I just bought my first fishing boat and it is a 1998 Nitro Tracker 205SF with a 200 horse and a trolling motor. I have a cranking battery on one side in the back of the boat and 2 interstate batteries on the other side. the trolling motor is hooked up to the Interstate battery and the back-up interstate battery I believe. I figured out that everything electronic was hooked up to the cranking battery including my stereo. I recently switched everything over to the Interstate batteries and a separate line for my stereo. the only thing I have hooked up to the cranking battery is the motor, which from what I read was correct. Now I bought an on board battery charger from minnkota that has 2 banks. I need to know how to and where to install the charger. It says that it shouldn't be near a gas tank, but that is where my batteries are. That got me wondering if the batteries should be by the gas tank, but a marina installed them there so I would assume that the on board battery charger installed back there would be fine as long as I get it off to the side and not over or below the batteries. Any suggestions?