| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint box capable of disconnecting individual solar cell strings completely from other solar cell strings, in a photovoltaic power generation system of negative ground specification.SOLUTION: The joint box for photovoltaic power generation system includes a plurality of branch switches for switching each solar cell string. Each branch switch 15 includes a positive electrode switch for switching the positive electrode of a solar cell string by connecting a plurality of poles in series, and a negative electrode switch for switching the negative electrode of a solar cell string by a single pole. A housing that includes the negative electrode switch, and a housing that houses only the positive electrode switch are individual housings separable from each other, and the branch switch is constituted by arranging them adjacently. |
