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Posted 04 May 2011 - 11:12 AM
I have the motor home in an insulated enclosed garage. In the past few years (5 years ownership) I have kept it plugged into a 50amp receptacle. I have always had acid marks all around and underneath the batteries on a concrete floor. Recently I found the batteries to be bad and had to replace all 6 batteries...4 house, 2 engine. The RV mechanics told me the acid damage was from leaving the coach plugged in all the time, and overcharging the batteries. I don't think this was the cause, but I certainly don't want the same problem to arise, and I don't like the mess under the batteries. What is correct? I have it plugged into the 50 amp, the main disconnect on the inside coach panel set at disconnect. What is the correct way to keep them charged, yet not have the leakage and damage?
Thanks Bill C
Posted 04 May 2011 - 11:34 AM
Welcome to the FMCA Forum. A frequently asked, and important question.
Whether to keep the battery charging device plugged in 24/7 really depends on two things: IF you have a "smart" charger, converter or inverter/charger AND, repeat AND it is properly programmed, you can safely leave it plugged in 24/7. No, not all smart converters are programmable, but most smart chargers and inverter/charger ARE. Programming involves alerting your charger to several things, as it is smart enough to fine-tune the charging characteristics: Battery size (in amp-hrs), Battery technology (wet cell, AGM, gel). Ambient temperature. Even the smartest charger can ruin a battery bank if programmed with the wrong information. And clearly, since ambient temperature changes between summer and winter, you need to input the change at least twice a year!
Dianne and Brett Wolfe
1997 Safari Sahara 3540
Moderator, FMCA.com Forums
Chairman, FMCA Technical Advisory Committee
Member, FMCA Long-Range and Development Committee 2007-2009
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Posted 08 May 2011 - 08:15 AM
Even with the temperature probe you still have to set the charger for the battery amp hours, type (AGM, Flooded or Gel) etc.
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