Photovoltaic modules produce direct current (DC) electricity. This is convenient if the goal is to charge a battery for energy storage in an off-grid system, but our electrical grid and most of our day-to-day electrical devices operate on alternating current (AC) electricity. Therefore, in order to convert the DC electricity into AC electricity, a device called an inverter is installed as a part of the photovoltaic system.
Bonneville Environmental Foundation
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Portland OR 97201