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Old 07-24-2019, 10:16 PM   #1
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Question Newbie Thor Challenger Question

Hi All,

I am a newbie class A owner. Last week I came home with a 2020 Thor Challenger. For the past few years I have owned a Coachmen Freelander Class C.

My question is how I can keep my chassis battery from draining. With my class C, it doesn't seem like anything really drained the chassis battery when it was sitting in front of my home and plugged into house power. After the Challenger sitting in front of my home and plugged into house power for the past 24-48 hours, I walked out this evening to find that the chassis battery was dead as a doornail. The house batteries were fine, but I had to get my jumper battery to charge the chassis battery. The rig has an inverter (New to me. Didn't have one in my Freelander) and a solar panel, which I thought was supposed to keep the batteries charged, but apparently I am not clear on what the purpose of the solar panel is.

If I am plugged into house power at my home, is there something specific that I should be doing in order to keep the chassis battery charged? Or at least keep it from draining? At this point i have just unplugged from house power and turned off the main power switch.

Thanks in advance!

--Sam
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Old 07-25-2019, 08:36 PM   #2
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When plugged in, do not turn off the main power (use/store switch). If it is not turned off, you may have a problem with the relay in the power control center. Sometimes called a BIRD. There are lots of threads you can search to help you figure it out.
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Old 07-27-2019, 10:54 PM   #3
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Quote:
Originally Posted by Mnoel View Post
When plugged in, do not turn off the main power (use/store switch). If it is not turned off, you may have a problem with the relay in the power control center. Sometimes called a BIRD. There are lots of threads you can search to help you figure it out.
Turning off the main power while plugged in isn't possible. The rig won't let you.
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Old 08-08-2019, 08:32 PM   #4
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I am new as well. Just bought a new to me 2017 Challenger 37YT. Have had it plugged in to 120 volt here at the house a few days. One thing I noticed was that I had to keep the inverter turned on for the house batteries to charge from shore power. But I did not have a problem with the engine battery. I was running the generator a good bit so we had air-conditioning. Maybe that kept the engine battery charged? I know this does not address your specific issue.

FYI, I did see one feature in the owner manual. You can use the house batteries to start the engine if the engine battery is dead. There is a switch on the dash. I think I read that correctly.
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Old 08-18-2019, 12:30 PM   #5
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I added a shut off switch in the battery compartment to make sure the batteries don't lose a charge.

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Old 08-19-2019, 05:44 AM   #6
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update

Quote:
Originally Posted by bsheet2 View Post
I am new as well. Just bought a new to me 2017 Challenger 37YT. Have had it plugged in to 120 volt here at the house a few days. One thing I noticed was that I had to keep the inverter turned on for the house batteries to charge from shore power. But I did not have a problem with the engine battery. I was running the generator a good bit so we had air-conditioning. Maybe that kept the engine battery charged? I know this does not address your specific issue.

FYI, I did see one feature in the owner manual. You can use the house batteries to start the engine if the engine battery is dead. There is a switch on the dash. I think I read that correctly.
Update. The above was not correct. You do not need the inverter turned on to charge the house batteries. My bad. Sorry if this confused anyone.
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Old 08-19-2019, 05:49 AM   #7
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I am new as well. So take this with a grain of salt. The engine battery is supposed to be isolated from the house batteries. So plugging in to shore power should not charge the engine battery.
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