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Old 12-02-2020, 10:34 PM   #1
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Brand: Thor Motor Coach
Model: Challenger 37KT
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House Batteries

Iíve been thinking of replacing the two 6 volt house batteries with two deep cycle 12 volt batteries hooked up in parallel. Lithium batteries are much too expensive, so Iíve been considering AGM 100amh batteries. Has anyone changed from a six volt system to a twelve volt system? Any recommendations? Thanks, Eric

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Old 12-02-2020, 10:50 PM   #2
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Originally Posted by ekfelton View Post
I’ve been thinking of replacing the two 6 volt house batteries with two deep cycle 12 volt batteries hooked up in parallel. Lithium batteries are much too expensive, so I’ve been considering AGM 100amh batteries. Has anyone changed from a six volt system to a twelve volt system? Any recommendations? Thanks, Eric
Maybe not as expensive as what you've been seeing?

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Old 12-02-2020, 11:42 PM   #3
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You're not changing from a 6 volt system to a 12 volt system. You have a 12 volt system. Two 6 volt batteries in series provides the same 12 VDC that two 12 volt batteries in parallel provide. The charger/converter doesn't care, the 12 volt loads don't care.
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Old 12-03-2020, 12:56 AM   #4
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Stick with 6V batteries. Very few 12V batteries are built as well as 6V golf cart batteries for deep cycle house service.

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Old 12-03-2020, 01:17 AM   #5
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Old 12-03-2020, 02:18 AM   #6
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Originally Posted by ekfelton View Post
Iíve been thinking of replacing the two 6 volt house batteries with two deep cycle 12 volt batteries hooked up in parallel. Lithium batteries are much too expensive, so Iíve been considering AGM 100amh batteries. Has anyone changed from a six volt system to a twelve volt system? Any recommendations? Thanks, Eric
Why would you want to do that? If anything add 2 more 6 volt batteries and run the 4 in series-parallel. Not sure about your Challenger but my prior 2015 37ND could easily handle 4 6 volt batteries and those 4 batteries were going strong when we traded the coach in 5 years later.
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Old 12-03-2020, 03:20 PM   #7
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12V batteries are cheaper and more readily available. If the OP doesnít ever boondock he may not be interested in maximizing battery power. I have two 12V flooded batteries and Iím perfectly happy with them. With AGM heíd be pretty much maintenance free
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Old 12-03-2020, 03:59 PM   #8
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Pete makes a very good point...
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