Yes, Tesla is a car manufacturer. However, electric cars need batteries. That’s why Tesla’s CEO Elon Musk is also in the business of generating and storing solar electricity for entire islands as he continues on his mission to accelerate the world’s transition to sustainable energy. This week the clean energy company unveiled its first big solar-plus-storage project, a 13 megawatt solar farm that will power the Hawaiian island of Kauai around the clock from 54,978 panels and 272 Powerpacks providing 52 megawatt-hours of energy storage.