RE:InterestingYes this is very true. Few achieved near 27 percent under lab setrings and all panels lose efficiency through the day usually 2 to 5 percent so there is that factor. There are several things in the production process that can potentially increase panel efficiency such as finding the p and n junctures and doping one od the two i forget which. The doping is adding a chemical layer as to my recollectiom and then heating those points where in the past lasers were being utilized to do so. Even so with the proper controls and process it os not easy to mass manufacture panels of even 25 percent efficiency. Manufacturers not only have to test the efficiencies between the panels but all the matices within the panels themselves and there seems to be losses there that effect the overall efficiencies. It will take some time by the looks of it to break this thresshold and this is going back a decade or more when i first got into solar that thid threshold had been spught to over come. It will actually be quite the achievement once it is done.