The photovoltaic facade

The photovoltaic facade of the MNACTEC, located in the open air, comprises an innovative system converting solar radiation energy into electrical energy thanks to the photovoltaic effect. The electricity generated, which is renewable and does not involve any type of pollution, is made available to users by means of a connection to the electricity grid. The innovation lies in the coloured photovoltaic cells.

Installed on the outer facade, the system integrates within the urban landscape and opens up a world of possibilities for urban architecture and for the implementation of new energy technologies.

The facade is made up of different structures known as solar panels. Each panel contains a grouping of photovoltaic cells. It is in the photovoltaic cell that the electric current is generated as follows:

• The photons of light (containing energy) push the electrons of the cell, giving rise to a potential difference (or voltage) in different parts of the cell, thereby inducing a continuous electric current.
• The cells are grouped together within a panel, which serves to combine the currents and voltages generated in each cell
• The panels are grouped into systems. Each system is connected to an undulator, which transforms the continuous electrical current into an alternating current and standardises the voltage at 230 V to connect the current to the Museum's electrical system.

The system has a peak power rating of 39.7 kwp, and generates some 42 MWh per year.