I have a 16 foot Lowe aluminum boat with 40 hp motor. I am getting it rigged out for bass fishing. I am looking at a 55lb 12 volt trolling motor. My question is will a 12v allow me to fish a few hours a day? I dont have a lot of room for 3 batteries or I would get a 24v. I plan on having a starting battery and a trolling motor battery due to space and weight. I am just not sure if a 12v will keep me going a couple of hours.