Cooling device 1, in particular a freezer 2, having a closable cooling space 3, an electrically operated cooling circuit, and preferably a cold storage pack 4, wherein the at least one closable cooling space 3 and the cold storage pack 4 can be cooled by the electrically operated cooling circuit. The cooling device has a power distributor 5 for distributing electrical power of at least one regenerative power source 6 to an electrically operated cooling circuit of the cooling device 1 and to at least one further electricity consuming device 7. In addition, the power distributor 5 has a control system with a computing unit 23, a memory 24 and priority logic. The priority logic is used to preferentially supply the electrically operated cooling circuit of the cooling device 1 with electricity if there is a lack of electrical power of the at least one regenerative power source 6.

Polymer-based selective radiative cooling structures are provided which include a selectively emissive layer of a polymer or a polymer matrix composite material. Exemplary selective radiative cooling structures are in the form of a sheet, film or coating. Also provided are methods for removing heat from a body by selective thermal radiation using polymer-based selective radiative cooling structures.

Cooling device 1, in particular a freezer 2, having a closable cooling space 3, an electrically operated cooling circuit, and preferably a cold storage pack 4, wherein the at least one closable cooling space 3 and the cold storage pack 4 can be cooled by the electrically operated cooling circuit. The cooling device has a power distributor 5 for distributing electrical power of at least one regenerative power source 6 to an electrically operated cooling circuit of the cooling device 1 and to at least one further electricity consuming device 7. In addition, the power distributor 5 has a control system with a computing unit 23, a memory 24 and priority logic. The priority logic is used to preferentially supply the electrically operated cooling circuit of the cooling device 1 with electricity if there is a lack of electrical power of the at least one regenerative power source 6.

Refrigerator operation powers includes battery, solar, and electric. Designed for users needing energy saving appliances and users with power outages. It has at least two compartments for frozen and unfrozen food and drinks. Has retractable handle and assembled wheels to move refrigerator.

Microwave oven operation power includes battery, solar, and electric and is designed to prepare food and drinks. Designed for users with power outages or users needing energy efficient appliance. Has retractable handle and wheels to move microwave.

Cooktop grill operation power includes battery, solar, and electric. Designed to prepare food. It is designed for users who need energy saving appliance and users with power outages. Cooktop grill has at least five cooking options on top surface. Has retractable handle and at least four wheels to move cooktop grill.

Battery operated fireplace heater have three power options battery, electric, and solar. It has a retractable handle and four wheels for users to move fireplace heater. This fireplace heater is a fireplace and/or heater.

Dual blender mixer has three compartments for battery, electric, or solar power options. Dual blender mixer can prepare foods and drinks with at least two different containers.

A system for a portable cooling device is disclosed herein. The portable cooling device comprises a housing and a door with a handle coupled to the housing for providing access to the interior of the housing. The door and housing are insulated. At least one fan is provided in the interior of housing. In an embodiment, a plurality of fans are configured on each surface defining the interior of the housing. A cooling medium source is in fluid communication with the housing. The cooling medium source is configured to release a cooling medium in the interior of the housing for cooling an edible item or beverage placed in the interior of the housing. The portable cooling device can be powered through solar means or through traditional electrical means. The power is necessary to operate the fans and the cooling medium source.

Certain embodiments are directed to a lighting device comprising one or more of the following: a plurality of LEDs; a plurality of optic devices corresponding to the plurality of LEDs; at least one optical separator for substantially preventing the light emitted from one LED from effecting the other LEDs; a thermoelectric device configured to harvest heat generated by the LEDs and convert the harvested heat into electrical energy; and a low temperature material for creating a temperature difference across the thermoelectric device.

An intelligent shading umbrella comprises a base assembly, an umbrella support assembly coupled to a base assembly, a first memory, a first processor coupled to the first memory, and a computing device, wherein the computing device has a non-volatile memory having computer-readable instructions stored thereon, a second memory, and a second processor. A first processor communicates commands and/or signals to the umbrella support assembly to cause movement of the umbrella support assembly. A second processor, of the computing device, is enclosed within the intelligent shading object fetches computer-readable instructions from the non-volatile memory, loads the computer-readable instructions from the non-volatile memory into the second memory, and executes the computer-readable instructions to communicate with external computing devices and/or to generate commands and/or signals to the first processor to request movements of the umbrella shading assembly.

Photovoltaic energy generation device, characterized in that it comprises at least one brick (120) comprising a lower terminal and an upper terminal, between which are arranged two cells (111), each comprising a photovoltaic cell (7), comprising one or more elementary photovoltaic cell(s), and a storage element (8) connected to the terminals of the photovoltaic cell, and at least three cell switchs (113), so as to be able to dispose the said two cells (111) in series or in parallel.

Polymer-based selective radiative cooling structures are provided which include a selectively emissive layer of a polymer or a polymer matrix composite material. Exemplary selective radiative cooling structures are in the form of a sheet, film or coating. Also provided are methods for removing heat from a body by selective thermal radiation using polymer-based selective radiative cooling structures, and a cold collection system comprising a plurality of the polymer-based selective radiative cooling structures.

A solar powered cooler assembly includes track drive that is drivable over a support surface. The track drive includes a pair of tracks that is each drivable in a forward direction or a rearward direction. Each of the tracks is drivable independently of one another for steering the track drive and facilitating the track drive to have a zero turning radius. A cooler is mounted to the track drive for transporting the cooler over the support surface. A personal electronic device is in wireless communication with the track drive for remotely controlling the track drive. In this way the personal electronic device facilitates the user to drive the track drive.