Arrangement with an apparatus supporting a solar energy collection device on at least one roof element

摘要

A joiner piece (1501) for joining an end of an upper rail to an end of a lower rail, in which each of the rails has at least one side gutter. The joiner piece comprises an outer section (1502) configured to fit around the outside of the upper rail (1601), and an inner section (1503) configured to fit inside the side gutter (1603, 1604) of the lower rail (1602), such that in use the joiner piece channels fluid from the gutter of the upper rail to the gutter of the lower rail.