Abstract: A power generating system comprises a solar concentrator defining an effectively concave reflective surface on a surface of the earth for concentrating incoming solar energy. A solar collector is disposed in an underground chamber provided with an access opening. The solar collector receives solar energy concentrated by the concentrator and converting the concentrated solar energy to another energy form, generally thermal energy, which is subsequently convertible to electrical power. Directional componentry is provided for directing concentrated solar energy from the concentrator along a predefined folded transmission path through the access opening to the collector.