A grid connected system is connected to a large independent grid (typically the public electricity grid) and feeds power into the grid. This is a form of decentralized electricity generation. In the case of residential or building mounted grid connected PV systems, the electricity demand of the building is met by the PV system. Only the excess is fed in to the grid when there is an excess. The feeding of electricity into the grid requires the transformation of DC into AC by a special, grid - controlled inverter.
A Grid Tie inverter or a (GTI) is a special type of Inverter (electrical) that is used in a renewable energy power system to convert direct current into alternating current and feed it into the utility grid. The technical name for a grid-tie inverter is”grid-interactive inverter”. They may also be called synchronous inverters. Grid - interactive inverters typically cannot be used in standalone applications where utility power is not available.
