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Old 11-07-2017, 09:34 AM   #1
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House Batteries.

My local RV service center said my house battery is shot. It is a 12 volt battery. He says to install 2 - 6 volt batteries because they supply more power than 1 - 12 volt. Would a Marine deep cycle be just as good? Pros and cons??

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Old 11-07-2017, 09:40 AM   #2
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Originally Posted by O-man View Post
My local RV service center said my house battery is shot. It is a 12 volt battery. He says to install 2 - 6 volt batteries because they supply more power than 1 - 12 volt. Would a Marine deep cycle be just as good? Pros and cons??
No, it is not a true deep cycle battery like the 6 volt batteries. Your RV service center is correct, 2 - 6 volt deep cycle batteries will provide more amp hours of power than any 12 volt. It's all about the battery amp hour rating under load.

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Old 11-07-2017, 09:45 AM   #3
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He is giving you correct information. The 12volt deep cycle battery will not supply near the anp hours of the two 6 volt. If you have the space to accommodate 2 batteries and are ok with the extra initial expence that would be the way to go
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Old 11-07-2017, 01:00 PM   #4
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Duh! Of course two batteries have more power than one! Comparing 2x 6v to a single 12v is pointless. Two Group 27 12v's provide about the same power as 2 6v golf car batteries, somewhere between 210 and 230 amp-hours. That's true whether the 12v are Marine/RV type or true deep 12v cycles like a Trojan 27TMX.

The GC2 6v golf car batteries are superior in reliability and longevity to any Marine/RV battery and that's a solid reason for choosing them, but amp-hours are amp-hours.
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Old 11-07-2017, 01:44 PM   #5
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Thnx lllkrob and MoCoTom. Your reply and info is appreciated.
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Old 11-07-2017, 03:40 PM   #6
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That's probably what you have now is a 12 v marine combo start battery.

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Old 11-07-2017, 03:48 PM   #7
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Check out this post and the it contains.
Best and most detailed comparison of deep cycle battys I have seen.

Useful & Complete- Deep Cycle House Batt'y Info & Comparisons

2 - 6V GCs best by far...it's more than just AH.
GCs are built for that duty and will last longer and reasonable price at Sams Club or Costco
Compare $/AH/life cycle
You cant beat GCs

Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
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batteries, house batteries

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