Unfortunately inaction by the government on either pollution standards or conservation efforts is leaving power companies with a lot of uncertainty about what will be required in the future. With that much money at stake, they are unwilling to take the risk. There are too many unanswered questions about CO2 emissions standards, natural gas availability and utility regulations. Since the move to deregulate utilities over the past decade has almost never actually resulted in reduced prices for consumers, new rules are being considered that also make companies reluctant to invest. The bottom line is that with renewable electricity still a tiny portion of overall capacity, we could be looking at serious issues down the road and much higher costs to charge batteries in EVs.
[Source: CNN Money]