A grid-tie inverter is a solid-state switching circuit that converts a DC electrical source into AC with the ability to synchronise to utility grid achieveing high power factor and low harmonic distortion.
Inverters are either single-phase lower power units for residential use or three-phase systems for higher-power industrial & utility applications.
They are typically found in renewable energy systems for converting the DC sources of solar panels or small wind turbines, and power generation from batteries, other turbine generators and fuel-cells.
They are also used as active front-end rectifiers with unity power factor correction and the recovery of regenerative braking energy in motor drives.
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