I skimmed this http://large.stanford.edu/courses/2010/ph240/harting1/ http://large.stanford.edu/courses/2010/ph240/harting1/ Appearances is that losses in tra

I skimmed this http://large.stanford.edu/courses/2010/ph240/harting1/ http://large.stanford.edu/courses/2010/ph240/harting1/ Appearances is that losses in transmission lines are a few percent per 1000km. Across the US is about 4000km so you'd lose a little under 20%.