SolarCity: A subsidiary of Tesla, the company acquired by Elon Musk and then turned into a revolutionary mass producer of electric vehicles. SolarCity has led the industry in a plan called solar leasing, in which customers pay for the energy used over a period of 20 years, rather than deal with the costs up front.
Azure Power: A true pioneer in establishing commercial solar power in India, Azure Power has greatly contributed in making India the world's cheapest producer of solar power. The company focuses on producing solar energy at a low cost, making it a viable alternative for the masses.
These two companies are just one example of the many solar energy plays out there currently. Which ones do you see as the next big thing?