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Old 11-08-2015, 08:23 PM   #1
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Batteries cooked

I have a 2013 Sunseeker 3170DS, Last winter I left the unit plugged in to 30 amp power, in it's enclosed garage, for approximately 2 weeks and found the unit full of odor, battery, and alarm chirping. Batteries were cooked. WHY ? I thought motorhome could be left plugged in to outside power indefinitely and would be OK. Replaced batteries and now afraid to leave unit plugged in. I always get better advice on this forum than calling the dealer
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Old 11-08-2015, 08:29 PM   #2
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I had the same problem. Toasted 3 batteries that were less than a year old. I now use only a small battery maintainer for storage. Small maintainers cannot over charge your batteries because they only supply a small amount of current.

This is the unit that I use:

http://www.amazon.com/Yuasa-YUA12010.../dp/B00HZTDKZG

The "Battery Tender" brand has failed in service for two friends, so I chose the Yuasa brand since they make excellent batteries for motorsports.
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Old 11-08-2015, 08:35 PM   #3
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If the charger is not "smart" you will cook them like hotdogs.. Need to see what model your converter is the see how smart ut is..

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Old 11-08-2015, 08:57 PM   #4
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Okpete, since your unit is a 2013 you probably have a WFCO converter. In my opinion they don't do a real good job of conditioning or charging your battery. Foresters and Sunseekers now use the Progressive Dynamics converter and transfer switch. In storage mode the voltage drops to 13.2 volts so as not to overcharge the batteries. Also, every 21 hours for a period of 15 minutes it charges at 14.2 volts which prevents battery stratification & sulfation - the leading cause of battery failure per the manufacturers literature.

http://www.progressivedyn.com/pd4600...placement.html
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Old 11-08-2015, 09:01 PM   #5
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First thing I change on all of my campers is replace the power converter/charger with a Progressive Dynamics Intellicharger with smart wizard pendant....never had an issue with overcharging when camper is brought home and plugged in.
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Old 11-08-2015, 09:14 PM   #6
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The WFCO converter does not have a maintenance mode. The lowest level is essentially a trickle charger which will slowly boil off battery water. Once the water gets low the battery will cook. You have three choices.
1. Replace the converter with Progressive Dynamics converter.
2. Use a Battery Tender (TM) to maintain batteries.
3. Use the WFCO converter, but check battery water ever 2-3 wks.
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Old 11-08-2015, 09:37 PM   #7
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2016 Solera 24 R Batteries are NO NAME!!!

Quote:
Originally Posted by OKpete View Post
I have a 2013 Sunseeker 3170DS, Last winter I left the unit plugged in to 30 amp power, in it's enclosed garage, for approximately 2 weeks and found the unit full of odor, battery, and alarm chirping. Batteries were cooked. WHY ? I thought motorhome could be left plugged in to outside power indefinitely and would be OK. Replaced batteries and now afraid to leave unit plugged in. I always get better advice on this forum than calling the dealer
My post is about my batteries which are just over 8 months old Have a Dec 2014 sticker)! The RV was delivered in early July 2015.

I had to remove the batteries to re-arrange the battery Box; the wires almost completely covered the water vents.

But BOTH batteries are showing signs of over charging (the cases have small bulges,

But what really makes me angry is that they are NO NAME! They are not any name Brand, there are absolutely no markings except some small numbers in the plastic! No Amp Hour ratings, No Nothing!

You pay $100 Grand and FR gives you #$%%^&&** batteries!

Really sucks!

sanpedroflyer
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Old 11-08-2015, 09:38 PM   #8
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It's all about the bottom line...

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Old 11-08-2015, 10:02 PM   #9
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Thanks for all the good info, I agree with 'flyer, spend a bunch and get no name batteries and a converter that cooks them. Seems very odd. So here is another question, can you leave the batteries in place and use a battery tender? If so, I woulg assume you connect tender to coach posative onone battery and negative on second battery ?
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Old 11-14-2015, 06:20 PM   #10
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I wouldn't worry about which positive and which negative post to which to connect the battery maintainer. The current is small and the cables connecting the batteries together are large so the difference in current going to the batteries will be neglible.
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