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Old 03-08-2015, 09:35 AM   #11
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I use the disconnect swith whenever it's in storage. Solar array and controller keep it float charged. Also keep bottle of distiller water in power room and check periodically. I don't find monthly water is needed through, about every 60 days is about right for mine.

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Old 03-08-2015, 09:46 AM   #12
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To get back to the OP title 'Parasitic draw on battery' ... am I alone in thinking 7.5A he found is not the usual parasitic draw of things like radios and CO detectors?

If this were my trailer, I'd find the cause of that 7.5A draw. Something seems wrong to me to have that much draw. Am I off base in this??

To me, deciding to leave the trailer plugged in or not while in storage would be a secondary issue.

Originally Posted by Dgrdale2000 View Post
MRB 20 Manual says not to leave it plugged in all the time while in storage or batt may get overcharged. But after a couple weeks unplugged, batt goes dead. No, brakes aren't on. Nothing is on. Other than co alarm. I figure all parasitic draw should be maybe .5A, but it's 7.5A! Pulled fuses one by one and found the 30A fuse labelled "Charge line, slide motor" is the culprit. With that fuse pulled, the draw is only about .5A. I wouldn't think the slide motor would do it.Can anyone tell me why the charger would?

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Old 03-08-2015, 09:51 AM   #13
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seems high to me ... I know the co detector takes a little but seems excessive ... like I said the backlight on our stereo stays lit and that's why I disconnect while not in use... with the tongue jack being electric I hate the thought of going to get it and having a dead battery... would make it a pain .. even at .5 amps figuring amp hours on battery over 3 or 4 weeks battery is going to be dead
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Old 03-08-2015, 10:41 AM   #14
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Thanks All!

Being new to the site I'm not sure if I am replying to you all who have answered my thread, but anyway, thank you all so much!
I have a 20MRB Whitehawk.
I have installed a 160 A/H Exide 4DMDC battery with 250 Reserve Hours.
I'm going to check the components on the 30 amp circuit and see which is the culprit and determine if that is normal if I have to contact the mnfturer. If it is, I'll install either a kill switch for that component, if practical, or a battery cut-off switch.
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Old 03-08-2015, 11:09 AM   #15
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Yes, I agree that 7 amps is not a parasitic draw and needs attention but the only way to stop it is to open the battery manually or with a switch.

Some parasitic loads can't be turned off.

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