Use 24v Batteries to run 12v System... Possible?

furyous68 wrote:
That makes sense. I didn't think it was a voltage thing, but didn't realize that the 6v batteries were built stronger. Thanks!

I also notice that 6v batteries typically have significantly more AH than 12v.

Yes, and it's difficult to find a quality true deep cycle 12 v jar. Most of what you see in RVs is the "marine/rv" deep cycle which is rated in cold cranking amps rather than amp hours. These 12v batteries run around 105 aH each so 2 would get you 210. 2-6 volt GC2s run 225 aH.