Battery goes to “low” while operating slides

[livinthelife]

Hmmm.... first post, just joined today....

 

[triplethreat]

View attachment 114614

Hmm, I wonder how many batteries from the Mid and late 1900s are still in use today......kind of settles the debate huh!

 

[coglesby]

This is why you can't trust everything you read on the internet.

The Concrete Truth About Batteries Stored on Concrete

Have you heard the one about batteries discharging when stored on concrete? Apparently, some people have taken to storing 12V batteries—the kind used in electric wheel chairs and emergency lighting systems—on wooden shelves to maximize their life expectancy. Is there a spark of truth to this or...

www.mcgill.ca

What? I thought everything on the internet was fact? LOL

 

[coglesby]

I bought a bluetooth battery monitor on amazon so I can keep an eye on the battery charge. I mostly was interested in knowing how the battery was holding up while towing, but it works great for monitoring all the time.

 

[Detpilot]

I have a newish 12V AGM battery. I keep the battery on a maintenance charger in the garage between all trips (dismounted from the trailer). On recent trips the battery readout on the control panel goes to “low” when operating the slides. It starts showing fully charged, then drops slowly, and the trailer is connected to shore power at the time. I took it to Advanced Auto and had them put it on their tester, which showed the battery if okay.
Comments (constructive, please) appreciated.

Please forgive me if this is too basic for you. But, the battery charge status lights are only indicating voltage. When you're moving the slides, you are taking current from the battery so the voltage (pressure) drops. As soon as you stop moving the slides, the battery voltage will recover if the batteries are healthy, and you should see "good" or "charged" again. If this is what you're observing, it's perfectly normal.

 

[Scott'n'Wendy]

Hmmm.... first post, just joined today....

To be fair, it is a belief that still holds with a lot of people.

 

[Rabbit]

Thanks for the mostly helpful comments, and the concrete education. I’ve concluded my situation is normal.

 

[wrsadler]

I have the same issue. While on battery and operating the slides, everything works. If I go back in a couple of days the battery is dead, even with solar system that came with camper. If I plug into 30a everthing works great. If I unplug the 39a service it starts over again.

 

[Bungy]

If I go back in a couple of days the battery is dead, even with solar system that came with camper.

Obviously the oem solar is too small to keep the battery(ies) charged.

 

[Butcher]

Or, there is a large draw the RV should not have.

 

[wrsadler]

I had the battery checked last night and it was bad.

 

[redfernclan]

One thing I ran into when I bought the trailer. It had one 100 amp hr battery group 24 I think. Wanted to upgrade to AGM and had them put two in. After getting it home, found the AGMs were 75 amp hrs so instead of doubling my capacity, I only increased it by 50%. Just let it be because it was still better than having to ad water or getting corroded terminals.
My point is if you only have one AGM and its rated for 75 anp hrs, Thats not much reserve, but it sounds like you have already figured it out.

 

[wrsadler]

Replaced the battery, all is good.

 

[RV2600RB]

When charging the battery outside the trailer, make sure the battery is on a block of wood. If on concrete it will drain from the battery.

When charging the battery outside the trailer, make sure the battery is on a block of wood. If on concrete it will drain from the battery.

Totally false. Don’t believe everything you read on the internet.
Rich

 

[Butcher]

This rumor was around way before the internet.

There was a time where it was true, but that was before they had plastic cases.