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Old 12-05-2015, 09:58 AM   #1
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Unhappy Tired of ruining batteries!

As hard as I try, sometimes I forget to hit the battery disconnect switch after I bring the coach home from a trip (you get in late, have to unpack in a hurry, yada yada yada) and I go back in a few days to find my battery at less than 8V, which is basically 0% charged. I have ruined more than one battery this way, and I may have just ruined (or certainly damaged) a $200 Trojan AGM deep-cycle battery. I am tired of this.

I am hoping I have a solution. I have ordered a Powerwerx Compact Low Voltage Disconnect (LVD) Battery Guard which will supposedly shut off the system if the battery drops to a user set voltage (it ignores starting load voltage drops) and reconnects automatically when the voltage reaches 12.6V.

The item cost $99 with shipping, which is a lot cheaper than a good battery, and I hope it can save me from my own carelessness.
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Old 12-05-2015, 10:04 AM   #2
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Get some of these:

RVminders, Set of 10 - Vortex Media RVMX - Automotive Accessories - Camping World
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Old 12-05-2015, 10:14 AM   #3
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There's a problem with this device in that you can't draw more than 35 amps through it. Your slideout, levelers, inverter (depending on what you're powering), or awning (if electric) will exceed this current rating.
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Old 12-05-2015, 12:50 PM   #4
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Start with a reminder system that will work, like a big piece of butcher paper on the wall that says disconnect the batteries.

Second find out what is drawing down your batteries.

Third install a good battery recharging and maintenance system, after having your batteries evaluated.

Be sure to maintain the battery fluid levels and keep the connections, clean, dry, and tight.

As preparation for all this, there are lots of articles on the internet on these subjects to up skill your knowledge base, including those on basic electricity.
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Old 12-05-2015, 06:54 PM   #5
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I forget at least one thing every time. So, I made a checklist with about 25 items on it. Its laminated and in the car's glove compartment. When we leave the DW reads the items off and I fix something if I forgot. Haven't missed a thing yet and it only cost me 10 cents...
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Old 12-05-2015, 08:37 PM   #6
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Not sure why discharging a deep cycle battery ruins it. Put it on a charger as soon as you remember, plug it in when not in use, part of parking the unit.
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Old 12-05-2015, 09:22 PM   #7
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I second the "checklist" idea.... I see pilots who take-off and land sometimes 5 or 6 times a day using checklists for EVERY take-off and landing. There is something to that.....
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Old 12-06-2015, 06:03 AM   #8
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If your unit is home with you, spend a little and get an outlet installed so that you can plug it in when you get home. Plug ours in as soon as we park it and never have a problem. I think I may have replaced a battery once in 30 years of trailering.
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Old 12-06-2015, 08:04 AM   #9
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A small solar panel hook up might just be the ticket to keep the unit charged when not in use. Should at least offset the gas detector draw and whatever else is still running\on when parked.
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Old 12-06-2015, 08:20 AM   #10
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Quote:
Originally Posted by hoppers4 View Post
There's a problem with this device in that you can't draw more than 35 amps through it. Your slideout, levelers, inverter (depending on what you're powering), or awning (if electric) will exceed this current rating.
We shall have to see about that. The device accommodates starting loads, so maybe it will handle them

Quote:
Originally Posted by RodgerS View Post
Second find out what is drawing down your batteries.
Third install a good battery recharging and maintenance system, after having your batteries evaluated.
Be sure to maintain the battery fluid levels and keep the connections, clean, dry, and tight.
The unit draws 300 milliamps when nothing is on except the CO/propane detector. Other people have said that is pretty normal. It takes at least 10 days to run the battery down if I forget the cutoff. Also, as I said it is an AGM battery, no fluid levels to check - and I check and maintain the connections regularly

Quote:
Originally Posted by namusmc65 View Post
If your unit is home with you, spend a little and get an outlet installed so that you can plug it in when you get home. Plug ours in as soon as we park it and never have a problem. I think I may have replaced a battery once in 30 years of trailering.
I am only able to plug in for the six months of the year we are up North(hence the name "Snowbird47") when I am in Florida I have to park it in a storage facility with no electricity

Quote:
Originally Posted by Fairenatic View Post
A small solar panel hook up might just be the ticket to keep the unit charged when not in use. Should at least offset the gas detector draw and whatever else is still running\on when parked.
See statement above about being in a storage facility. It would be difficult to put out solar panels due to space and thievery considerations. Besides if I could remember to put out panels I would remember the cutoff
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