Interestingly, this company has been founded by Musk's cousins. Elon Musk’s Tesla Motors just announced its offer to acquire SolarCity, one of the largest solar energy companies in the US. Interestingly, this company has been founded by Musk’s cousins. According to the Tesla Blog, the SolarCity team has built its company into the clear solar industry leader in the residential, commercial and industrial markets, with significant scale and growing customer penetration. They have made it easy for customers to switch to clean energy while still providing the best customer experience. We’ve seen this all firsthand through our partnership with SolarCity on a variety of use cases, including those where SolarCity uses Tesla battery packs as part of its solar projects. Tesla explained that this could be "the world’s only vertically integrated energy company offering end-to-end clean energy products to our customers." With Model S, Model X, or Model 3, your solar panel system, and your Powerwall all in place, users would be able to deploy and consume energy in the most efficient and sustainable way possible, lowering costs and minimizing dependence on fossil fuels and the grid.