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Old 07-07-2021, 03:57 PM   #1
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Brand: Thor Motor Coach
State: Minnesota
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THOR #6628
New question about charging house battery

Not to step on your thread, but I don't know how to post my own question: When parked and on shore power should the coach battery be in the "use" or "store" mode? We keep it in the "use" mode in case the power goes off in the campground so the fridge will continue to run....the power did go out this weekend and the fridge did not run. We discovered that the coach battery was dead. Is that because we left it in "use" position and were not driving? Does the coach battery charged while plugged into shore battery?

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Old 07-07-2021, 04:08 PM   #2
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Model: ACE 27.1
State: Florida
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THOR #7035
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Originally Posted by aws1008 View Post
Not to step on your thread, but I don't know how to post my own question: When parked and on shore power should the coach battery be in the "use" or "store" mode? We keep it in the "use" mode in case the power goes off in the campground so the fridge will continue to run....the power did go out this weekend and the fridge did not run. We discovered that the coach battery was dead. Is that because we left it in "use" position and were not driving? Does the coach battery charged while plugged into shore battery?
The house batteries are charged by the converter/charger when plugged into SP or running the generator IF the USE/STORE switch is in USE. So leave it in USE unless not using the RV for more than a few days AND NOT plugged into SP.

Depending on which MH you have the house batteries may also be charged by the engine alternator. Almost all Class A MHs do and some Class C MHs do.
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Old 07-07-2021, 08:00 PM   #3
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Brand: Thor Motor Coach
Model: Palazzo 33.2
State: Georgia
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On my Palazzo the house batteries charge regardless of whether the rig is in store or use mode.
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Old 07-07-2021, 08:03 PM   #4
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Originally Posted by rudyhehn View Post
On my Palazzo the house batteries charge regardless of whether the rig is in store or use mode.
You must have an Inverter/Charger then, instead of a Converter/Charger.
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