In the adhesion structure of a box member according to the present invention, the box member adheres to a adhesion surface with an adhesive member, a corner between a bottom surface and a side surface of the box member has a curved portion of a curved shape such that the adhesive member remains between the adhesion surface and the curved portion, thereby providing an adhesion structure of the box member that can readily achieve a larger adhesive strength in a smaller space.
Connecting terminals (25a to 25d) are accommodated side by side in a terminal box casing (21). Diodes (30a to 30c) are connected electrically between the respective connecting terminals (25a to 25d). The diodes (30a to 30c) are connected in series via the intermediate terminal mounts (28a, 28b). Partition walls (24) for partitioning diode accommodation spaces (23a to 23c) for at least partly accommodating the diodes (30a to 30c) are formed in the terminal box casing (21).
A terminal box is provided for covering an exposed electrode portion of a photovoltaic element. A part or all of each side of the terminal box includes an inclined surface.
In an inductor having a core and first and second coils wound upon the core, the wire of the first coil and the wire of the second coil lie are wound so as to lie parallel to each other and contact the core. The winding starting position of the first coil is made to coincide with the winding starting position of the second coil along the axial direction of the core and is offset from the winding starting position of the second coil along the winding direction of the core. As a result, the area factor of the coils in the winding area of the inductor can be improved and the size of the inductor reduced.
AC module makers must prepare two types of AC modules for the 100-V and 200-V outputs only for domestic supply. For foreign countries, the makers must manufacture AC modules compatible with more system voltages. To solve these problems, the control circuit of an AC module controls the operation of an inverter circuit and/or the transformation ratio of a transforming circuit, and ON/OFF-controls a switch on the basis of the system voltage and connection state of an electric power system.
