“Sun Toying with DC Power for Data Centers” – that was the headline on a 7/7/06 story in the East Bay Business Times. Here’s a link to a three-page PDF.
What is Sun Microsystems doing? “It’s running a mock data center on DC power. If successful, the approach could save billions in electricity and trim new construction costs for data centers across the country,” the story says.
This brings us back to Thomas Edison, who thought electrical power distribution could be done using direct current, with no need to convert it to AC (and no risk of fires).