Abstract: A bridge that may include a first photovoltaic (PV) panel holder, a second PV panel holder; and a body. The body is movably coupled, via a first interface, to the first PV panel holder and is detacheably coupled to the second PV panel holder, wherein the body is configured to move between a first position to a second position when the second PV panel holder is detached from the body, wherein when positioned at the second position, a portion of the body extends above the first PV panel holder.

Abstract: A surface cleaning device for cleaning surfaces of solar panels, wherein the surface cleaning device may include a main body, at least one extension that extends to at least one side of the main body and comprise at least one extension wheel for interfacing with the solar panels, a first dust carrying member, a second dust carrying member, a motor; and one or more motion delay assemblies; wherein the first dust carrying member and the second dust carrying member are coupled to the motor; wherein the motor is configured to cyclically move the first dust carrying member and the second dust carrying member along a path; wherein the one or more motion delay assemblies are is configured to cyclically introduce a momentarily delay in a progress of the first dust carrying member along the path.

Abstract: A surface cleaning device for cleaning a surface of a solar panel, wherein the surface cleaning device may include a motion delay assembly, a first dust carrying member and a second dust carrying member that are coupled to a motor; wherein the first dust carrier member and the second dust carrier member are wipers. The motor is configured to cyclically move the first dust carrying member and the second dust carrying member along a path. The motion delay assembly is configured to cyclically introduce a momentarily delay in a progress of the first dust carrying member along the path, while the second dust carrying member contacts the surface thereby reducing a gap between the first dust carrying member and the second dust carrying member, compress the air within the gap, and induce air that is compressed in the gap to exit the gap and progress along the surface and remove dust that precedes the second dust carrying member.

Abstract: A bridge that may include a first photovoltaic (PV) panel holder, a second PV panel holder; and a body. The body is movably coupled, via a first interface, to the first PV panel holder and is detacheably coupled to the second PV panel holder, wherein the body is configured to move between a first position to a second position when the second PV panel holder is detached from the body, wherein when positioned at the second position, a portion of the body extends above the first PV panel holder.

Abstract: A structural steel member connecting assembly includes a first connecting member and a second connecting member. The first connecting member is pivotally connected to a positioning portion of a first structural steel member and therefore can be swung. The second connecting member is pivotally connected to the first connecting member such that the two connecting members are rotatable with respect to each other. The second connecting member has a fixing portion coupled with a second structural steel member such that the longitudinal directions of the two structural steel members intersect. With the second connecting member rotatable with respect to the first connecting member, the installation angles of the two structural steel members can be easily changed in order to make a stable engineering structure. The structural steel member connecting assembly features convenience of, and flexibility in, use and has extensive applications.

Abstract: 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.

Abstract: A surface cleaning device that may include an axis; dust cleaning elements that are connected to the axis and comprise multiple fins that comprise (i) one or more first fins of a first durability and a first cleaning capability and (ii) one or more second fins of a second durability and a second cleaning capability, wherein the first durability exceeds the second durability and the second cleaning capability exceeds the first cleaning capability; and a rotating mechanism for rotating the axis and the multiple fins.

Abstract: An inflatable motor boat with a U-shaped hull in plan view and configured to operate in shallow water. An inflatable bottom is attached to the hull and comprises an inclined longitudinal tunnel having an arc-shaped form in cross section. A portion of the tunnel is wedge-shaped with an angle of inclination from 5° to 45°. The width of the tunnel can be reduced in a rearward direction, and an upper surface of the tunnel can have a sinusoidal shape in a longitudinal section.

Abstract: A surface cleaning device for cleaning a surface of a solar panel, wherein the surface cleaning device may include a motion delay assembly, a first dust carrying member and a second dust carrying member that are coupled to a motor; wherein the first dust carrier member and the second dust carrier member are wipers. The motor is configured to cyclically move the first dust carrying member and the second dust carrying member along a path. The motion delay assembly is configured to cyclically introduce a momentarily delay in a progress of the first dust carrying member along the path, while the second dust carrying member contacts the surface thereby reducing a gap between the first dust carrying member and the second dust carrying member, compress the air within the gap, and induce air that is compressed in the gap to exit the gap and progress along the surface and remove dust that precedes the second dust carrying member.

Abstract: A bridge that may include a first photovoltaic (PV) panel holder, a second PV panel holder; and a body. The body is movably coupled, via a first interface, to the first PV panel holder and is detacheably coupled to the second PV panel holder, wherein the body is configured to move between a first position to a second position when the second PV panel holder is detached from the body, wherein when positioned at the second position, a portion of the body extends above the first PV panel holder.

