[RobHoman]

The advantage of 6VDC batteries is first of all cost per unit. Second is the fact that 6VDC batteries with very high Amp Hour Ratings can be purchased in pairs for less than one 12VDC battery that comes close in Amp Hours.

The 6VDC Batteries will discharge and recharge more times than 12VDC batteries will, so their life span is greater.

If you buy 6VDC batteries or 12VDC batteries make sure that you get the highest Amp Hour Rating you can on a deep cycle battery... not cranking amps. The 6VDC bats will crank your engine without any problems. If cranking is a concern you can always set it up so you have a 12V battery to kick your engine over.

I''m putting in new batteries here pretty soon and I''m going to go with 4 banks of double 6''s.