Tesla Inc. has kicked off production of its long-awaited electricity-producing shingles that Elon Musk says will transform the rooftop solar industry. Manufacturing of the photovoltaic glass tiles began last month at a factory in Buffalo built with backing from New York State, the company said in an email Tuesday. It comes more than a year after Tesla unveiled the shingles to a mix of fanfare and skepticism...

Tesla Inc. has kicked off production of its long-awaited electricity-producing shingles that Elon Musk says will transform the rooftop solar industry. Manufacturing of the photovoltaic glass tiles began last month at a factory in Buffalo built with backing from New York State, the company said in an email Tuesday. It comes more than a year after Tesla unveiled the shingles to a mix of fanfare and skepticism...