<![CDATA[xcel energy inc. Resources | ZDNet]]> en-us <![CDATA[Utility-grade electricity storage batteries make wind energy possible on a breeze-less day]]> Sun, 28 Dec 2008 13:40:50 -0800 XEL XEL <![CDATA[Batteries to store wind energy]]> Sat, 27 Dec 2008 09:56:15 -0800 XEL XEL <![CDATA[Test case: what happens when a government requires renewable energy?]]> Mon, 18 Aug 2008 18:45:00 -0700 XEL XEL <![CDATA[Xcel Energy Collaborates With IBM to Build Groundbreaking New Solutions]]> IBM XEL IBM,XEL