The present disclosure relates to a photovoltaic system comprising a switching device for switching on and off at least one photovoltaic string, to an electronically controlled direct current hybrid switching device for switching on and off at least one photovoltaic string, in a user-controlled manner, to the use of a hybrid switch for switching a photovoltaic string, and to a method for switching off and back on at least one photovoltaic string of the photovoltaic system. The photovoltaic system comprises: at least one photovoltaic string, wherein the at least one photovoltaic string is formed by photovoltaic modules which are series-connected by means of a string line and thus generate a string voltage; a switching device which is installed in series in the string line to switch on and off the at least one photovoltaic string with the switching device, wherein the switching device comprises a hybrid switch with a relay and a semiconductor switching device which is connected in parallel to the relay and has at least one semiconductor switch.

The present disclosure relates to a photovoltaic system comprising a switching device for switching on and off at least one photovoltaic string, to an electronically controlled direct current hybrid switching device for switching on and off at least one photovoltaic string, in a user-controlled manner, to the use of a hybrid switch for switching a photovoltaic string, and to a method for switching off and back on at least one photovoltaic string of the photovoltaic system. The photovoltaic system comprises: at least one photovoltaic string, wherein the at least one photovoltaic string is formed by photovoltaic modules which are series-connected by means of a string line and thus generate a string voltage; a switching device which is installed in series in the string line to switch on and off the at least one photovoltaic string with the switching device, wherein the switching device comprises a hybrid switch with a relay and a semiconductor switching device which is connected in parallel to the relay and has at least one semiconductor switch.

This system is directed to a batteryless, self-powered sensor comprising: a microprocessor; a first and second solar panel in electronic communications with the microprocessor; a transceiver in communication with the microprocessor; and a set of computer readable instructions included in the microprocessor adapted for creating motion data including a direction and a speed of movement of object within a first sensing area and a second sensing area, transmitted the motion data to a remote location if sufficient power is provided by the first solar panel to actuate the transceiver and a number of data points in the motion data exceeds a pre-determined number of minimal data points, associating a reduction in power delivered from the first solar panel to the microprocessor with movement and associating an increase in power delivered from the first solar panel to the microprocessor with movement.

This system is directed to a batteryless, self-powered sensor comprising: a microprocessor; a first and second solar panel in electronic communications with the microprocessor; a transceiver in communication with the microprocessor; and a set of computer readable instructions included in the microprocessor adapted for creating motion data including a direction and a speed of movement of object within a first sensing area and a second sensing area, transmitted the motion data to a remote location if sufficient power is provided by the first solar panel to actuate the transceiver and a number of data points in the motion data exceeds a pre-determined number of minimal data points, associating a reduction in power delivered from the first solar panel to the microprocessor with movement and associating an increase in power delivered from the first solar panel to the microprocessor with movement.

The present disclosure provides a broadband dual-polarized solar cell antenna and an antenna array. The broadband dual-polarized solar cell antenna includes an antenna dipole layer, an isolation layer, a solar cell layer, and a ground that are arranged sequentially from top to bottom, where the antenna dipole layer is connected to the ground and a radio frequency (RF) coaxial connector through a metal feeding probe structure, the solar cell layer is placed on the ground, the isolation layer is located between the antenna dipole layer and the solar cell layer, and the isolation layer is made of a transparent material. The present disclosure is small in sunlight shielding and high in transparency, and has a broadband dual-polarized wide-angle scanning capability, which ensures performance of the antenna and power generation efficiency of the solar cell, and is highly applicable in engineering.

Various examples are directed to a solar power electrolyzer system comprising a first electrolyzer stack, a second electrolyzer stack, a first converter and a first converter controller. The first electrolyzer stack may be electrically coupled in series with a photovoltaic array. The first converter may be electrically coupled in series with the first electrolyzer stack and electrically coupled in series with the photovoltaic array. The second electrolyzer stack electrically may be coupled at an output of the first converter. The first converter controller may be configured to control a current gain of the first converter.

Various examples are directed to a solar power electrolyzer system comprising a first electrolyzer stack, a second electrolyzer stack, a first converter and a first converter controller. The first electrolyzer stack may be electrically coupled in series with a photovoltaic array. The first converter may be electrically coupled in series with the first electrolyzer stack and electrically coupled in series with the photovoltaic array. The second electrolyzer stack electrically may be coupled at an output of the first converter. The first converter controller may be configured to control a current gain of the first converter.

A power converter box and at least one junction box are integrated on a backplane of the photovoltaic module as a whole, and there is a cable for connecting the power converter and the junction box. In this case, relative to the conventional technology in which a junction box is independent of a power converter, a length of a cable used when the junction box and the power converter box are taken as a whole is shorter than a length of a cable used in the conventional technology. In this case, compared with the conventional technology in which a cable is connected to an independently placed power converter, the power converter only needs to establish a connection relationship by using a solder ribbon, a circuit board cable, and the like with low costs, so that production costs are low.

A monitoring/control system is used for a solar power generation site in which a large number of solar modules includes a plurality of solar cell groups each including a plurality of solar cells, wherein power generation output from each of the solar cell groups is connected in parallel from a cell group controller to an in-module parallel connection line, and the in-module parallel connection line is connected in parallel from an optimizer to an inter-solar-module parallel connection line and is concentrated in a junction box. The monitoring/control system includes a relay terminal collecting data of the cell group controller and accumulating data of the optimizer, a server including a communication control device and carrying out an upload/download process of management/control data via a public telecommunication network between the relay terminal and a remote terminal at an integrated management site, and the remote information terminal installed at a remote site.

A photovoltaic power generation system and a method for controlling power balance are provided. The system includes at least two photovoltaic arrays, at least one power balance circuit and a power converter. Each of input ports of the power balance circuit is connected with at least one photovoltaic array, and an output port of the power balance circuit is connected with the power converter. The power balance circuit performs power transfer based on a difference between output powers of the two photovoltaic arrays to control a difference between powers of two output terminals of the power balance circuit to be within a preset range.