Tesla Motors Inc. officially closed on a deal Monday morning to buy SolarCity Corp. in an all-stock deal valuing the company at $2 billion, the Los Angeles Times reports. Tesla Chief Executive Elon Musk wants to sell the company’s solar panels through Tesla’s stores so customers can buy them to power their homes and charge their Tesla electric vehicles The company’s first joint project – solar roof tiles that look like traditional tiles – are expected to be on the market by summer.