(Edit this message through the "fast facts" section)
http://www.google.ca/url?sa=t&rct=j&q=raj%20dasgupta%20grid%20storage%20a%20case%20study%20presentation&source=web&cd=1&ved=0CFYQFjAA&url=http%3A%2F%2Fwww.electricitystorage.org%2Fsite%2Fdownload.php%2F2012_presentations%2Fe25_dasguptav1.pdf&ei=t8nAT_TCEcqqgwfvnZj0CQ&usg=AFQjCNHoMiO8jTT1uLk0pX8t3awrthgSUQ