It's because no one makes a 200A hour 12V battery which is why you put 2 6v 100A batteries in series.
Duh...I didn't read the OP's question correctly.Or, you could connect two 100 Amp-HR 12v batteries in parallel...............
I think the CCA would be lower but for accessories the 6v are great. A neighbor of mine uses 2 6v on his RV camp trailer and prefers them over 12v.
I understand that. That comment was just to point out that I would not try to use them as the "starting" battery.Yeah. CCA is not the "same" as AMP-HR rating......
It's because no one makes a 200A hour 12V battery which is why you put 2 6v 100A batteries in series.
Yep...you are correct. Not thinking today.If you put 2 x 6v batteries of the same capacity (in this case 100AHr) in series, you will end up with 12v 100AHr (not 200AHr). If you wanted 12v 200AHr from 6v 100AHr batteries, you'd need 4 of them wired in series-parallel...
Chris......
It's because no one makes a 200A hour 12V battery...
Supposedly (old wives tale?), 2- 6V batteries last longer than 2-12V batteries of similar capacities. 2x6V-200amp vs 2x12V-100 amp. Though, I'm not sure if this is available power or battery service life... Doesn't make sense to me, unless the 6V batteries are of better construction and it's service life...
2x12V, pro = 1 dead battery will still leave the 12V bank operational, con = the dead battery will eventually kill the other battery.
Also, depending on your failure state, you can have a 12v battery short out. That will kill the other 12v battery relatively quickly.