I don't think a radio telescope uses much power at all. And beamed power should work fine on the night side of the moon, beaming power via laser from collector

I don't think a radio telescope uses much power at all. And beamed power should work fine on the night side of the moon, beaming power via laser from collectors in space. The apertures on either end would just be a few meters. I have to question the moon as a location for such telescopes vs. positioning them in space. We've built (small) space radio telescopes already, but none have been placed on the moon.