A method of diagnosing malfunctioning of a bypass diode in a solar photovoltaic battery system is provided. The method may include: collecting solar photovoltaic battery operation information indicating a solar photovoltaic battery operation state, from a signal of a solar photovoltaic battery detection unit, while maximum power point tracking control is performed with the solar photovoltaic battery system in operation; and determining whether or not the bypass diodes based on the collected solar photovoltaic battery operation information.

A measurement method of subcell photocurrents and a matching degree of the subcell photocurrents of a multi-junction photovoltaic cell is provided. The measurement method includes measuring an I-V characteristic of the multi-junction photovoltaic cell; and measuring currents corresponding to respective current steps in an I-V curve to obtain approximate values of short-circuit currents of subcells in the multi-junction photovoltaic cell, and then calculating a mismatching degree of the multi-junction photovoltaic cell using step currents. According to the measurement method, a current mismatching degree of the multi-junction photovoltaic cell is obtained by calculating the mismatching degree of the step currents occurring in the I-V curve. The measurement method is rapid and simple, the measurement method avoids complicated and time-consuming processes where the subcell photocurrents are calculated based on a standard light source spectrum integral with bias lights applied.

A system and a method of controlling a solar roof of a vehicle are provided. The system includes a solar cell panel and a controller that controls charging of a main battery and an auxiliary battery using power generated from the solar cell panel. A light amount sensor senses the amount of light collected in the solar cell panel and a temperature sensor measures a surface temperature of the solar cell panel.

Discussed is a solar cell including a first conductive region positioned at a front surface of a semiconductor substrate and containing impurities of a first conductivity type or a second conductivity type, a second conductive region positioned at a back surface of the semiconductor substrate and containing impurities of a conductivity type opposite a conductivity type of impurities of the first conductive region, a first electrode positioned on the front surface of the semiconductor substrate and connected to the first conductive region, and a second electrode positioned on the back surface of the semiconductor substrate and connected to the second conductive region. Each of the first and second electrodes includes metal particles and a glass frit.

A holding means for a solar roof tile includes an oblong beam extending in a longitudinal direction, a first support supported in a mounted position on a first upper batten of a pitched roof and a second support supported in the mounted position on a second lower batten. The holding means further includes at least one rest for the solar roof tile and a drain channel arranged adjacent to the at least one rest and extending in the longitudinal direction to drain atmospheric water along a longitudinal outer edge of the solar roof tile.

A system and method for statistical analysis of PV photovoltaic panel images for quantifying the percentage of reduction of electricity generation or the percentage of electricity generation of PV photovoltaic panels due to the soiling level of PV photovoltaic panels by means of a system for statistical analysis of PV photovoltaic panel images, using a camera capable of photographing the panels in the visible spectrum, a clean and properly functioning PV photovoltaic panel without the presence of soiling, shading, or operational faults, a string of soiled PV photovoltaic panels to be evaluated, a computer and an method for image analysis.

In various representative aspects, an assembly for connecting and electrically bonding two solar panel rail guides. More specifically, the assembly provides a splice that slides within two solar panel rail guides and includes an elongated spring element that is inserted into an elongated slot in the splice and enables the two solar panel rail guides to be electrically bonded together when various bonding techniques are used to allow portions of the spring to penetrate the oxidation layers of the inner surfaces of the rail guides as they are joined together. Another embodiment that utilizes a bonding element that is inserted into an elongated slot of a splice and also enables two solar panel rail guides to be electrically bonded when the rail guides are joined.

Structured photovoltaic assemblies and method of manufacture therefor. The assemblies can be assembled similar to flex circuits and have mechanical support structures disposed within the assembly. The supports can be sized and shaped to one or a group of solar cells in the assembly. The solar cells supported by a particular support may be interconnected with cells supported by a different support. The supports can be transparent. The connection of the interconnects to the solar cells can be enhanced by forming protrusions in vias through openings in the Insulating layer that are aligned with the solar cells. Alternatively, the openings can be filled with a conductive material in such forms as powder, ink, paste, or metal nanoparticles, and a laser can be used to melt and/or sinter the material to form the connection to the solar cell. These techniques can withstand large temperature swings over a large number of cycles, which occur in, for example, space applications.

A robotic system for providing a surface cleaning device to a solar panel device, the robotic system may include (a) a drive unit that is configured to move the robotic system in relation to the solar panel device; (b) a support unit that comprises guiding elements, the guiding elements are configured to support the surface cleaning device; wherein the guiding elements comprise a first guiding element and a second guiding element; (c) an alignment unit that is configured to align, during an alignment process, the first guiding element and the second guiding element with the solar panel device; (d) sensing units that comprises a first sensing unit and a second sensing unit; wherein the first sensing unit is configured to sense a first spatial relationship between the first guiding element and a first portion of the solar panel device; wherein the second sensing unit is configured to sense a spatial relationship.

The present invention relates to new energy vehicle field, and more particularly to vehicle-mounted tracking solar power generation system without photoelectric sensor. The current vehicle-mounted thin-film solar power generation device has a low power generation, inductive tracking technology has high cost and large volume, so neither of them can meet the electricity demand of new energy vehicles, therefore, at the moment when the photoelectric conversion rate is difficult to effectively improve in the short term, making the vehicle-mounted photovoltaic power generation system not only able to track but also has practicality, has become a technical problem that needs to be solved urgently in the vehicle-mounted solar charging industry, the present invention provides a solar tracking technology that adopts a combination of the orbital device and the platform, does not require real-time tracking and photoelectric sensors, and solves the above-mentioned technical problems well.