Be VERY circumspect about manufacturer claims like that, among other things they are based on an unrealistic and unobtainable high illuminance (1,000 W/m2), while with the solar cells are artificially kept at 25ºC (by water cooling). The 12% value indicated in my table is a real-world value. However, if you have a particular model in mind and if you'd like, just send me the part number and I'll review it for you and let's see what the manufacturer says in the "fine print". (In engineering, we call hiding the bad news, "specsmanship"!)
I think you need to go back to the table and pay particular attention to the caution in note 11 at the bottom.
Keep in mind that ultimately it is YOU who is paying that subsidy to yourself via the utility fund established by your friendly legislature!!! (TANSTAAFL)
My prediction is that by the time you're through paying back the cost of the solar panels, installation costs, panel supports, wiring, inverter, building permits and especially the time value of the capital invested, that your solar cells will be dead from old age.
However, I don't want to rain on your parade (or your solar cells), so if you're hot to trot, go for it. Since I'll being paying part of your subsidy, I expect a cold brew from you, if we ever meet.
thanks - simply brilliant