Thomas Edison, best known for inventing the light bulb, pushed for DC current for transmitting electricity, but we went with AC since it could transmit better across distance. AC has been used heavily for over 100 years, but now green requirements and data center demand are forcing people to look at DC again.

Edison told associates Henry Ford and Harvey Firestone, “I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that.”  Read the full Insight: How renewable energy may be Edison’s revenge story at Reuters.