Abstract: A surface cleaning device for cleaning a surface of a solar panel, wherein the surface cleaning device may include: a first dust carrying member; a second dust carrying member; a motor; and a motion delay assembly. The first dust carrying member and the second dust carrying member are coupled to the motor; wherein the motor is configured to cyclically move the first dust carrying member and the second dust carrying member along a path. The motion delay assembly is configured to cyclically introduce a momentarily delay in a progress of the first dust carrying member along the path, while the second dust carrying member contacts the surface thereby reducing a gap between the first dust carrying member and the second dust carrying member and induce air to exit the gap and progress along the surface and remove dust that precedes the second dust carrying member.

Abstract: A positioning foot block for the mounting of an upright bar is disclosed to include a support device having a bottom wall, two side walls respectively extended from opposing left and right sides of the bottom wall and a positioning space surrounded by the bottom wall and the side walls for receiving the upright bar. Each side wall of the support device has two side lugs respectively extended from opposing front and rear sides thereof toward the positioning space and respectively clamped on respective corner ends of the upright bar. Thus, the structural design of the positioning foot block can clamp the corner ends of the upright bar firmly, prohibiting the upright bar from vibration and enhancing its positioning stability.

Abstract: A joint device includes a main fixing plate, an auxiliary fixing plate, and a fastener. The main fixing plate has a vertical wall disposed between a longitudinal beam and a transverse beam, a first extending wall extending towards a side of the longitudinal beam from the vertical wall and crossing over and abutting against an upper portion of the longitudinal beam, and a second extending wall extending towards a side of the transverse beam from the vertical wall and crossing over and abutting against a lower portion of the transverse beam. The auxiliary fixing plate is disposed in an open groove of the transverse beam in a way that the transverse beam is clamped between the auxiliary fixing plate and the vertical wall of the main fixing plate. The fastener secures the longitudinal beam, the transverse beam, the main fixing plate and the auxiliary fixing plate together.

Abstract: A method for forming thin film solar cell materials introducing a first inert gas mixture that includes hydrogen selenide into a chamber at a first pressure value until the chamber reaches a second pressure value and at a first temperature value, wherein the second pressure value is a predefined percentage of the first pressure value. The temperature in the chamber is increased to a second temperature value for a selenization process so that the pressure in the chamber increases to a third pressure value. Residual gas that is generated during the selenization process can be removed from the chamber. A second inert gas mixture that includes hydrogen sulfide is added into the chamber until the chamber reaches a fourth pressure value. The temperature in the chamber is increased to a third temperature value for a sulfurization process. The chamber is cooled after the sulfurization process.

Abstract: A method includes depositing spacers at a plurality of locations directly on a back contact layer over a solar cell substrate. An absorber layer is formed over the back contact layer and the spacers. The absorber layer is partially in contact with the spacers and partially in direct contact with the back contact layer. The solar cell substrate is heated to form voids between the absorber layer and the back contact layer at the locations of the spacers.

Abstract: A method of fabricating a photovoltaic device includes a step of forming an absorber layer above a substrate, and a step of forming a surface layer on the absorber layer. The absorber layer includes an I-III-VI2 compound, which contains a Group I element, a Group III element and a Group VI element. The surface layer includes an I-III-VI2 compound, which contains a Group I element, a Group III element and a Group VI element, and has an atomic ratio of the Group I element to the Group III element in the range of from 0.1 to 0.9.

Abstract: A removable cover system for protecting solar cells from exposure to moisture during fabrication processes. The cover system includes a cover having a configuration that complements the configuration of a solar cell substrate to be processed in an apparatus where moisture is present. A resiliently deformable seal member attached to the cover is positionable with the cover to engage and seal the top surface of the substrate. In one embodiment, the cover is dimensioned and arranged so that the seal member engages the peripheral angled edges and corners of the substrate for preventing the ingress of moisture beneath the cover. An apparatus for fabricating a solar cell using the cover and associated method are also disclosed.

Abstract: A method for monitoring the process of fabricating solar cells generally comprises performing a reaction process in a chamber for a solar cell substructure, wherein the chamber includes a reaction solution that includes at least one chemical component. A concentration value is detected for the chemical component during the reaction process, via a detection assembly that is coupled to the chamber. The method further includes determining whether the detected concentration value is at a predefined threshold concentration level or within a predefined concentration range for the chemical component, via a control assembly that is coupled to the detection assembly. The concentration of the chemical component within the reaction solution is modified, during the reaction process, when the detected concentration value is different from the predefined threshold concentration level or different from the predefined concentration range.

Abstract: A solar cell device and a method of fabricating the device is described. The solar cell is fabricated by providing a substructure comprising an absorber over a back contact having a P1 line therein and scribing a P2 line in the absorber by mechanical scribing and laser scribing after the mechanical scribing. The scribing can be performed with an integrated scriber, including a scribing tip and a light source mounted adjacent the scribing tip and operable concurrently with the scribing tip.