Are photovoltaic cells environmental friendly?
The photovoltaic (PV) process converts sunlight – the most abundant renewable energy source on the planet – directly into electricity. he electricity is generated with no emissions and no noise. The basic power-generating element is a photovoltaic module. Modules are made out of photovoltaic cells. A photovoltaic cell consists of semiconducting material, most commonly silicon. When the cell is exposed to light, electrical charges are generated and this can be conducted away by metal contacts as direct current (d.c.). The electrical output from a single cell is small (around 0,6 V d.c.), therefore multiple cells are connected together to provide a more useful output. Photovoltaic cells connected in this way are encapsulated (usually behind glass) to form a weatherproof photovoltaic module. Multiple photovoltaic modules can likewise be connected together (then called a photovoltaic array) in order to provide sufficient power for common electrical uses. PV systems generate zero air and no
