Well I am just confused. I can do a regular switch and add a deep cycle battery for the amp and stereo or west marine sells a "add a battery kit".
http://www.westmarine.com/buy/blue-sea-systems---add-a-battery-dual-circuit-system--8646275
So my typical day may look like a 45 minute ride to a beach, stay at beach, listen to stereo for say 4 or 5 hours then drive back to ramp.
I am not sure which way to do this. I am told a deep cycle battery will need to be charged externally as the boat will not run long enough to charge the deep cycle battery.
So my assumption is with the switch I would start it on battery 1 and switch to battery 2 at the beach?
Sorry for my ignorance and Happy Thanksgiving.