Abstract: A solar collector comprises an evacuated glass tube (8), an absorbing section (9) comprising a radiation absorbing plate (10), an elongate tube (11, 15) for a working fluid in contact with the radiation absorbing plate (10) and a wire clip (25) for retaining the absorbing section (9) in position in the solar absorbing glass tube (8). The wire clip (25) consists of a single piece wire having a clamping portion (26) for clamping onto the outer surface of the working fluid tube (11, 15) and a pair of resilient side support sections (27) flanking the clamping portion (26). The side support sections (27) extend so that portions thereof engage against the inner surface of the solar absorbing tube (8).

Abstract: A solar collector comprises an evacuated glass tube (8), an absorbing section (9) comprising a radiation absorbing plate (10), an elongate tube (11, 15) for a working fluid in contact with the radiation absorbing plate (10) and a wire clip (25) for retaining the absorbing section (9) in position in the solar absorbing glass tube (8). The wire clip (25) consists of a single piece wire having a clamping portion (26) for clamping onto the outer surface of the working fluid tube (11, 15) and a pair of resilient side support sections (27) flanking the clamping portion (26). The side support sections (27) extend so that portions thereof engage against the inner surface of the solar absorbing tube (8).