A method, system, apparatus, and/or device for preheating air for a rooftop air handling unit (RTU). The method, system, apparatus, and/or device may include a barrier system configured to surround the RTU. The barrier system may include a structure to provide a frame for the barrier system, a first barrier configured to connect to a first side of the structure, and a collector configured to connect to a second side of the structure. The method, system, apparatus, and/or device may include a duct configured to connect between the collector and a chamber. The method, system, apparatus, and/or device may include a chamber configured to connect to an air intake hood of the RTU. The chamber may include a first opening to receive air stored in the cavity, a second opening to receive external air, and a diverter configured to switch between a first position and a second position.

A method, system, apparatus, and/or device for preheating air for a rooftop air handling unit (RTU). The method, system, apparatus, and/or device may include a barrier system configured to surround the RTU. The barrier system may include a structure to provide a frame for the barrier system, a first barrier configured to connect to a first side of the structure, and a collector configured to connect to a second side of the structure. The method, system, apparatus, and/or device may include a duct configured to connect between the collector and a chamber. The method, system, apparatus, and/or device may include a chamber configured to connect to an air intake hood of the RTU. The chamber may include a first opening to receive air stored in the cavity, a second opening to receive external air, and a diverter configured to switch between a first position and a second position.

A photovoltaic solar power plant assembly and a method of using said assembly to generate power are disclosed. The assembly includes an array of photovoltaic solar modules arranged in a solar module surface, and an optical structure for redirecting light towards said solar module surface, having a redirected light emitting surface. The optical structure includes: a planar optical waveguide which has a parallel first and second planar waveguide surfaces, wherein the first planar waveguide surface extends parallel to the redirected light emitting surface, wherein the first planar waveguide surface is at least partially covered by a photonic layer which is configured to provide an angular restriction of a light emission from the planar waveguide through the redirected light emitting surface, and a light scattering and/or luminescent material, which material is arranged as particles in the planar optical waveguide and/or in a layer which at least partially covers the second planar waveguide surface.

A roofing, cladding or siding product which is light weight, easy to install, durable and resistant to environmental wear. The module comprises an underlapping region and an exposed region, wherein the underlapping region is adapted to be at least partially covered by the exposed region of an adjacent module when installed on a building surface. The module also includes a textured surface area on an upper surface of the underlapping region and/or an underside of the exposed region. In use, the textured surface (e.g. made up from a densely packed group of cones, pyramids or cylinders) presents an increased surface area for improved contact with an adhesive. The adhesive, e.g. in strip form, may by located on an aligning part of an adjacent module with the textured surface area.

The present invention relates to devices and systems for collecting and storage of solar energy, wherein the system for storing and retrieving captured temperature based energy comprising: one or more thermal collectors (5, 60), an energy carrier (29), a piping system (3, 7, 34, 35, 36), pumping device for controlling the flow of the energy carrier (29), and one or more ground thermal storage systems (30).

The present invention relates to devices and systems for collecting and storage of solar energy, wherein the system for storing and retrieving captured temperature based energy comprising: one or more thermal collectors (5, 60), an energy carrier (29), a piping system (3, 7, 34, 35, 36), pumping device for controlling the flow of the energy carrier (29), and one or more ground thermal storage systems (30).

A solar heat exchanger for heating water which includes an array of tubes, an injection molded manifold there being connections between each tube in the array and the manifold which are over molded to seal the tubes to the manifold.

A tile replacement flashing is used with a tile hook. A bottom tile replacement flashing is shaped for placement on a lower portion of a location where a tile is removed from a roof. A top tile replacement flashing is shaped for placement on an upper portion of a location where the tile is removed from the roof. The top tile replacement flashing includes an elevated region at a lower portion of the top tile replacement flashing, the elevated region. The bottom tile replacement flashing is shaped so that after attachment of the bottom tile replacement flashing on the roof, the tile hook can be attached to a rafter of the roof, the attached tile hook extending over an upper portion of the bottom tile replacement flashing and having a portion that, past the upper portion of the bottom tile replacement flashing, extends upwards. The top tile replacement flashing is shaped so that after attachment of the top tile replacement flashing on the roof, at least part of the elevated region of the top tile replacement flashing extends over the bottom tile replacement flashing. A height of the elevated region is sufficient to allow room for the tile hook to extend over the bottom tile replacement flashing and under the elevated region of top tile replacement flashing.

A tile replacement flashing is used with a tile hook. A bottom tile replacement flashing is shaped for placement on a lower portion of a location where a tile is removed from a roof. A top tile replacement flashing is shaped for placement on an upper portion of a location where the tile is removed from the roof. The top tile replacement flashing includes an elevated region at a lower portion of the top tile replacement flashing, the elevated region. The bottom tile replacement flashing is shaped so that after attachment of the bottom tile replacement flashing on the roof, the tile hook can be attached to a rafter of the roof, the attached tile hook extending over an upper portion of the bottom tile replacement flashing and having a portion that, past the upper portion of the bottom tile replacement flashing, extends upwards. The top tile replacement flashing is shaped so that after attachment of the top tile replacement flashing on the roof, at least part of the elevated region of the top tile replacement flashing extends over the bottom tile replacement flashing. A height of the elevated region is sufficient to allow room for the tile hook to extend over the bottom tile replacement flashing and under the elevated region of top tile replacement flashing.

Systems and methods for mounting solar panels include a curb assembly coupled to a top surface of a roof. An end of a solar panel rests on a portion of the assembly. An astragal is located with a portion of the astragal extending over the edge of the solar panel. A fastener is engaged through the astragal and the curb assembly such that a portion of the astragal contacts and compressively engages the top surface of the supported solar panel edge, whereby the solar panel is mounted to the roof. Moreover, systems and methods cleaning solar panels of a solar panel system installed on an exterior surface are also described.