It's not too late for 2015 top 10 list. And I've probably saved the best for last - This one, from Bloomberg New Energy Finance CEO Michael Liebreich, is the one you want to read.
The bounce-back in global clean energy investment, up 16% to $310bn after two years of decline, was probably the single most significant development of 2014. EON’s historic announcement that it is splitting into two, selling off its bulk generation and concentrating on its renewable and consumer-facing activities, is another contender. NextEra’s acquisition of Hawaiian Electric Industries was described by its chairman and CEO as “a postcard from the future of the electric industry”. Google’s $3.2bn acquisition of Nest probably said more about the direction of energy technology than any other development in 2014. And ACWA Power’s winning bid of less than 6 US cents per kWh to build 200MW of unsubsidised solar in Dubai is going to set a new benchmark for PV costs, clearly below the price achievable by natural gas.