Tesla’s solar energy business is off to an ugly start to 2019, and there aren’t many hopeful signs that a turnaround is coming anytime soon. And it was a truly terrible first quarter for Tesla’s solar energy business, with installations plunging and the solar roof timetable pushed back again. Despite it all, Tesla CEO Elon Musk looked on the bright side in his comments to analysts Monday evening, saying that its traditional rooftop solar installations are poised for a second-half rebound and its long hoped-for solar roof is getting closer to hitting the market. Musk even said he liked what he saw when earlier this month he visited the Buffalo solar panel factory that will make Tesla’s innovative solar roof. “I was pretty impressed with the team and we are looking forward to scaling that up significantly through the balance of this year and next,” Musk said during a conference call with analysts Wednesday. But the numbers – and Musk’s own comments – don’t provide much reason to be optimistic, at least in the short run. For starters, Tesla’s solar energy business is just a shadow of what it was under SolarCity and when state o...