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Old 05-19-2015, 10:57 AM   #1
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Coach Battery

Does the house battery get charged off the engine while its running?
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Old 05-19-2015, 11:03 AM   #2
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If everything is working properly it sure should.

Having problems ?
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Old 05-19-2015, 11:07 AM   #3
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Yes, it should. Not as completely as it would when plugged into shore power (if you have a good multi-stage converter/charger). But enough to keep things going pretty well.


Battery charging is a very complex subject that can be delved into, if you are depending on battery power alot.
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Old 05-19-2015, 11:11 AM   #4
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Strange thing I moved my unit on Saturday in the yard. Im fairly sure I turned the power off to the house battery. Went to move it today and there wasn't and battery power.....flat dead. I have put the charger on it. Not sure if I left something on to drain it?
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Old 05-19-2015, 11:47 AM   #5
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OK , going to have to take a step back and ask questions here.

You moved the coach on Saturday , and it wouldn't start today ?
That's a chassis battery problem.
Starting the engine may have been the last of the battery power available and at that point would have required 6>8 hours of engine run time to charge the battery back up.
Many coaches the battery disconnect is only for the , coach ( house or interior 12v systems ) some coaches have a second disconnect for the chassis ( engine start) battery.

Can you please take some time and fill out a signature line ; by clicking " Quick Links " under your welcome message, then " Edit Signature " type in all your coach info, then click , save , at the bottom of that page. Your info will automatically appear below your post, as mine does below this one, and those trying to answer your questions will know what your dealing with.
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Old 05-19-2015, 03:38 PM   #6
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Some rigs will charge faster from the engine than if they were plugged in. It depends on the size of the alternator and the size of the charger/converter. My original converter was a 70amp unit, if I remember correctly. My alternator is probably 150 or more, so faster charge time.
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Old 05-19-2015, 07:42 PM   #7
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I believe the correct answer to this question is depends on the coach. Some people on here have had to go to a bird system to charge the house batteries off of the alternator. There are a lot of posts on this subject talking about brands if you want to look them up. Other coaches like mine charge off the alternator with the built in circuitry.
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Old 05-19-2015, 08:43 PM   #8
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Quote:
Originally Posted by gemini5362 View Post
I believe the correct answer to this question is depends on the coach. Some people on here have had to go to a bird system to charge the house batteries off of the alternator. There are a lot of posts on this subject talking about brands if you want to look them up. Other coaches like mine charge off the alternator with the built in circuitry.
I agree. We had a 2005 Diesel Bounder that did but previous year of the same rig did not, as designed by the factory.
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Old 05-19-2015, 09:25 PM   #9
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I didnt say the engine wouldn't start. I said the house battery was dead.
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Old 05-19-2015, 09:30 PM   #10
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Quote:
Originally Posted by campguy1973 View Post
Strange thing I moved my unit on Saturday in the yard. Im fairly sure I turned the power off to the house battery. Went to move it today and there wasn't and battery power.....flat dead. I have put the charger on it. Not sure if I left something on to drain it?
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Old 05-19-2015, 09:39 PM   #11
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Right....I was speaking of the house battery not the engine battery. Engine started with no issues.
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Old 05-20-2015, 09:03 AM   #12
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Quote:
Originally Posted by Lobstah View Post
Some rigs will charge faster from the engine than if they were plugged in. It depends on the size of the alternator and the size of the charger/converter. My original converter was a 70amp unit, if I remember correctly. My alternator is probably 150 or more, so faster charge time.
Faster, yes in your situation, but not more completely as the automotive voltage regulator ALWAYS cuts off the voltage at the float level. The automitive charging system is designed to provide ample power to the vehicle while running and assumes a battery that is almost always full (using only the current necessary to start the vehicle).

IT wil NOT charge a deep cycle battery to a full 100%, but only to about 80%, however in a pinch, like I said, it will charge a heavily discharged coach battery to that 80% point pretty fast, and I agree with you on that.

Look like the OP have a different problem that that, namely a depletion of the chassis battery pretty quickly and then no start. Could be lots of issues, including the simple one of just leaving something on in the vehicle part of the electrical circuit.
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Old 05-24-2015, 01:01 AM   #13
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Campguy1973, I have got the same problem as you - No House Battery.
We have had our 2008 Winnebago Adventurer for a couple of years, and the other day I could not get the House Battery to come on line. I switched the Auxillary Battery Switch to "On" but the House Battery power would not come on line. This is the first time this has ever happened. I have checked the House batteries and the water level is fine. When I go to external power (either AC hook-up or the Generator), then the House Battery comes on line ok and when I check the "House Battery" voltage, it reads 14 volts! As soon as I disconnect external power, I again loose House Battery power. Could the Auxillary Battery Switch be bad, or am I doing something wrong? Any help would certainly be appreciated.
Thanks you,

Ron Petersen
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Old 05-24-2015, 08:07 AM   #14
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Yes, It should charge when the engine is running, BUT;

If your MH is equipped with a disconnect solenoid, that solenoid must be in the "connect" or "use" position. I've heard several people refer to this as a "salesman Switch"

These solenoids have a fuse mounted right on them (two fuses actually) you may want to check and make sure the fuses are OK. The solenoids remember their position they may be labeled - OFF / ON, Disconnect / Connect, or Store / Use.
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