On Fri, Dec 3, 2010 at 22:28, Owen DeLong <o...@delong.com> wrote: > ... This is easily done with AC and would be quite complex > and inefficient (especially with the technology available at the time this > decision was made) with DC.
Correct. Now, of course, with switched mode conversion and power FET technology DC-to-DC converter efficiency can be greater than 95% in optimized designs, but back when Edison and Tesla were arguing the merits, DC conversion was very inefficient compared to AC.