Abstract: A solar energized steam generator includes a flux collector or projection lens for collecting and concentrating solar energy, and a reflector funnel for enhancing and concentrating the solar energy still further. The lower end of the funnel is connected by means of a conduit to an insulated vault, made of, for example, rock, gravel, stone, sand, or the like, whereby the heated air is conducted directly to the vault so as to heat the same to extremely high temperatures. An air duct, operatively connected to the vault, is disposed in heat exchange relationship with a steam generator and is also fluidically connected to the reflector funnel through a fluid duct or conduit, a fan or blower being disposed within the duct or conduit for recirculating the air throughout the system.