Inverters and Grid-Tied Systems

A grid-tie inverter converts DC electricity into AC suitable for injecting into an electrical power grid, normally 120V RMS at 60Hz (USA) or 240V RMS at 50Hz (New Zealand). Grid-tie inverters are used between local electrical power generators: solar panel, wind turbine, hydro-electric, and the grid. In order to inject electrical power efficiently and safely into the grid, grid-tie inverters must accurately match the voltage and phase of the grid sine wave AC waveform. Some electricity companies will pay for electrical power that is injected into the grid.
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