Quote:
Originally Posted by CasaLoca
... Can someone please show me the good side of using the 6V batteries
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This has historically been simply supply and demand. The 6V GC battery format is/was the most readily available highest cell capacity at the lowest cost for many years.
Two good 6V deep cycle batteries with about 225AH@20hr rate can be purchased for around $160-300 while the same 12V single battery equivalent has been at a 30%+ price premium and difficult to find.
A today example of a 12V near apples to apples comparison with 2x6V series batteries is the Trojan J185H and 2xT105 (plus jumper cable). With internet availability and end prices nearly equal, the single 12V J185H is technically the better choice though in real life it wouldn't likely matter enough to measure. Will the form factor fit and can you handle a single 130lb J185H battery?
Current summary is that it is getting harder to justify using 6V GC batteries for 12V service.