[Always Right]

Cool. But how big is the lens? Doesn't matter if the photovoltaic is 1 cm^2 if the lens is 1 m^2.

Yeah, I am puzzled by this also.

[r9etb]

Cool. But how big is the lens? Doesn't matter if the photovoltaic is 1 cm^2 if the lens is 1 m^2. Yeah, I am puzzled by this also.

You're still collecting about the same amount of sunlight, either way.

The advantage of using a concentrator is that lenses are a lot cheaper to build, maintain, and replace than the photovoltaics. You can save a lot of money by reducing the number of expensive components you have to buy.