Panels that generate power from raindrops

The Energy Shift posted that scientists are developing hybrid solar panels able to generate electricity from raindrop impact as well, through the triboelectric effect, and notes in the post itself that the energy obtained from rain is today far smaller than that obtained from sunlight.

There is published work behind it. The Institute of Materials Science of Seville, a joint centre of CSIC and the University of Seville, described in Nano Energy, in a paper dated 25 December 2025, a water-resistant perovskite solar cell coupled to a droplet triboelectric harvester, with more than 100 volts measured from the impact of a single drop.

Peak voltage per impact is not energy per square metre over a year, which is the figure a project runs on. The effect depends on a coating about 100 nanometres thick, and the asset question is how long that layer holds performance under soiling, abrasion and cleaning, alongside a module sized for decades.

The result is laboratory work with authorship, a journal and a date, and that already separates it from a generic promise. The next figure that matters to an investor is accumulated energy per area in field testing, with the coating degradation curve measured.