"Solar" at Night

 Solar doesn't work at night is a huge criticism. But it appears something similar does.

Thermoradiation cells generate power as heat flows out of them, radiating back into the night sky. It's tiny, tiny, tiny, but the potential use case is this:

You put them with your solar panels. Solar panels heat up during the day, generating power. When the sun goes down, that heat leaks back out...and you could capture that power. It's kind of like the energy harnessed from the brakes on a race car. Essentially it would increase the efficiency of solar panels. Kinda neat!