The headline and a page with lots of graphics and associated worksheets come from this PV Magazine article. The underpinning assessment is from GTM Research and their report Trends in Solar Technology and System Prices.
Recall that Natural Gas Combined Cycle, the most efficient natural gas generation process, produces electricity at US$05.5/kWh. The quoted US$0.015/kWh is significantly lower than previous projections. Of course, you’ll get different numbers from the usual suspects. Just to note, nearly every established quasi-governmental organization, e.g., U.S. EIA, the IEA, ISO-NE, etc, have missed the mark on both projecting cost per kWh and penetration of solar PV, both behind-the-meter residential and utility scale.