Tesla's Powerwall: A Step Toward A Clean Energy Economy But Not A Game Changer

From a climate change standpoint, the announcement on Thursday that Tesla CEO Elon Musk aims to expand his visionary company into the energy sector is an exciting but iterative step toward a cleaner electrical grid. Tesla's battery technology, called the Powerwall, won't usher in the much vaunted "Smart Grid" or get U.S. residential consumers or businesses completely off the grid, either.