A grid-tied electrical system, also called tied to grid or grid tie system, is a semi-autonomous electrical generation or grid energy storage system which links to the mains to feed excess capacity back to the local mains electrical grid. When insufficient electricity is generated, or the batteries are not fully charged, electricity drawn from the mains grid can make up the shortfall.
When batteries are used to store, the system is called battery-to-grid (B2G), which includes vehicle-to-grid (V2G).
Read more about Grid-tied Electrical System: How It Works, Quality of Service, Environmentally Friendly, Small Scale Start, Sell To and Buy From Mains, List of Countries or Regions That Legally Allow Grid-tied Electrical Systems
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