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Old 05-21-2013, 04:31 PM   #1
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Plugged in to shore power while in storage.

I finally fond a great storage facility for my 2005 Airstream motor home. Fully enclosed with doors at both ends for an easy drive through. I have 110V shore power and would like some thoughts on plugging in to keep the batteries charged. The plug is probably no more than a 20 amp. I have a 50 amp to 30 amp pig tail and assume I can use a 30 amp to regular 3 prong adapter for my extension cord. What do I need to do other than this. I have a "storage on and off " switch that kills the power from the batteries. Should this be turned off or left on. Thanks for your help.
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Old 05-21-2013, 04:35 PM   #2
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If you're plugged in and the converter or inverter is on , leave the batteries on as well.
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Old 05-21-2013, 06:59 PM   #3
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Leave the battery cut off on and visit the coach at times to check the water unless you have AGM OR CELL batteries.
COACH POWER SYSTEMS
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Old 05-21-2013, 08:24 PM   #4
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Congrats on finding such a great storage facility.

I'd leave it plugged in with the battery cut off switches left "on" so the batteries are still connected. As Cliff said, make sure your inverter/charger is also on and that the batteries are taking a charge. Then, check it out every month or so to check the water in the batteries.

You need to determine also, if your chassis batteries are charged while on shore power. If not, you probably want to throw the chassis battery cut off switch to "off".

Good luck.

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Old 05-21-2013, 08:32 PM   #5
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Quote:
Originally Posted by 007";1576001]Leave the battery cut off on and visit the coach at times to check the water unless you have AGM OR CELL batteries.
[URL="http://www.marxrv.com/12volt/12volt.htm
COACH POWER SYSTEMS[/URL]
Or you could put mineral oil in each cell, 2 oz (for 12 V) or 4 oz (for 6 V) batteries. This will cut way way down on water adding as well as corrosion around the batteries.
I did it years ago and the batteries lasted one month short of 10 years and still were usable.
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Old 05-22-2013, 07:44 PM   #6
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Be sure you have a 'smart' charger, a normal charger will fry your batteries. The 'smart' charger senses when they are charged and reverts to a trickle charge.
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Old 05-23-2013, 04:28 PM   #7
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Be sure you have a 'smart' charger, a normal charger will fry your batteries. The 'smart' charger senses when they are charged and reverts to a trickle charge.
I have a new just installed Xantrex Freedom 458 Series Inverter/Charger. I now have the coach plugged in with 15 amp 50/30/15 amp adapter with the battery cut off switch left on. Everything seems to be working fine. Thanks for everyone's input.

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Old 05-23-2013, 07:40 PM   #8
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I leave mine plugged in, with the "use/store" switch in the store position.
This prevents any parasitic drains, and the batteries still get a charge thru the inverter. Been doing it for three years, stored 5 months at a time during
the winter months. Have AGMs.
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Old 05-23-2013, 07:52 PM   #9
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Battery switch 'on' to allow for the converter charger to charge the batteries.

Several people have stated 'inverter on'. This is not correct. An inverter converts 12VDC to 120V AC. All inverters, including inverter/chargers have an on/off switch for the inverter function of the system. Leave it OFF. It will drain down the batteries, causing them to over-charge, possibly boiling down the batteries.
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Old 05-23-2013, 07:58 PM   #10
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I would also change the setting on your inverter remote to reduce the input voltage to 20 amps from 30 amps. That way the converter won't be trying to overload the 20 amp circuit especially if you were to turn something on inside the coach while you were there.

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Old 05-23-2013, 09:52 PM   #11
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I leave ours on 24/7 when @ home, never have had a problem in the past 7 yrs. I also check the battery's monthly, it's a must. Amazing it still has the original house battery's/ 2 Trojan T-105's. Good luck and travel safe.
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Old 05-23-2013, 10:09 PM   #12
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Quote:
Originally Posted by Pusherman View Post
Battery switch 'on' to allow for the converter charger to charge the batteries.

Several people have stated 'inverter on'. This is not correct. An inverter converts 12VDC to 120V AC. All inverters, including inverter/chargers have an on/off switch for the inverter function of the system. Leave it OFF. It will drain down the batteries, causing them to over-charge, possibly boiling down the batteries.
Doesn't seem to work that way. I've had our inverter on 24/7/365 when stored at home (for up to 6 months straight). The house batteries (4 - Interstate U-2200's) lasted one month short of 10 years. I changed the starting batteries earlier as I thought they were bad but it turned out to be a bad starter.
I did put 4 oz of mineral oil in each cell of the Interstates which cut way down on the maintenance and corrosion.
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Old 05-23-2013, 10:11 PM   #13
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I would also change the setting on your inverter remote to reduce the input voltage to 20 amps from 30 amps. That way the converter won't be trying to overload the 20 amp circuit especially if you were to turn something on inside the coach while you were there.

Dr4Film ----- Richard
Mine will go down to 5 amps so that's what I (if I remember) set it for when sitting at home.
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Old 05-24-2013, 08:41 AM   #14
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Mine will go down to 5 amps so that's what I (if I remember) set it for when sitting at home.
Good point Mr D.

I had to look at my remote display to see what the range was for amp's and mine is the same, 30 amps - 5 amps in 5 amp increments.

it's been a very long time since looking at it and since we are ALWAYS parked at home wherever that may be we seldom are hooked to anything less than 30 amps.

BTW, did you ever receive my message regarding the Banks Power-Pack system?

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