Your Questions About Solar Energy Generator Wikipedia

What Energy Source would be great for a new planet and takes up as little space as possible(For the Generator)?

Also, How big would the plant/generator be?
Also, how big would the generator be?
I have chosen to go with Solar power. Correct me if I’m wrong – All you have to do is place the panels on top of buildings, and the sun does all the work. (There is only about 100 people colonizing the planet). I only know little about solar power, so info on how it works etc.. would be great
Pls Answer
Thanks 🙂

what do you consider to be the greatest challenge in mineral supply and demand for the current century?