On April 30 Tesla CEO Elon Musk (above) introduced a new line of battery packs that he believes could revolutionize the way we use energy. The Tesla battery has generated strong reactions, garnering $800M in reservations on the one hand, but also prompting skepticism that it's merely a pipe dream. No matter how you look at it, Tesla has already made its mark in the energy storage market, if only because everyone is talking about it. So is it a hero or a zero? Here are all the facts you need to know to help you decide for yourself.
