Our sun emits solar (electromagnetic) radiation, which we call sunlight. One and a half hour’s sunlight across the earth’s surface is enough to power the entire world’s energy consumption for a full year.
 

It is therefore very practical to harvest this free energy on your rooftop to power your household.
 

Solar panels (often called photovoltaic or PV panels in other countries) are waterproof and are usually arranged in groups, flat on your roof. They generate electrons when exposed to light. These electrons flow through a circuit and produce direct current (DC) electricity, which is stored in batteries or gets directly converted to alternating current (AC), by an inverter, for household use.
 

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