Nearly three years ago, Tesla shelled-out $2.6bn on SolarCity, then the largest solar player in the country. Some were skeptical of the rationale behind the decision, given that CEO Musk’s cousins were founders of the firm, and had begun experiencing some difficulties in the market. At the time, it made a lot of sense for Tesla to be able to offer some sort of bundled deal that included a car, home battery, and solar panels, as a single contract – but this hasn’t happened, and Tesla lost interest in SolarCity as it struggled to get the Model 3 out the door. Now that it has finally cracked that nut, Tesla might have the energy to focus on what to do…