Roofing elements and system

A system for mounting a panel array to a surface, said system comprising:

• a) a plurality of battens operatively attached to said surface, each said batten comprising a plurality of apertures having interior walls;
• and,
• b) a plurality of panel holding clips arranged to span two adjacent panels of said panel array and configured to apply holding tension to both said adjacent panels when deployed, each said panel holding clip comprising
• i) a first segment arranged parallel to said adjacent panels where said adjacent panels overlap, said first segment having a hook portion extending around an edge of an upper one of said overlapping adjacent panels,
• ii) a second segment extending from said first segment at a first angle to said first segment, and extending beyond a lower one of said overlapping adjacent panels;
• and,
• iii) a third segment extending at a second angle from said second segment substantially perpendicularly to said first segment and into one of said apertures in one of said battens, creating tension with said first segment and said second segment, wherein said third segment effects a spring-tension fit in said aperture;
• wherein said third segment is configured in a substantially U-shape, said third segment comprising:
• a) a main portion, extending from said second segment in a direction substantially 90° to said first segment;
• b) a cross piece arranged 90° from said main portion, and extending from said main portion;
• and,
• c) a distal portion extending from said cross piece at a substantially 90° angle to said cross piece.