Those numbers are drastically different from January 2012, when more than 70 percent of new power generating capacity was provided by fossil fuels. In that month 47.7 percent of new capacity was created by coal-fired sources and 26.3 percent was provided by natural gas fired units.
Wind power was the largest source of new generation last month, adding 958 MW of power capacity. Solar power added 267 MW and biomass-fired sources added 6 MW.
Renewable sources still rank behind fossil fuels in total installed operating generating capacity, however. According to FERC, natural gas-fired sources provide 42.37 percent and coal provides 29.04 percent of total installed capacity. Wind power produces 5.17 percent of the total, while solar power provides .38 percent and biomass-fired sources produce 1.29 percent of total installed capacity.