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Old 10-27-2020, 08:24 PM   #1
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Brand: Thor Motor Coach
Model: Freedom Elite 30FE
State: Virginia
Posts: 29
THOR #19723
I want to add a second House battery to my Freedom Elite 30FE

All,

How do I decide what battery to purchase as a second battery for the house. My RV is 3 months old. Is there a requirement to "Match" the batteries. Note sure how to get started here. I boondocked and my heater pretty much exhausted my house battery the other night and I have some boondocking adventures coming up and its going to be colder then it was when this happened. What is your advice/recommendations?

Thanks
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Old 10-27-2020, 08:39 PM   #2
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Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 16,962
THOR #8860
What size battery do you have, and how much room is there for the addition of a second battery?
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Old 10-27-2020, 09:23 PM   #3
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Brand: Thor Motor Coach
Model: Freedom Elite 30FE
State: Virginia
Posts: 29
THOR #19723
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Originally Posted by Bob Denman View Post
What size battery do you have, and how much room is there for the addition of a second battery?
Bob,
The tray seems to be designed to hold two batteries, according to Thor its a 12volt 27D. I am not well versed on batteries I assume some 27D's may have more amp hours then others?

thoughts?
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Old 10-27-2020, 09:34 PM   #4
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Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 16,962
THOR #8860
They're all just about the same.
Two 27s would need just over 24" of space. (25" to be,safe...)
I'm going to move from my pair of FLA 27s: to AGM 31s when the time comes.
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Old 11-01-2020, 02:41 PM   #5
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Brand: Thor Motor Coach
Model: Freedom Elite 30FE
State: Arkansas
Posts: 276
THOR #12827
Iíve thought about adding a second house battery to our 30FE, but havenít got around to it yet. The wiring schematic for the 30FE (found on the owner resources page on Thorís website) shows a second battery (and an inverter) when the 30FE is configured with a ďrental packageĒ so there is room for two batteries under the steps.
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Old 11-03-2020, 10:49 PM   #6
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Brand: Thor Motor Coach
Model: 2019 Freedom Elite 30FE
State: New York
Posts: 139
THOR #16600
There is room for two batteries in that tray. We added a second deep cycle. AGM and Lipo is just not necessary for how much we boondock, especially with a generator. We added the second battery just because they are cheap and there was room. I am not sure we have actually needed the extra aH.
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Old 11-09-2020, 09:34 PM   #7
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Brand: Thor Motor Coach
State: Indiana
Posts: 3
THOR #21091
From what I've heard you'll want to match the group size, the amp hours and the chemistry of the battery.
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Old 11-09-2020, 09:56 PM   #8
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Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,205
THOR #15553
Quote:
Originally Posted by RVHopeful View Post
Bob,
The tray seems to be designed to hold two batteries, according to Thor its a 12volt 27D. I am not well versed on batteries I assume some 27D's may have more amp hours then others?

thoughts?
24/27/31 has to do with the physical size of the battery. Amp Hour is a different thing. You would be better off if you are gonna boondock a lot to go with 2 6-volt golf cart batteries in series. gc2 $90.00 sams club.

20 amp hour rate:215
5 amp hour rate:157
6 amp hour rate:156
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Old 11-09-2020, 11:11 PM   #9
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 2,254
THOR #6411
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Originally Posted by cavie View Post
24/27/31 has to do with the physical size of the battery. Amp Hour is a different thing. You would be better off if you are gonna boondock a lot to go with 2 6-volt golf cart batteries in series. gc2 $90.00 sams club.

20 amp hour rate:215
5 amp hour rate:157
6 amp hour rate:156
It is the lead weight that matters lead acid battery. I.E. Walmart's group 29DC RV/marine deep cycle is $89.97 20 hr rate 122 amp-H @ 12 volts and 58.7 lbs. Plus it is VRLA so no water needed. Just saying there are several ways to to meet your electrical needs.
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