I need more data on this, but I'm getting a strong waft of bullshit based on what I've seen so far.
ADDENDUM: I caught another description of this approach, and based on that description this technology seems to be just another concentrating photovoltaic system. The only major difference seems to be the cooling system. Now, I take the position that "efficiency" when it comes to
solar systems boils down to cost. Efficiency is important in systems that consume fuel because fuel is limited and therefore costly, but the same mind set doesn't apply when the solar "fuel" is practically without limit. With that in mind, here is my concern. Can this cooling system be configured to achieve a $/watt lower than alternatives?... and, in particular, can it be superior to alternative concentrating PV systems? What about performance during cloud cover? It may be that the configuration they have can get the cost down. I'm skeptical.