Apple's large-scale datacenter in Maiden, North Carolina will run entirely on renewable energy by the end of the year, the company has announced. Currently Apple is in the middle of buying equipment from Bloom Energy and SunPower Corp. to build not one but two solar arrays in the Maiden area; previously, only one was known to be in development. Once the equipment is in place, it should generate 84 million kWh of energy per year. Apple's fuel cell farm should be finished later in 2012.