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Inverter |
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Photovoltaic Cells When light strikes photovoltaic cells, (PV), the energy of the photons is absorbed and drives electrons to form an electrical current. Many of these cells are connected together and made into panels. These panels are then mounted on roofs, (or any other structure) and wired into “strings” which are combined to form a large array. |
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Inverter The output of the array is direct-current, (DC), which an inverter converts into a stable alternating-current, (AC). The output of the inverter is connected your electrical panel and supplies your electrical power. |
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PV panel |
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Grid-tied If, at any moment, your electrical demand is greater than can be provided by your PV system the Utility Grid will supply the balance. At other times you may have excess solar power. This energy is used by your neighbors because it flows back into the utility grid, actually turning your meter backwards! |
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Net Metering You get to recover this “stored” energy when your meter runs forward again when your demand is greater than your generation. This is called “net metering”. |
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Existing AC Panel |
