I currently have two 6v 220 min @ 20 amp reserve batteries in series on my TT. Will there be any charging issues if a add a third battery in parallel to this circuit that is a 12v 90 min @ 25 amp reserve? All are deep cycle. The 6v are wet and the 12v is an AGM if that matters. I thought I read where they all need to be the same reserve capacity for some reason.
Thanks