There is no power supply from the grid at Quemao Viejo. I guess it could be brought, but I am quite sure it would cost a lot…and also I think it is very exciting to produce one’s own supply of electricity ( not to mention the advantages to the environment!).
Solar energy seems to me a great solution .
Being located in the south of Spain, I don’t think there will sun shortage, apart from the scarce cloudy days. In summertime, I am pretty sure there will be at least ten hours of direct sun light to hit solar panels. But because of cloudy days around winter, and the fact that Quemao Viejo is behind a high mountain, I will consider only an average of five hours of direct solar light when making calculation for any solar array used.
I cannot be that wrong as per the “solar farms” that have being deployed in the area in recent years: