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08-28-2020, 06:15 PM
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#21
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,931
THOR #13932
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Quote:
Originally Posted by Beau388
It is the amount of lead in a lead acid battery that gives it rating nothing else. It doesn't matter if it is a 2 volt cell, two 2 volt cells, three 2 volt cells, four 2 volt cells, etc. The chemistry is the same. Now are better design batteries for specific uses, yes. A starting battery is meant for starting a vehicle. A deep cycle battery is meant for golf cart use (or an electric vehicle). A combination battery will work in both applications, but not as well as a battery made fro that specific purpose. 6 and 8 volt deep cycle batteries are the cheapest because the make up 40% of the deep cycle market as they are supplies to golf carts. Textron (E Z GO) buys over 2 hundred thousand GC-8 and 1 hundred thousand CG-2 batteries a year. Thor MC plant 750 (Thor's largest vehicle plant) buys approximately 4.500 group 27 12 volt combination batteries a year.
Go to the Trojan battery site and compare the weight of 12 volt batteries and 6 volt batteries. IE 12 volt group 27 Trojan is listed at 115 a-h at 61 lbs. A GC-2 (T-105) is rated at 225 a-h at 62 lbs. So 2 GC-2 weigh 124 lbs (1.81 a-h per lb)and 2 group 27 weigh 122 lbs (1.88 a-h per lb.) So actually the group 27 batteries have slightly more a-h per pound of battery.
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Let me counter all of that with the one simple truth that supports all 6v arguments:
'my dad said his 1954 Hupmobile....'
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08-28-2020, 06:29 PM
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#22
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,328
THOR #6903
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Quote:
Originally Posted by lp1957
Thanks EDENSOB. That's exactly where I'm at. Everything is working except charging. Does not seem to be charging from any source (shore power, engine alternator or external battery charger) Thought maybe there might be a breaker needing reset. Thanks to all
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Might have fried your trombetta or whatever brand you have solenoid, check it out
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08-28-2020, 06:32 PM
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#23
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,328
THOR #6903
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For anyone wanting to quickly check the specs, here you go
Also if you truly want to go 12v you need to get into a battery like Lifeline and spend some serious money to gain anything over the 6v series connections
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09-03-2020, 03:09 AM
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#24
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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 resettable fuse on your converter may be tripped.
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09-03-2020, 11:01 AM
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#25
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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 lp1957
Problem is solved. All that was needed was an overnight charge AND reset inverter display. Thanks to all for your suggestions and advice.
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Glad to see that you're back up and running!
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09-03-2020, 04:21 PM
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#26
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,328
THOR #6903
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Here are the data sheets I used to make my decision yv versus 12v
As you can see I gained amp hours which I needed for boondocking
Quote:
Originally Posted by Beau388
It is the amount of lead in a lead acid battery that gives it rating nothing else. It doesn't matter if it is a 2 volt cell, two 2 volt cells, three 2 volt cells, four 2 volt cells, etc. The chemistry is the same. Now are better design batteries for specific uses, yes. A starting battery is meant for starting a vehicle. A deep cycle battery is meant for golf cart use (or an electric vehicle). A combination battery will work in both applications, but not as well as a battery made fro that specific purpose. 6 and 8 volt deep cycle batteries are the cheapest because the make up 40% of the deep cycle market as they are supplies to golf carts. Textron (E Z GO) buys over 2 hundred thousand GC-8 and 1 hundred thousand CG-2 batteries a year. Thor MC plant 750 (Thor's largest vehicle plant) buys approximately 4.500 group 27 12 volt combination batteries a year.
Go to the Trojan battery site and compare the weight of 12 volt batteries and 6 volt batteries. IE 12 volt group 27 Trojan is listed at 115 a-h at 61 lbs. A GC-2 (T-105) is rated at 225 a-h at 62 lbs. So 2 GC-2 weigh 124 lbs (1.81 a-h per lb)and 2 group 27 weigh 122 lbs (1.88 a-h per lb.) So actually the group 27 batteries have slightly more a-h per pound of battery but the CG-2s are slightly cheaper on the Internet.
I do agree that AGM batteries are generally better than flooded especially for starting batteries, but unless you consider the life cycle cost, flooded batteries are a better value. Actually I find combination batteries fill all my needs for house batteries (group 29).
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T105-AGM_Reliant_DS_Final.pdf27AGM_Trojan_Data_Sheets.pdf
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09-03-2020, 06:23 PM
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#27
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,183
THOR #6411
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Quote:
Originally Posted by lwmcguire
Here are the data sheets I used to make my decision yv versus 12v
As you can see I gained amp hours which I needed for boondocking
Attachment 25919Attachment 25920
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You are comparing different Trojan battery lines. There is the one for the signature line. That I used for comparison. <https://www.trojanbattery.com/products/deep-cycle-flooded/signature-line-flooded-2/> The amp-hours for 2 6 volts vs 2 12 volts look the same to me. Trojan batteries are as good as the come in flooded, AGM and gel, but they are not cost effective unless you plan to keep the coach for 5 years or more, IMHO.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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09-03-2020, 06:59 PM
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#28
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Senior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 2,328
THOR #6903
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Well I think we agree
The reason i decided to change my 4 house batteries before they actually failed was the corrosion
We pull them down hard over night and recharge with the generator at around 110 amps
Using the flooded hard resulted in significant corrosion in the battery bay and cables
That combined with no water or cables to clean was the deciding factor
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