The results were published in the recent "Energy Infrastructure Update" report from the Federal Energy Regulatory Commission's (FERC) Office of Energy Projects. The remaining 302 MW added was from natural gas. FERC reported no new capacity from biomass sources for the quarter nor any from coal, oil, or nuclear power.

During Q1 2015, eight new "units" of wind came online with a combined capacity of 647 MW — accounting for 52.64 percent of all new generating capacity. Solar provided 30 units (214 MW), geothermal steam provided one unit (45 MW), and hyrdropower provided one unit (21 MW). Five units of natural gas provided the new capacity from that sector.