Why in the world does this chart have PV being priced by mmbtu rather that levelized cost of electricity? MMbtu might be appropriate for water heating, but not for electricity.The proper comparison would be between the cost of electricity from PV and the energy only component (excluding capacity) of cost of electricity from the various fossil sources. By this measure PV is still twice as expensive as gas fired combined cycle (per US EIA via Wikipedia) and has no dispatchability.I live off-grid on PV and love it, but charts like the one above are misleading at best.
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What is the difference, if all energy sources presented at the chart, use same measurement units? And that falling curve in the 2003/13 would not change it's direction, nor it's angle towards the axis. home page Even if we turn to cost of electricity as a method of comparison, I doubt it we would see much of a change.