Photovoltaic solar panels

Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials  that exhibit the photovoltaic effect , a phenomenon studied in  physics ,  photochemistry , and  electrochemistry .

PV has become the cheapest source of electrical power in regions with a high potential.

Panel prices have dropped by the factor of 10 within a decade. This competitiveness opens the path to a global transition to  sustainable energy  which would be required help to mitigate  global warming .

A  photovoltaic system  employs  solar modules , each comprising a number of  solar cells , which generate electrical power. PV installations may be ground-mounted, rooftop mounted, wall mounted or floating. The mount may be fixed or use a  solar tracker  to follow the sun across the sky.

Solar PV has specific advantages as an energy source: once installed, its operation generates no pollution and no  greenhouse gas emissions , it shows simple scalability in respect of power needs and silicon has large availability in the Earth’s crust.