Tesla solar roof only installed around 3,000 systems total, according to a new research report.Reuters A new report says Tesla Solar is behind on its goal to install 1,000 solar roofs per week. Tesla Solar customers have complained of delays, and one woman alleged her faulty panels caught fire. Elon Musk has previously spoken about issues facing Tesla's Solar Roof project. Tesla Energy has installed around 3,000 solar roof systems in the US since its launch in 2016, according to a new report.