Shareholders from both companies still have to approve the deal. And if they do, Tesla promises the results will be awesome. Musk says that he never wanted Tesla to be just a carmaker. Buying SolarCity will turn Tesla into a company that will sell you an electric car and the power to charge it. "This would start with the car that you drive and the energy that you use to charge it, and would extend to how everything else in your home or business is powered," Tesla wrote in its company blog.