Google is buying another 600 megawatts of solar power to supply electricity to its data centers.The new deal covers solar and storage projects being developed in South Carolina by EnergyRe. The company says it has 16 gigawatts under development; most projects listed on its site have deployed around 60 MW to 75 MW of solar, though some are larger. Google has been investing heavily in renewables recently. Last year, it pledged to invest $20 billion with Intersect Power and TPG Rise Climate to build enough ze ...