tranmission loss/distance

Hi all.some time ago I read on the cfu site that up to 60% of energy is lost over transmission from source to house.Now I;m reading (on wikip) its only 7% . Can somebody clear this up .Discussions are afoot of Greese doing large solar and selling it on to Germany..They seem to think this may be a cash cow.Ive been under the impression for some time voltage loss was too great to consider this..Confused.Thankyou in advance.mj