38 PM   #27
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If your battery connections are factory stock, the should be wired with the positive load to battery 1 and load negative to battery 2.

If that is the case, simply remove one connection from the parallel cable between the negative battery posts and that should act as a complete disconnect, as it will isolate the two batteries from each other.


Lew Farber
Lew, did you have a brain fart? Removing the black jumper will not act as a complete disconnect.
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Old 08-18-2016, 04:45 PM   #28
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But removing both the red and black jumper would do so? [one end of each jumper that is]

Thanks
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