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Old 01-21-2021, 04:33 PM   #1
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2015 Thor Challenger House Batteries

We have the 2015 Challenger and two black generic no label house batteries connected together. Are they 6 volt or 12 volt?
What is the best replacement?
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Old 01-21-2021, 04:56 PM   #2
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First you need to determine the voltage rating of the batteries. How many cells does each battery have? If it has 3 caps that would be a 6 Volt battery if it has either 6 individual caps or two long caps, then that would be a 12 volt battery. I think you have two 12 volt batteries. One of my friends had a Challenger and he installed two new 12 volt batteries. He did consider a pair of 6 volt batteries in series but there was not enough room where the batteries are housed under the steps.
Steve & Margo
Bonaire, Georgia
2018 Fleetwood Discovery 40D LXE "Alice"
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Old 01-22-2021, 01:21 AM   #3
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I also suspect you might have two 12-volt and from what I hear, the OEM batteries in the Thor products around that time were pretty bad (Harris batteries?).

You might take a look at THIS POST as this person is posting about a 2015 Challenger and was able to fit 4 -AGM 6-volt batteries in the tray with reportedly no problem. AGM = maintenance free. He even gives what brand he purchased and the specifications plus installation tips and a photo.
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Old 01-22-2021, 05:39 AM   #4
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Thanks for the info. That picture of a Challenger with the 4 battery set up in the compartment is where our two original 6 volt batteries are, first outside bay under the drivers seat.
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Old 01-22-2021, 07:49 AM   #5
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Originally Posted by Pops R View Post
What is the best replacement?
"Best" - what? Price? Capacity? Charge/discharge throughput? Color? No one type of battery is "best" in all categories, so you'll have to decide what's best for what you want to do.

Mark B.
Albuquerque, NM
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Old 01-22-2021, 08:11 AM   #6
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Our 2014.5 Challenger has two 6 volt batteries. We replace with Interstate 6 volts.
Shell Bleiweiss
2014 1/2 Thor Challenger 37KT
Sedona, AZ
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batteries, house batteries, thor

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