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Old 06-02-2013, 10:23 PM   #1
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Battery not charging

Hello Everyone,
My MH is connected to shore power. For some reason the coach battery is not charging. The light on Inverter/converter is blinking very fast. It only shows 6.5 volts on reading. What should I be looking at to make sure the battery starts charging. Also there are two golf cart batteries for the coach. Should I be adding distilled water or some thing else. This is my first time. Any help and suggestion much appreciated. Thanks
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Old 06-02-2013, 11:34 PM   #2
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Lots of things to check for. First, check all of your battery connections and make sure they are tight and corrosion free. Correct that if not and see if that changes things. It sounds like you may have never checked the battery levels (or had a dealer check them) so pop off the tops and make sure the fluid is covering the tops of the battery plates.if not, top off with distilled water and check again after a few minutes. You don't mention inverter type but 8v would cause any of them to do weird things and sounds like to have a connection but low voltage.

This is just the beginning so check back in, hopefully its simple
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Old 06-02-2013, 11:45 PM   #3
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Mine was not charging either, but only while underway After I replaced the alternator ($424 and I did the all work) everything is fine.
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Old 06-02-2013, 11:49 PM   #4
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If they are low on water add distilled water but I would try and check with a hydrometer first to see if you have any dead cells, let them set for 1/2 hr before checking. I think your batteries are toast
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Old 06-03-2013, 07:11 AM   #5
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Thanks you folks I will check all the things you folks have mentioned and report back. Thanks
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Old 06-03-2013, 10:34 PM   #6
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Hi,
Added distilled water to the battery. Cleaned and sprayed anti corrosion spray on the terminals. Connected back to the coach. The shore power is still connected. Hope it charges by the morning. Will keep you posted. Thanks
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Old 06-04-2013, 05:01 PM   #7
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The Batteries are dead. Have to get new ones.
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Old 06-04-2013, 06:06 PM   #8
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Good luck. Buy good quality deep cycles for the house system and powerful 12v starting batteries for the chassis.
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Old 06-04-2013, 06:30 PM   #9
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I will buy that your batteries a well and truly dead, but the question is why? You should be reading 13.2 or more volts at the battery with the converter on and charging. Home work Deep Cycle Battery FAQ If you do not already have a VOM/Multimeter and know how to use it. AND buy a battery monitor Trimetric or Victron.
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Old 06-04-2013, 08:51 PM   #10
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I bought MH last year. Never checked the batteries. When I did not get any 12v in the coach. I took it out batteries yesterday opened to see any fluid. The was no fluid what so ever. Added distilled water. Should I have charged the batteries before installing. I just put it back connected to the coach with shore power. Can you guys tell me if I did it correctly. Thanks
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Old 06-04-2013, 09:08 PM   #11
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The batteries should have been fully charged before putting them back into the coach. The should have also been LOAD tested to make sure that they could handle a load put on them.

Replace all of the batteries with known good ones and keep track of the level of distilled water and charge level of the batteries.

Do NOT discharge them lower than 50 % SOC. That's about 12.0 - 12.2 VDC.

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Old 06-04-2013, 09:49 PM   #12
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Some inverters have the ability to turn on/off the battery charger, does yours? Most people use distilled water in their batteries because it is readily available. The experts recommend de-ionized water to re-fill expensive batteries. That is what fork-truck owners use in their $4,000 batteries.
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Old 06-04-2013, 10:08 PM   #13
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Just as a suggestion you can plug in to shore power or run generator and take volt ohm meter and check your converter. Converter should read about 13.4 to 13.8. If lower, the converter is bad. When I had no 12 volt lights in motorhome I discovered the converter was only putting out 10.3 volts which is not enough to charge the coach batteries. You may still need new batteries based on what you have found but I would check the converter after you replace the batteries. Just my $.02
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Old 06-05-2013, 08:48 AM   #14
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Bama Fan thanks for the info. I will follow what you suggested. I have never done any thing before. I am rookie here and lot to learn. Thank you everyone, you guys have been very very helpful. Thanks a million
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