Abstract: A solar energy collection mat element of unitary black elastomeric or flexible plastic consists of a side-by-side series of parallel pipes with integral connecting material between the pipes defining tear lines. The last pipe of the series has a longitudinally directed slit, allowing the last pipe to be opened transversely and placed in gripping relationship about the first pipe of another similar mat element.

Abstract: A two-sided solar collector is housed between a pair of opposed corrugated translucent plates which define a series of side by side elongated cavities. In alternate ones of the cavities are located integral elongated elastomeric solar energy absorbing elements including a series of side by side tubular conduits for heat transfer fluid and stretchable left and right margins terminated with beads that sealably engage the interiors of the empty cavities. A corrugated reflector below the solar collector reflects light passing through the empty cavities toward the cavities having the energy absorbing elements. The elongated solar energy absorbing elements may be configured as one such continuous element which is alternately run back and forth through the alternate cavities to form plural meandering fluid paths through the solar collector.