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10-14-2019, 05:16 PM
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#1
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Senior Member
Brand: Thor Motor Coach
Model: 29m
State: California
Posts: 165
THOR #16201
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6 Volt batteries VRS 12 Volt batteries
We are looking at getting better grade batteries for the motorhome. Being I only have room for 2 batteries, I wanted to get the beast available since we are 99% Bondockers. Are the 6 volt Trojan T-105 or the T-125 Trojan good batteries and do you wire them up the same as the 12 volts I am replacing.
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10-14-2019, 05:25 PM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,928
THOR #13932
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I'm doing the six volt only because I already have batteries from a past project.
I'm going to suggest some YouTube videos.
This 6v vs 12v thing is too close to religion and voodoo
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10-14-2019, 05:36 PM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 604
THOR #2812
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Batteries are not the same size, may NOT fit in the RV battery box.
Wiring totally different-- Your RV system is 12 volt. 12 volt batteries are wired in parallel. 6 volt batteries have to be wired in series.. (parallel adds the amperage, Series adds the voltage)
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U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
2016 Siesta 24ST
1972 Moto Guzzi Eldorado
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10-14-2019, 05:45 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: Freedom Elite 29fe
State: Florida
Posts: 700
THOR #4656
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T-105 and T-125 are the best flooded wet cell 6v batteries out there. I have used multiple banks of them on cruising boats over the years. You have to mind the water levels and keep them maintained. The thing about this type of battery vs the "marine" deep cycle 12v is that the "marine" battery will not take the continuous deep discharges that the 6v Golf cart batteries will.
I am sure someone will chime in here with go with 12v AGM batteries or Optima"s because bla bla bla. Like said above, this type of post will produce quite a few opinions, now you have mine to start it off.
As to the wiring, The 6v's are wired in series, meaning positive to negative to join the two to produce 12v's as described above.
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Making a smooth transition to senility for over 70 years
2017 Freedom Elite 29fe
2015 Jeep Wrangler Toad
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10-14-2019, 07:36 PM
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#5
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Senior Member
Brand: Thor Motor Coach
Model: 29m
State: California
Posts: 165
THOR #16201
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Quote:
Originally Posted by Hooligan2
Batteries are not the same size, may NOT fit in the RV battery box.
Wiring totally different-- Your RV system is 12 volt. 12 volt batteries are wired in parallel. 6 volt batteries have to be wired in series.. (parallel adds the amperage, Series adds the voltage)
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The six volt batteries are longer and wider. I have to check the schematics on the size.
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10-14-2019, 07:44 PM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,928
THOR #13932
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I made this last night for the sole purpose of finding where 6v will fit.
It's a test fit device.
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10-14-2019, 08:06 PM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Freedom Elite 29fe
State: Florida
Posts: 700
THOR #4656
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Duckface, great idea. Hope you took terminal height into consideration.
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Making a smooth transition to senility for over 70 years
2017 Freedom Elite 29fe
2015 Jeep Wrangler Toad
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10-14-2019, 08:39 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,928
THOR #13932
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Quote:
Originally Posted by nosticks
Duckface, great idea. Hope you took terminal height into consideration.
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Yes, that's what the long line is under the measurements, the battery top. The space above is terminals and caps and an added quarter inch.
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10-14-2019, 09:53 PM
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#9
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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 How are you on building Type 27 Dummies?
(This Dummy could put them to good use for you...  )
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"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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10-14-2019, 10:11 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,928
THOR #13932
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Foam board.
https://www.amazon.com/POW-Board-Sur...NsaWNrPXRydWU=
It's about a dollar a sheet at staples.
I've been told one of the dollar stores carry it.
One 20x30 sheet made almost exactly one battery. I made one splice and only had a sliver left over.
Foam board will take a pretty good ass-kicking and hold its shape.
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10-16-2019, 03:09 PM
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#11
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Michigan
Posts: 542
THOR #9522
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Great idea!
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Pete and Carolynn Foss from Oxford, MI
2018 Four Winds 31W
1999 Aero Cub F-21 trailer
1977 Tioga 24 foot RV
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10-24-2019, 12:45 AM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: Thor four winds SF 35
State: Texas
Posts: 179
THOR #13025
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The only benefit of going to the 6 volt deep cycle like you are considering, is they can be discharged to a greater level. If you got the 105 amp hour batteries like you are considering, you will have to connect them in series to get 12 volts and you would only have 105 amphours of capacity. Using two 12 volt 105 amp hour batteries hooked in parallel you will get about 210 amp hour of use. Much better.
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10-24-2019, 12:15 PM
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#13
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 34J
State: Iowa
Posts: 111
THOR #15642
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Added two 6v batteries pretty recently to the existing two 12v.
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10-24-2019, 07:38 PM
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#14
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,327
THOR #6903
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Quote:
Originally Posted by Glensouth
The only benefit of going to the 6 volt deep cycle like you are considering, is they can be discharged to a greater level. If you got the 105 amp hour batteries like you are considering, you will have to connect them in series to get 12 volts and you would only have 105 amphours of capacity. Using two 12 volt 105 amp hour batteries hooked in parallel you will get about 210 amp hour of use. Much better.
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No, not correct
T105 AGM or any flooded cell will give you more amps and better service
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10-24-2019, 10:04 PM
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#15
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by ducksface
Foam board.
https://www.amazon.com/POW-Board-Sur...NsaWNrPXRydWU=
It's about a dollar a sheet at staples.
I've been told one of the dollar stores carry it.
One 20x30 sheet made almost exactly one battery. I made one splice and only had a sliver left over.
Foam board will take a pretty good ass-kicking and hold its shape. |
Thanks! 
http://www.thorforums.com/forums/att...1&d=1571954640
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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10-24-2019, 10:14 PM
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#16
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,379
THOR #7035
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Quote:
Originally Posted by Glensouth
The only benefit of going to the 6 volt deep cycle like you are considering, is they can be discharged to a greater level. If you got the 105 amp hour batteries like you are considering, you will have to connect them in series to get 12 volts and you would only have 105 amphours of capacity. Using two 12 volt 105 amp hour batteries hooked in parallel you will get about 210 amp hour of use. Much better.
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Quote:
Originally Posted by lwmcguire
No, not correct
T105 AGM or any flooded cell will give you more amps and better service
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Yep, the T105s are rated at 220 Amp-hours, not 105 Amp-hours. Basic flaw in Glen's logic.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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