That should work just fine. I would run a mile from an outlet before I used batteries. And Unk is right, no need to bury a line unless you just don't want the hot wire close to the house. Just run a single strand to tie into the fence. If you are really worried about having a hot wire that close, like if you have little ones running around or something, you can buy insulated hot wire to make the run to the fence. It is cheaper than trenching but would be more than a regular smooth wire. BTW, I highly recommend aluminum wires, cost a bit more than the other, but it more than makes up for it in ease of use. I am considering doing any additional in the electrotwines that are out there, looks even more simple than the aluminum. If you haven't already, check out Premier fence on the internet. They are great folks and will give you expert answers to any questions, even if you don't use their stuff.