12v to 6v review?
Currently have 2-12v 7ear old batteries that appear to be getting weak. Am thinking of replacing with 2-6v GC batteries (or maybe 4). Anyone have experience or real world review of moving to t...
Forum Discussion
pianotuna wrote:Vintage465 wrote:
I think if you went for a comparison chart that showed pounds of battery per amp/hour you'd find that 6v golf cart batteries have the advantage. If I added up 4 100ah 12v batteries vs 4 235ah 6v batteries you'll be ahead with the 6's and also use less space and right at the same weight.
And if you have 4 125 amp-hour 12 volt batteries the end result would be more amp-hours than the 6 volt format. Or if there is room for an odd number of batteries, 12 volt may have the edge.
The best battery bank would consist of 2 volt cells--say 1000 amp-hours each connected in series to yield 12 volts. on my beer budget, I can't afford them.
four 125A twelve volt batteries =470AH.
Four 250 AH 6V GC2's = 500AH
now lets talk useable AH with decent cycle life
four GC2's 470AH x 0.75= 350 AH
four 12Vs 500AH x 0.4 = 250 AH
GC2 has a 100AH (40% or so advantage)
from the trojan website four GC2's will give approx 500 cycles discharged to 25% SOC (75% DOD) before dropping below 80% of initial capacity. over 1000 cycles at 50% DOD. More than most of us will ever see.
how many cycles will the 12V give at 50%? IIRC Trojan true deep discharge 12V are rated for about 500 cycles at 50%. It drops rapidly for DOD > 50% unlike the GC2
how many at 75% DOD ??? who want to try??
