Good article. A while back I had the pleasure of hearing Dr. Kintner-Meyer speak about EVs & the Smart Grid at our local library. Also, I also read one of his articles where he estimated that given the US grid and generators that exist today (well, at the time of the article, probably around 2010), about 75% of current vehicles could be replaced with EVs without the addition of any new generation. So to answer the question "How to Charge Millions of Electric Cars?", just plug them in every night. According to Dr. Kintner-Meyer, there is plenty of excess generation capacity at night and most of the rest of the time as well (except summer afternoon to early evening peaks, mostly in the South). He also showed that if we use V2G smart grid technology, about 5-15% of the vehicles should charge during the day while at work to help stabilize the grid (frequency regulation or something like that). Here are a couple of links to more:
http://www.greencarcongress.com/2013/03/pnnl-20130306.html
http://www.mynissanleaf.com/viewtopic.php?f=7&t=5494&p=274676&hilit=+V2G#p274676
http://www.mynissanleaf.com/viewtopic.php?f=12&t=11515&p=267565#p267505
http://www.greencarcongress.com/2013/03/pnnl-20130306.html
http://www.mynissanleaf.com/viewtopic.php?f=7&t=5494&p=274676&hilit=+V2G#p274676
http://www.mynissanleaf.com/viewtopic.php?f=12&t=11515&p=267565#p267505