It’s thermoelectric rather than photovoltaic, and he claims to utilize a material that neither expands nor contracts due to heat. The electricity comes from the heat rather than the light, and the heat is greatly intensified rather like a parabolic mirror. The heat is passed through the thermoelectric “generator” repeatedly, thereby minimizing or hopefully eliminating waste energy in the form of heat. There are functional thermoelectric units available on the market now, people are attaching them to stove flues and the like. Not very common, not yet, but they’re pretty cheap all things considered and there are so many sources of waste heat to capitalize upon. If you’re unfamiliar, those camp stoves that have a USB port for charging cellphones, tablets and laptops contain a thermoelectric generator that powers a fan to make a hotter, cleaner burn as well as sending electricity to the USB port. One brand is BioLite. He’s just concentrating the heating effect of sunlight upon these generators and claims to have a material that greatly enhances the utility of the heat generated. Does it work? Heck if I know, sounds good but the proof is in the execution.
“Does it work? Heck if I know, sounds good but the proof is in the execution.”
Thermoelectric has a very low efficiency. He is claiming near 100%.