http://livegreenlivesmart.org/blogs/green_news/archive/2008/11/20/battery-being-tested-to-store-wind-generated-energy.aspxHarnessing wind power is relatively easy (see: windmill ). It’s storing that energy that’s the hard part. Enter Xcel Energy’s “Wind-to-Battery” project . Brought online last month, the experiment in southwest Minnesota is the first in the country to useenCommunityServer 2007 SP1 (Build: 20510.895)