Abstract: A solar energy collector panel, having an absorber plate and a frame within which the absorber plate is mounted. The absorber plate is comprised of a plurality of absorber plate sections each having interlocking structure formed along both of their lateral edges. This interlocking structure forms a tubular passage when the interlocking structure of the adjacent absorber plate sections are matingly locked together. An elongated tubing member whose external diameter is slightly larger than the internal diameter of the tubular passage is frictionally captured within each of the tubular passages. The absorber plate sections are formed of extruded metal and they have a plurality of corrugated surface portions that provide the absorber plate sections with greater surface exposure and improved absorption angles to the sun throughout the day.