An intriguing analysis of supply and demand.<p>In short, the increase in solar generating capacity has caused peak electricity demand to occur in the evening as solar generation tapers off, as opposed to mid-afternoon in years when solar's share was lower.<p>Therefore, the rates of small-scale, residential generators 'selling back' solar power to the grid have gone down, upsetting residents who invested significantly in solar generation, and assuming their ROI would be based on unchanged supply-and-demand characteristics.