- The world's largest floating solar farm has begun producing energy atop a former coal mine — The 40-megawatt power plant consists of 120,000 solar panels covering an area of more than 160 American football fields. The $45-million investment could help power 15,000 homes. https://qz.com/1056019/satisfyingly-the-worlds-largest-floating-solar-farm-is-producing-energy-atop-a-former-coal-mine/?utm_source=sailthru&utm_medium=email&utm_campaign=newsletter%20weekly%20roundup:%20utility%20dive%2008-19-2017&utm_term=utility%20dive%20weekender 749 comments worldnews