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Open Roads Forum  >  Tech Issues

 > Deep cycle battery maintenance

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naturist

Lynchburg, VA

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Posted: 09/14/20 06:12pm Link  |  Quote  |  Print  |  Notify Moderator

Don’t need a watering system. Those are for helpful for folks with multiple batteries in a hard-to-reach place. Waste of money for us mortals with one easy to reach battery.

Don’t sweat it. If you check the water frequently you are good.





KD4UPL

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Posted: 09/14/20 06:54pm Link  |  Quote  |  Print  |  Notify Moderator

Just keeping the water above the plates is a dangerous gamble. If those plates ever see air it will ruin a battery in a hurry. As has been stated, the water needs to be at the bottom of the fill tube. This allows a bit a reserve. I suspect your batteries need water to achieve this level.

wa8yxm

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Posted: 09/15/20 04:54am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

Add distilled water until it just reaches the bottom of the fill tube. Do not fill to the top of the case/cap. This allows for a adequate reserve and for the battery to vent.

You can buy a battery filler bottle that will fill them to the correct level.


Uh that is overfilling you stop 1/4 to 1/8" BELOW the bottom of the fill tube.. You have to give it "Breathing room".

If you dig enough you will find that on the better battery sites.
I grew up when flooded wet cells were all there were. The first Maintenance free were.. Just Coming out. and that is what they taught back when everybody used them.. Alas they forgot that with the modern maintenance free, which of course are nothing of the sort.


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2112

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Posted: 09/15/20 05:38am Link  |  Quote  |  Print  |  Notify Moderator

Fill per information provided on #6
Equalize at least once per year per #10
#12 will tell you the general health of your batteries. Check them with a hydrometer a few times a year and equalize if needed
#14 and 15 is good info. Fully charge as soon as possible

Mine is plugged in 24/7 and my junk converter/charger holds a constant 13.6V, which is too high for float charge. I put a timer on my battery that allows it to charge 2 hours every 5 days just to keep it topped off.


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StirCrazy

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Posted: 09/15/20 07:51am Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:



For MAXIMUM battery life, I believe that lead acid batteries should NOT be on a charger 24/7 ! 4 - 6 hours per day on a "maintainer" is plenty.


shoot, some one forgot to tell my batteries that. they have been plugged in for the last 14 years and are just starting to show there age this year..

Steve


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BFL13

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Posted: 09/15/20 10:03am Link  |  Quote  |  Print  |  Notify Moderator

If you do get to where the water is low but plates still covered and do a really big refill, how long before the SG ever comes out right again? Say you don't do a deep cycle but just a few hours of high voltage--which doesn't do much for the SG, then go on a 13.8v float.

Days, weeks?

Or do you have to do a deep cycle or two?


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MEXICOWANDERER

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Posted: 09/16/20 07:30pm Link  |  Quote  |  Print  |  Notify Moderator

Jeezo

Try constant voltage after max specific gravity that has been reached of about 600ma per 100 amp hours at 20c

wnjj

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Posted: 09/16/20 07:39pm Link  |  Quote  |  Print  |  Notify Moderator

Our camper has a single group 29 battery and a PD9245 charger. It has been plugged in every minute since 2006 that it wasn't on camp trips. The cheapo Interstate battery lasts at least 6 years before noticing a little loss of performance. I have never once added a drop of water. I quit checking when it was never low.

For our setup/use, "maintenance" is pretty much nothing.

Veebyes

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Posted: 09/17/20 10:48am Link  |  Quote  |  Print  |  Notify Moderator

There is no need to keep a battery on trickle charge 24/7. If the trailer is 12V 'dead', no parasitic drains, the battery will hold charge for months without attention. Just be sure it is put into hibernation fully charged & watered.

Think about it. Farmers & construction companies leave machinery untouched for months at a time in the harshest of conditions. Doubt if they think about the well being of batteries anywhere near as much as the average RVer.


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MEXICOWANDERER

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Posted: 09/17/20 03:22pm Link  |  Quote  |  Print  |  Notify Moderator

LOVE IT
Made a lot of money off that philosophy

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