On – grid/Grid – tie PV systems
A grid connected PV system is one where the photovoltaic panels or array are connected to the utility grid through a power inverter unit allowing them to operate in parallel with the electric utility grid.
In other words, homes and buildings that use a grid connected PV system can use a portion or all of their energy needs with solar energy, and still use power from the normal electrical mains grid during the night or on cloudy dull and rainy days, giving the best of both worlds.
Components of a grid tie system
o Solar module, array
o Inverter
o Load (e.g. lamp, fan, pump)
o Electrical accessories (e.g.
o switches, sockets, cables, etc.)
o Electric utility grid
The main advantage of a grid connected PV system is its simplicity, relatively low operating and maintenance costs as well as reduced electricity bills