Green Energy

How do you use solar radiation when you don't receive solar radiation?

Obviously, the answer is you don't.

But I imagine they're doing something funny and like oh we use the radiation to heat molten salt, and when we don't have new solar radiation we use the heat from the salt to generate power... Effectively just a battery system attached to a solar system for a funny headline

Yeah, having just watched the video, that's exactly what they are doing. It's great to be excited, but there's no reason to lie in the title. This is not solar power at night. This is thermal batteries!

They built a couple of this near Las Vegas in Nevada, USA. The cost of construction was very high as was the cost of maintenance. They were only used while the research was ongoing as the power was never economical to produce. In fact, it would would have been the single most expensive source in the state.

Solar PV and wind on the other hand are some of the cheapest sources. With today's tech, grid connected batteries make even more sense than concentrated solar thermal and molten salt.