the minnkota website has a pretty good wizard to help you with your selection. you need to know your boats weight and the distance from the bow to the water line. Click the
Build My Edge link
thrust is going to depend on a couple of factors
1 - is the TM your primary engine
2 - how big are the lakes you plan to fish
3 - length of time you will be fishing
going to imagine a 12' boat doesn't have a ton of room to put 2 batteries for a 24 volt system so you are talking a 12v system.
get a deep cycle marine battery with the highest reserve capacity you can afford...if all day fishing you are going to want one with around 200 reserve capacity.
Great resource on Trolling Motors.
https://www.trollingmotors.net/pages...ical-resources
good deals on used TM's can be found on craigslist
