TECHNOLOGY FOCUS - ELECTRONICS - Preferred Junction Module: Each of the cavities has an opening, and the junction module further comprises covers, where each cover closes the corresponding opening in a detachable manner. The junction module further comprises seal rings, each provided between the cover and the corresponding opening to form a seal in between. At least one end of the housing is formed as a close end or is formed as an opening end having an outlet hole for connecting with an external cable directly or via a cable connector. The external cable is electrically connected, at the opening end, with at least one of the first and second conductive members in a detachable manner. The junction module further comprises a second clip constructed to clip together the core of the external cable and at least one of the first and second conductive members, where the second clip together with the first and second conductive members are provided in one of the cavities. The first and second conductive members comprise first and second conductive rails and connection conductors, where the connection conductors comprise two opposite sides which have substantially flat surfaces; and the first resilient clip, with a cross section which substantially forms a triangle having an opening on top, comprises a bottom wall and two sidewalls extending from the bottom wall at two sides of the bottom wall at an acute angle, where when the first resilient clip clamps the lug, the two opposite sidewalls of the clip contact with the lug and apply a bias force to the lug so that a stable electrical connection between the lug and the connection conductor is formed. The first and second connection conductors extend from the first and second conductive rails respectively and form integrally with the corresponding conductive rails. The first and second conductive rails are further provided with securing springs where two pins of the bypass diode are electrically connected with the first and second conductive rails. The above detachable manner is carried out by clasp connection, bolt connection, screw connection, stud connection or hinge connection. The housing comprises two cavities, and the bypass diode and one of the first and second conductors are provided in one cavity, while the other of the first and second conductive members is provided in the other cavity. The housing comprises three cavities; the first, the second conductive members, and the bypass diode are provided in the three cavities respectively.