Putting solar panels on roofs doesn't make a lot of sense to me. Per kWh, rooftop domestic PV costs can be unto 10 times more expensive on a levelized cost basis (https://www.lazard.com/media/2ozoovyg/lazards-lcoeplus-april...) compared to a ground based utility/grid scale installation.

In fact, adding any complexity to a solar panels hardly makes any sense any more because of the incredible fall in panel prices (by 90% in about 12 years).

This price fall has made a lot of solar ideas defunct. For example, when panel prices were much higher, solar plants often had mechanical systems to orient panels to track the sun - but now nobody bothers - it's cheaper and simpler to just install an extra 10 or 20% more panels and have a no-moving-parts/low maintenance system.

Same with this idea - the extra complexity and maintenance cost of adding active cooling to a panel to increase efficiency by 10% - I cannot see the economics stack up.

For the same reason, the enthusiasm for the idea of installing solar plants in north africa and exporting power over interconnectors to Europe is gone. It's cheaper to install twice as many panels in a field in cloudy northern Europe (where capacity factors are half of what they would be in the Sahara) than deal with the costs and complexity of underwater interconnectors and transmission system upgrades.