Power generation from ambient humidity using protein nanowires

They link to a different press release which ultimately links to the Nature release they're ostensibly touting. https://www.nature.com/articles/s41586-020-2010-9

This appears to build off of earlier research: https://www.nature.com/articles/s41586-020-2010-9 "Here we show that thin-film devices made from nanometre-scale protein wires harvested from the microbe Geobacter sulfurreducens can generate continuous electric power in the ambient environment. The devices produce a sustained voltage of around 0.5 volts across a 7-micrometre-thick film, with a current density of around 17 microamperes per square centimetre. We find the driving force behind this energy generation to be a self-maintained moisture gradient that forms within the film when the film is exposed to the humidity that is naturally present in air. Connecting several devices linearly scales up the voltage and current to power electronics."

https://www.nature.com/articles/s41586-020-2010-9: ”The devices produce a sustained voltage of around 0.5 volts across a 7-micrometre-thick film, with a current density of around 17 microamperes per square centimetre” If I’m doing the math right 17 microamperes per square centimeter at 0.5V is, rounding up, 10 microWatt per square centimeter, or 0.1 W per square meter. Not (¿yet?) something to power a house from.