Tell that to the Nature journal and the thousands of scientists who’ve read a paper on this specific system design since its submission and then its publishing in October 2024.

If you want it to run at night you either need batteries, the power grid or a little garden gnome furiously cycling to power a generator.

Simple: It doesn’t run at night, as mentioned in the article. Also mentioned is this is actually more efficient than having a battery to also run at night.