Two 6 volt vs two 12 volt run time
I was just informed that two 6 volt batteries would run the residential refrigerator many times longer than two 12 volt batteries. I wonder if this is just hype?
Forum Discussion
Bob Vaughn wrote:
I was just informed that two 6 volt batteries would run the residential refrigerator many times longer than two 12 volt batteries. I wonder if this is just hype?
MUCH speculation on on my part coming !
6V lead acid batteries are typically deep discharge golf cart batteries. 12V batteries are likely either automotive starting batteries or "dual purpose" marine batteries.
2 6V golf cart batteries have about 400-450 minutes of reserve capacity (RC) at a 25A discharge rate. A dual purpose 12V maine battery only has about 190 minutes of reserve capacity at the same discharge rate. The big difference is that true deep cycle batteries can safely be repeatedly taken down to 50% state of charge while a dual purpose battery can only (safely) be taken down to 80% state of charge. Eve if yo have 2 marine batteries, your RC is only 380.
It is also likely that 2 golf cart batteries will cost less than 2 marine batteries.
wa8yxm wrote:
What battery gives me the longest run time per DOLLAR COST. .. That is the GC-2 Golf Car DEEP CYCLE in pairs.
Same conclusion I had.
