I am picking up my 28dsbh on Saturday. It is solar ready (so it says). Zamp has a 160w portable, folding panel with the connections set for the TT. I had the dealer install another 12v interstate battery. This is my starting point. I haven't bought the panel yet, so I am only 170.00 in for the battery, box, and wiring. The panel (with controller, hard case, connections, and 30ft of extra cable is 690.00). Is this a good starting point, or should I scrap it and start some other way. I also noticed everyone is using 6v batteries. Are they better than 12v?