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Old 09-10-2021, 05:24 AM   #1
Campy
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Battery draining issue

We went on a camping trip for over a week with no issues at all. Came home and parked the camper and in just a couple of weeks the battery is flat. I charged it up and turned off the master switch and dead battery again. Turns out the master switch don't turn everything off. Any ideas what could be a major drain or possibly the built-in charger itself, I had one in a class A fail and drain the batteries.
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Old 09-10-2021, 06:12 AM   #2
notanlines
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Campy, your battery being drained in a matter of 10 days to two weeks is very normal, right on target. A number of things are designed to be operative 24 hours a day so they are wired direct to your battery. Smoke alarms that might be part of your system, carbon monoxide sensors, AM/FM radios are but a few I'll mention. Your only alternative is to install a direct cut-off on either the hot or ground cable on your battery itself. I've included a site with an example, one of probably fifty or more that will do the job.
https://www.amazon.com/dp/B08FLXDBG6...d-fa30b367fac6
I might add that your particular battery is more than likely on it's last leg after having been run down flat a couple times. Might look into that.
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Old 09-12-2021, 06:13 PM   #3
GHen
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X2, it’s normal for the battery to be dead in 2 weeks. Yes, stupid.

I also added a full battery cut off and don’t use the factory disconnect. Just remember to turn it on while traveling, it powers your emergency trailer brakes.
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Old 09-13-2021, 03:58 AM   #4
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You could run a 15A power cord and connect to your trailers power cord via adapter or put a 12V float charger with extension cord next to your battery and keep it charging. I have no battery cut off switch in my old camper and that is what I am forced to do so the battery doesn't get drained.
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Old 09-13-2021, 06:10 AM   #5
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Look to your radio inside the camper. A lot of these have the "time" on them, so as a result a lot of them don't disconnect from a master switch, even if your lucky enough to have one. If it has the time, or blue glowing led lights, or anything of the sort, I would bet this is the parasitic drain causing your battery to go flat.

Very easy to wire a switch up to this sort of thing to remove it from the battery if you need to. The CO2 or propane detectors also have a "light" on them (and probably other functions they are doing) that can cause a similar drain.
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Old 09-13-2021, 08:58 AM   #6
GHen
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Smoke detectors, Co2 detector, a leveling system, trailer brakes all can draw power even with the factory disconnect. Too many government regulations tied to its design has caused it not to function as intended, just like the government, lol.

On top of that the factory disconnects are subject to being miss wired by the factory, that was the only warranty issue on my rig.
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Old 09-13-2021, 12:18 PM   #7
Campy
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Battery should be ok according to Interstate, it's a deep cycle and designed to be run down and charged back up. Leaving them dead is what damages them. I have since installed a main shut off in the front near the battery that will shut down everything.
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Old 09-13-2021, 06:32 PM   #8
flybouy
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Would be interested in which Interstate battery you have.
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Old 09-14-2021, 03:54 PM   #9
NH_Bulldog
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I don’t believe that Interstate has any true Deep Cycle batteries. They may say Marine/RV Deep Cycle, but they list CCA and CA (cold cranking Amps and cranking amps) which is not a real Deep Cycle. You should never get below 50% state of charge (some say no less than 80%). Anything below that drastically shortens the life of the battery and may not ever take a full charge again.
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Old 09-14-2021, 04:54 PM   #10
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Quote:
Originally Posted by Campy View Post
Battery should be ok according to Interstate, it's a deep cycle and designed to be run down and charged back up. Leaving them dead is what damages them. I have since installed a main shut off in the front near the battery that will shut down everything.

Campy what kind of battery is it that you have? The only true deep cycles Interstate has are the GC2s. They do now have the EFB (enhanced flooded battery) line that do offer more reserve capacity but also still retain the CCA ratings which means they are still a hybrid. Here is a link to what discharging a hybrid battery does to its life (see page 4):

https://www.intechtrailers.com/image...nce-Manual.pdf

Whoever told you the battery "should be OK" meant you can recharge it and it's not dead and won't come to life again. The problem is that the times it will "come to life" is cut short by about 90% if it gets fully discharged.

My dealer pulled the breakaway switch on my trailer while they were working on it and left it until it killed both new Interstate batteries. They charged them and told me they were "OK". I showed them the chart in the link and told them they had ruined the life of the batteries and I wanted new ones....they were replaced.
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Old 09-14-2021, 05:11 PM   #11
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Quote:
Originally Posted by sourdough View Post
Campy what kind of battery is it that you have? The only true deep cycles Interstate has are the GC2s. They do now have the EFB (enhanced flooded battery) line that do offer more reserve capacity but also still retain the CCA ratings which means they are still a hybrid. Here is a link to what discharging a hybrid battery does to its life (see page 4):

https://www.intechtrailers.com/image...nce-Manual.pdf

Whoever told you the battery "should be OK" meant you can recharge it and it's not dead and won't come to life again. The problem is that the times it will "come to life" is cut short by about 90% if it gets fully discharged.

My dealer pulled the breakaway switch on my trailer while they were working on it and left it until it killed both new Interstate batteries. They charged them and told me they were "OK". I showed them the chart in the link and told them they had ruined the life of the batteries and I wanted new ones....they were replaced.
Words like “ok” and “ fine” never instill much confidence
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Old 09-14-2021, 05:47 PM   #12
flybouy
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Originally Posted by jasin1 View Post
Words like “ok” and “ fine” never instill much confidence
Sometimes dealers use those terms as a polite way to say "shut up and go away". JMHO
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