ON GRID SYSTEM
In grid tie system the DC power produced by the solar panel is combined through a DC combiner box and is then fed to the Grid Synchronous Inverter. The inverter in-turn will convert the available DC power into AC power and will feed it to the Bi-Directional meter. The Bi-Directional meter is special equipment that can measure the flow of AC current in both direction, unlike the regular EB meter which can measure the flow of current in only one direction.
The AC power generated from the Grid Tied inverter is used by all the house hold equipment. If excess power is generated than required then this power will flow into the utility grid through the Bi-Directional meter. In the Bi-Directional meter credit will be accumulated if power is exported and this can be adjusted with the monthly power consumption. Excess power can be carry forwarded to the next month and this credit can be accumulated for one year.