pee the Moon
Once we colonize the moon, we need lots of power to keep things humming.
Two methods seem obvious: solar cells and turbines.
While solar cells can be a significant source of electricity, turbines can provide surge power.
Solar cells have a few drawbacks that make them less than ideal for the moon: micrometeorites and dust.
The dust problem can be addressed by putting the solar cells in a rack, each angled to catch the sun and shake, shimmy, shake at intervals.
Since you already have a solar rack, just add closed-loop Ammonia Turbines at select sites.
The temperature difference between Lunar day (+125℃) and crater shadows (-170℃) will do for a gas/liquid transformation.
Glass faced, stainless steel tubes rising above crater walls can capture solar insolation to heat Ammonia to a gaseous state (temperature >= -34℃).
Where oh where oh where can we find Ammonia on the moon?
Of course, just use Humans to generate pee, a little bit of basic chemistry, and voilà, you have all the Ammonia needed, over time.