Understanding Solar Systems

Solar cells (usually made out of silicon) collect light and convert it into electricity. The electricity is in the form of a direct current (DC) that must be converted by an inverter into an alternating current (AC) before it can be used in a home or business.

An array of solar panels

An inverter

Switches and wiring

Several solar cells form a solar module. Several solar modules form a solar panel. An electrical unit made up of solar panels is called an array. There can be more than one array to an installation depending on the electric needs of the building.

A solar system with 120 square feet of panels generates 1,000 - 1,440 kWh of electricity per year. Electric generation is proportional to area. A solar system with twice the area would generate twice the electricity.

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Residential Solar System Install