Parabolic Steam Generators versus PV

I have been researching the processing of regolith for pv grade silicon. There are going to be some challenges. I think extracting aluminium from the regolith where Apollo 16 landed and make trough reflectors horizontal or vertical to generate steam for power plants may be an economical option. I am thinking terms of lunar surface installations. It may be possible to beam to earth from the moon's surface. An equatorial grid that could supply continuosly would foot the bill pretty well and the subject of solar wind and atmospheric drag would be a mute point.
Regards
Don