Abstract: A tracking solar energy collector comprising a plurality of internally defined, spaced-apart channels for containing a working medium to be heated with solar energy. In a preferred form the invention comprises a rigid, generally rectangular frame, a foam insulation layer confined within the frame forming a lower side of the collector, converter means disposed within the frame over the insulation layer for absorbing heat from solar energy, fluid input manifold means disposed within the frame for inputting a working medium into the unit, fluid output manifold means in spaced-apart, substantially parallel relationship with the input manifold means, and a plurality of generally parallel, elongated channels disposed between the converter means and the foam insulative means for conducting fluid between said input manifold means and said output manifold means.