Abstract: An insulation device arranged to be fixed on an electrical board of an optical wireless communication equipment, and including an enclosure having a height at least equal to a height of an optical assembly including an optical concentrator, the enclosure including in its thickness an opaque material, the insulation device including at least one housing, the insulation device being arranged such that, when the insulation device and the optical assembly are mounted on the electrical board, the enclosure surrounds the receiving surface so as to insulate the optical assembly from unwanted optical signals, and the optical concentrator is positioned in the housing so that the housing assists in holding the optical concentrator in position in the optical wireless communication equipment.

Abstract: A system includes a first photovoltaic sub-module connected with a second photovoltaic sub-module. A first differential power processing converter connects with the first photovoltaic submodule and the second photovoltaic sub-module, and a third photovoltaic sub-module connects with the second photovoltaic sub-module and the first differential power processing converter. A second differential power processing converter connects with the first differential power processing converter, the first photovoltaic sub-module, the second photovoltaic sub-module and the third photovoltaic sub-module, where the second differential power processing converter communicates with the first differential power processing converter to exchange an information about determined perturbation of the first differential power processing converter and the second differential power processing converter.