• What are photovoltaic cells?
• How do they work?
• What can photovoltaic cells make work?
• Are photovoltaic cells difficult to use?
• What are the envoronmental effects they produce?
• Can photovoltaic systems be used to warm pools or water for domestic use?
• Do photovoltaic modules work in cold environments?
• Do they work in cloudy days? What happens in enclosed places?
• Apart from the modules, what else does the photovoltaic system needs?
• How long will the photovoltaic system last for? Do they lose power with time?
• Can they break up? Don't they contain glass?

APART FROM THE MODULES, WHAT ELSE DOES THE PHOTOVOLTAIC SYSTEM NEEDS?

Even though a photovoltaic system can be as simple as a module as a charge (as a fan works), the majority of the photovoltaic systems are designed to supply energy every time it is needed. Consequently, these systems must include batteries to keep the energy generated by the modules. Battery-based systems also require electronic devices to control the charge and to limit the discharge. Because the modules and the batteries are direct current devices, bigger systems sometimes include CC/CA electronic inverters to supply alternating current with the ordinary tension and frequency used in houses or factories. This allows the use of normal household appliances; otherwise, special CC devices should be used (generally in vehicle or maritime industries). From the elctric point of view, protector devices such as diodes, fuses, circuit breakers, and security switches, which should be down to earth to apply with the security code of electric rules, are required. In general, photovoltaic systems also require ironwork assemblage to support and carry the modules; and wires to connect to other components.