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Old 07-08-2015, 03:41 PM   #1
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Location: Keizer Oregon
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Batteries Dead after 2 weeks

Brand new FR3 30DS with 14 miles on it...
I went out of town for a couple weeks and today I had to get something out of it.
I had not flipped the disconnect switch to kill all the power, but everything was turned off. When I left, the batteries were fully charged and the coach was unplugged.
The weather up here in Oregon has been hot... mid 90's (hot for here)
When I opened the door, I Heard a clicking sound from somewhere under the coach by the steps.... but the steps would not come out or extend.
I crawled up in the coach and went to the control panel by the bathroom. everything was dead. I checked the lights... dead...

I put the key in the ignition and started the engine, and I heard a clicking noise (mid coach)... With the engine running I went back to the control panel and everything was functioning normally now. I checked the steps and they went out... I checked the battery level and it says 75% charged...

I turned off the coach and everything is functioning normally still.

I called the service shop where I bought this thing and they guy there says that I should have turned off the battery disconnect switch... he said the batteries can be discharged by the electronics and the Co2 sensor...
I call BS.... there is no way that those two things could discharge those batteries in less than 2 weeks....

My questions....

Is there a safety shut-off for the batteries if the coach is not being used and it gets hot (think mid 90's)?
Has anyone ever experienced this before and what did you do?

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Old 07-08-2015, 03:59 PM   #2
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I have owned 12 Rv's including 3 diesel pushers and I have never seen a auto battery disconnect that disconnects the battery when they reach and certain level of discharge. Every battery disconnect I have ever had (or seen) is a manual switch that cuts the 12v off when manually toggled. Also, the best way to find out what's draining the batteries is to put a meter across each fuse and read the level of "draw" on each/all circuits. This will tell you exactly which circuit is drawing from the battery and how much the draw is.

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Old 07-08-2015, 04:02 PM   #3
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Turn off your battery switch and your batteries will not go dead!
The RV mech was correct.
It's common.
Sometimes the easy answer is the correct one!

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Old 07-08-2015, 04:05 PM   #4
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Originally Posted by KyDan View Post
Turn off your battery switch and your batteries will not go dead!
The RV mech was correct.
It's common.
Sometimes the easy answer is the correct one!

Happy Trails!

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Old 07-08-2015, 04:07 PM   #5
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With the LP detector and the vampire loads in the radio and such you easily have a half amp load, I would guess more. So if you take the half amp per hour times 24 hours you get 12 amp hour per day of load. If you are gone 14 days that is a total load for that time of 168 amp hours. Most units only have one battery so you may only have 105 amp hours in the battery. So yes you would be deader than a door nail in that period of time.
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Old 07-08-2015, 04:11 PM   #6
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Put a battery tender on it, plug it in to shore power or add a disconnect switch. Two weeks of parasitic draw will kill the battery.

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Old 07-08-2015, 05:49 PM   #7
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The service tech is correct. I've had my batteries go dead after a couple of weeks. Unless you switch off the battery disconnect, you'll have a small drain. When I know we're not using the coach for a while I always either plug into my shore power or use my battery tender.

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Old 07-08-2015, 05:53 PM   #8
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Originally Posted by TURBS View Post

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Old 07-08-2015, 08:00 PM   #9
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CLRs math is correct. And (on my 30Ds) the vampire loads are not off when you shut off the switch. The LP gas safety solenoid is a good example.

Even if you shut off the switch these loads will drain the coach batteries.

If yo cant plug in via the cord use a battery tender that will trikle charge the house batts. The unit comes with an plug that can be connected permanently to make it easy to quick disconnect.

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Old 07-08-2015, 08:57 PM   #10
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would starting the motor every day mitigate this drain, how long should the motor run? In storage conditions, do you disconnect batteries?

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