Alternatives to solar-power on airless rocks

ToughSF will link (pdf) to Alex Ellery 2021: "Generating and storing power on the moon using in situ resources". ToughSf summarises: solar concentrators paired with vacuum tube-based thermionic converters reaching ~15% efficiency.

These are not solar panels ("photovoltaics"). Panels are for LEO, shipped up from Earth. Ellery is working from a paradigm where we don't ship panels further to the Moon; Loonies go assemble their own power-sources. Once set up on the Moon, Casey Handmer can go beam to them additional power from some high mountain on Earth.

I imagine similar should be good for near-Earth asteroids like Atíra.

BACKDATE 11/17