Wed, 16 May 2012 23:14:36 CDTViewed: 7 times. U.S. Energy Secretary Steven Chu believes in a diversified energy portfolio, and on Tuesday he was in Arizona to speak on at least one aspect of how to get it: financing. Money is the wheel that drives most energy production, and that's true for renewables. Chu was in town on Tuesday, his first visit to Arizona, to expound on the virtues of a Phoenix partnership with National Bank of Arizona, Salt River Project and Arizona Public Service Co. to provide financing for solar systems. Money is at the