Abstract: A method for predicting a future timing when the current value or power generation quantity of a module, string or power conditioner will have been lowered by a specific level from its present current value or power generation quantity. This method makes it possible to know an appropriate timing when a maintenance of the solar power generation system is to be performed, and attain a planned maintenance.

Abstract: In a terminal plate circuit in which the bottom surface of the diode is attached to the surface of the terminal plate with solder so as to dissipate the heat of the diode, heat transfer from the diode to the terminal plate is facilitated by removing the air bubbles in the solder during the soldering. A terminal plate circuit configured in such a manner that a metal part of a bottom surface of a diode of surface mounting type is soldered onto a surface of a terminal plate that is larger than the metal part, characterized in that streaks consisting of a plurality of lines that do not intersect with each other are formed on the surface of the terminal plate onto which the diode is to be soldered, whereby air bubbles generated within the solder during the soldering are let to escape from a lower surface of the diode to outside through the streaks. This terminal plate circuit is suitable for the use in a terminal box for solar cell panel.

Abstract: A solar cell module, having a solar cell panel including a front-surface light-transmitting member, a rear-surface light-transmitting member, and a solar cell arranged between these members, and a terminal box for taking out an electric current from the solar cell panel, and further having a bus bar laid to transmit an electric current generated from the solar cell inside the solar cell panel through an end of the solar cell panel to a terminal plate inside the terminal box, wherein the terminal box is fitted to the panel in a manner so as to cover the end of the solar cell panel, through which the bus bar is passed, and further cover a light-receiving surface side region of the front-surface light-transmitting member, and a light-receiving surface side region of the rear-surface light-transmitting member, these regions being adjacent to the end.

Abstract: A direct-current stabilized power supply device for stepping down an input voltage from a solar cell, including: a first constant voltage power supply circuit connected to the solar cell and including a constant current limiter circuit; a switch circuit; a switching-type second constant voltage power supply circuit connected to the switch circuit; and a voltage detection circuit that detects the output voltage of the first constant voltage power supply circuit. When the detected output of the first power supply circuit is equal to or higher than a first determination voltage, the switch circuit is closed, and power is supplied to the load from the second power supply circuit, and when the detected voltage is equal to or lower than a second, lower, determination voltage the switch circuit is opened, and the power supplied from the second power supply circuit is stopped.

Abstract: The present invention provides an apparatus for easily detecting an abnormal status of power generation of a solar cell panel in a solar cell power generation system having the power generation of 1 MW or higher. The present invention provides an abnormality detecting apparatus for a solar cell power generation system including a plurality of solar cell strings each having a plurality of solar cell modules connected to each other in series and a backflow preventing diode connected to a power output terminal of each of the solar cell strings, characterized in that the abnormality detecting apparatus further includes measuring means for measuring a current flowing in the backflow preventing diode; and that the measuring means is supplied with electric power from both terminals of the backflow preventing diode.

Abstract: A failure detecting method for a solar power generation system having plural solar cell strings in each of which plural solar cell modules are connected to each other in series. Specifically, by comparing the current value of each of the solar cell modules or strings with the average current value per one module or string, calculated from the total current value of the entire solar cell modules or strings, one or more failure candidates can be detected with high precision.

Abstract: A direct-current stabilized power supply device that drops a voltage from a power supply of a solar cell in which output power is unstable, and supplies a stable voltage necessary for measurement equipment and the like.

Abstract: The present invention discloses a failure detecting method for a solar power generation system having plural solar cell strings in each of which plural solar cell modules are connected to each other in series.

Abstract: A solar cell module, having a solar cell panel including a front-surface light-transmitting member, a rear-surface light-transmitting member, and a solar cell arranged between these members, and a terminal box for taking out an electric current from the solar cell panel, and further having a bus bar laid to transmit an electric current generated from the solar cell inside the solar cell panel through an end of the solar cell panel to a terminal plate inside the terminal box, wherein the terminal box is fitted to the panel in a manner so as to cover the end of the solar cell panel, through which the bus bar is passed, and further cover a light-receiving surface side region of the front-surface light-transmitting member, and a light-receiving surface side region of the rear-surface light-transmitting member, these regions being adjacent to the end.

Abstract: The present invention provides a diode that does not deteriorate its function even if it is used in an environment where the temperature change is considerable, such as in a terminal box for solar cell panel that is placed outdoors. A diode of twin-chip-mounting type in which each chip has a lead foot for being joined to a common terminal plate, wherein said lead feet are electrically connected with each other in a region of each lead foot from each chip to a portion wherein each lead foot is joined. The electrical connection of the lead feet is preferably formed by integral molding with each lead foot.

Abstract: The present invention provides an apparatus for easily detecting an abnormal status of power generation of a solar cell panel in a solar cell power generation system having the power generation of 1 MW or higher. The present invention provides an abnormality detecting apparatus for a solar cell power generation system including a plurality of solar cell strings each having a plurality of solar cell modules connected to each other in series and a backflow preventing diode connected to a power output terminal of each of the solar cell strings, characterized in that the abnormality detecting apparatus further includes measuring means for measuring a current flowing in the backflow preventing diode; and that the measuring means is supplied with electric power from both terminals of the backflow preventing diode.

Abstract: A terminal plate circuit including a terminal plate, a rectangular wire, and a pressing member, characterized in that a hole through which the rectangular wire penetrates is provided in the terminal plate; the rectangular wire is inserted into this hole so as to establish an electrical contact between the terminal plate and the rectangular wire; and the contact state is maintained by a pressing force of the pressing member to the part of the surface of the rectangular wire on the side opposite to the part of the surface of the rectangular wire that is in contact with the terminal plate, and that the pressing member has a sandwiching part that can sandwich the end of the terminal plate, and the pressing force of the pressing member to the rectangular wire is generated by sandwiching the end of the terminal plate with this sandwiching part.

Abstract: A means for effectively preventing the temperature rise of the diode when the bypass diode is operating in a terminal box for a crystalline silicon solar cell panel is provided. The present invention is characterized in that, in the terminal box for a crystalline silicon solar cell panel, Schottky barrier diode is used as a bypass diode. Preferably, the forward-direction voltage drop of the Schottky barrier diode is the specific value or below at the specific junction temperature. Preferably, as a Schottky barrier diode, a package diode which is surface-mounting type or non-insulation type is used.

Abstract: The present invention provides a terminal plate circuit in which the reliability of an electrical connection state between a terminal plate and a rectangular wire is enhanced by a simple method.

Abstract: In a terminal plate circuit in which the bottom surface of the diode is attached to the surface of the terminal plate with solder so as to dissipate the heat of the diode, heat transfer from the diode to the terminal plate is facilitated by removing the air bubbles in the solder during the soldering. A terminal plate circuit configured in such a manner that a metal part of a bottom surface of a diode of surface mounting type is soldered onto a surface of a terminal plate that is larger than the metal part, characterized in that streaks consisting of a plurality of lines that do not intersect with each other are formed on the surface of the terminal plate onto which the diode is to be soldered, whereby air bubbles generated within the solder during the soldering are let to escape from a lower surface of the diode to outside through the streaks. This terminal plate circuit is suitable for the use in a terminal box for solar cell panel.

Abstract: The present invention provides a diode that does not deteriorate its function even if it is used in an environment where the temperature change is considerable, such as in a terminal box for solar cell panel that is placed outdoors. A diode of twin-chip-mounting type in which each chip has a lead foot for being joined to a common terminal plate, wherein said lead feet are electrically connected with each other in a region of each lead foot from each chip to a portion wherein each lead foot is joined. The electrical connection of the lead feet is preferably formed by integral molding with each lead foot.