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02-22-2010, 08:00 AM
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#1
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Rivet Master
2006 25' Safari FB SE
Spokane
, Washington
Join Date: Sep 2009
Posts: 1,858
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Parasitic Drain
Have a simple question. If you hook up two fully charged 12 volt batteries and switch over to "store" mode, how long before the batteries are drained? I have a 2006 25 FB and it is new to me having just picked it up last October. I noticed that even in store mode, some of the monitors are still functioning from the lit led lights visible.
On my SOB trailer, I had a battery disconnect switch which did exactly that. No drain there at all.
Thanks for your expert advice in advance.
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02-22-2010, 08:07 AM
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#2
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Retired.
Currently Looking...
.
, At Large
Join Date: Jun 2003
Posts: 21,276
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The "new" standards say things like the LP monitor can't be disconnected. Most people manually disconnect the batteries if the trailer is going to be stored for an extended period. Depending on the age and condition of the batteries, it could be anywhere from a few days to a couple of months before they are drained.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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02-22-2010, 08:32 AM
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#3
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Rivet Master
1973 27' Overlander
Currently Looking...
Jupiter
, Florida
Join Date: Apr 2006
Posts: 2,061
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Even with battery disconnected there will be a small and steady loss - the baseline for flooded lead-acid batteries is 1% "self-discharge" per day so depending on exact chemistry it could have 2% to 10% per week of its charge disappeared. AGM and Gel style batteries lose about that amount in a month.
Knowing that - its time to hunt down your accessories data sheets, just lighting an LED for 24 hours may be nearing a single watt-hour but there would be worse losses elsewhere...
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The days are short and the night is long and the stars go tumbling by.. . ~Airstream~
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02-22-2010, 05:54 PM
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#4
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Rivet Master
2006 25' Safari FB SE
Spokane
, Washington
Join Date: Sep 2009
Posts: 1,858
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Thanks
Thanks for affirming what I feared. The sun came out and it started to look like spring so I ran out and put my batteries in. The trailer is stored some distance away so I will more than likely go back out in a week or two and bring them back home. I can't wait for spring to actually get here.
Dick
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02-22-2010, 08:18 PM
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#5
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Rivet Master
Commercial Member
New Borockton
, Alabama
Join Date: Sep 2002
Posts: 1,593
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Expect about 15-20% self discharge per month. The LEDs are powered from DC so that can accelerate the discharge but not too much. Best to leave plugged in if you have shore power and a modern converter with a float mode or if not, a solar maintainer is the answer if you don't want to pull the batteries. Good luck.
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888-828-1893
Bestconverter.com
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03-14-2010, 05:48 PM
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#6
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3 Rivet Member
1978 28' Ambassador
Savannah
, Georgia
Join Date: Feb 2010
Posts: 237
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I have kind of the same question: new off the shelf dry cell. Installed 10 days ago. Tinkered around in the trailer for a couple of hours, but not burning all the lights. Today battery is dead. Brought it home and placed on small 12volt charger. How long should I leave it charging? How to check what its charge is? Do you think I have something drawing power even if all switches are off? Will not be able to connect 110 until next weekend...I hope. Thanks. Jack
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03-14-2010, 06:36 PM
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#7
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Rivet Master
2011 34' Classic
Westchester Cty.NY
, / Miami FL
Join Date: Jul 2007
Posts: 3,122
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was the battery charged before installation?
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Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
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03-14-2010, 06:46 PM
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#8
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Rivet Master
2008 30' Classic S/O
Dearborn
, Michigan
Join Date: Aug 2006
Posts: 1,403
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My trimetric reads a .15-.17 amp draw with the kill switch in the storage position. Even when the SRM-27 Interstates were 'new', with a full charge, within 2 weeks, they'd be 50% SOC.
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03-15-2010, 05:01 AM
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#9
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3 Rivet Member
1978 28' Ambassador
Savannah
, Georgia
Join Date: Feb 2010
Posts: 237
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Did not check to see if the battery was fully charged when purchased. Bought it at Sam's. It did have a 2/10 sticker on it, but it could have been there longer than that. Will take it back today and verify charge status. Thanks for advice. Jack
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03-15-2010, 09:23 AM
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#10
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3 Rivet Member
1978 28' Ambassador
Savannah
, Georgia
Join Date: Feb 2010
Posts: 237
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Left battery on 12volt charger for 12hours. Took it and had it checked. 580 amps on a 550 amp battery. Guess charger does work. Hooked it up to AS and lights back on. Thanks. Jack
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