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Old 05-29-2013, 02:25 PM   #1
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Chassis batteries boiling when running generator

Has anyone had problems with the chassis batteries boiling over when running the generator on the coach? 1 of many problems on the new Showhauler. Any help would be appreciated!!
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Old 05-29-2013, 11:14 PM   #2
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Need to get to the batteries with a volt meter, anything over 14 v , they will boil. Check the reading you get against the specs and report to the manufacturer.
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Old 05-29-2013, 11:19 PM   #3
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Showhauler told me to disconnect the battery isolation solenoid and tape the wires up. Thats their fix. I wonder if this happens on all their coaches??
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Old 05-30-2013, 02:06 AM   #4
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Quote:
Originally Posted by JPerham301 View Post
Showhauler told me to disconnect the battery isolation solenoid and tape the wires up. Thats their fix. I wonder if this happens on all their coaches??
Verrrry interesting . Did they say they'd get back to you ?
Or is this their only repair.
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Old 05-30-2013, 02:48 AM   #5
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I would contact Showhauler again and talk to someone else. You do have a issue which they should have a interest.
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Old 05-30-2013, 06:35 AM   #6
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Just curious. This must happen when on shore power also. What voltage is your converter/charger putting out to the coach batteries. If you disconnect the isolator relay you will not be charging the coach batteries when the engine is running and you will lose your emergency start connection.
Maybe there is some new technology I am not aware of.
Did they say "disconnect the relay and get it in here" ? That would be a good answer.
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Old 05-30-2013, 08:22 AM   #7
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Thats the odd thing, we have had no issues on shore power. I'm currently hooked up now and have been monitoring the voltage, no problems. Anly when we are driving and running the generator at the same time are the batteries getting over charged. As for Showhauler, they made no comments about actually fixing the problem. We have several issues including 3 out of 4 jacks dont work. The roof bonding tape accross the front has peeled up twice now. Auto Gen start does not work etc...
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Old 05-30-2013, 08:31 AM   #8
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It is uncommon for the Genny or Shore power to charge the chassis batteries, especially
when the coach engine is running as it will lead to an overcharge situation and possibly cause the internal regulator to fail. If your rig is equipped with an Autostart system it may by wired incorrectly.
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Old 05-30-2013, 08:36 AM   #9
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Oh..I didn't get that you were running the engine and generator at the same time. The generator uses the same charger as when on shore power. If the coach and chassis batteries are far enough apart on voltage to close the isolator relay then you are charging the batteries with the alternator and the convertor/charger. The chassis batteries are not as able to handle the higher charging voltage if the coach batteries are demanding high charging voltage because they are discharged.
If the recommended fix is to defeat the isolator relay, consider putting a switch in the power circuit so you can control it yourself.
Just my 2 cents.
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