Mad Billionaire Elon Musk and, his electric car company, Tesla are now expanding a bit further than automobiles, with Tesla Energy. Determined to help end our energy problems in America, Musk has set out to create a more efficient means of storing solar energy. What Tesla Energy has done, is create an in-home battery pack, called the Tesla Powerwall, which can store energy in a far more efficient and economic manner than the conventional battery, which Musk doesn’t seem to care for much. “The issue with existing batteries is that they suck,” says Musk.