Rooftop solar panels convert energy from coming from sun into electric energy, Direct Current (DC), which is sent to inverter.
The inverter then converts DC it into Alternating Current (AC) because it is not possible to use DC directly – all our electronics need AC supply. Grid-tie inverter also regulates the voltage. The PV cells may make excessive DC but that can’t be fed into your main supply as it may be too much to handle. Inverter regulates the voltage of DC that it gives to the main supply.
Inverter converts DC into usable AC and feeds this to the main supply.
Now that it is in your main supply, any electrical appliance can be plugged in to enjoy free, clean and green solar energy.
When solar power is being converted into AC electricity and powering connected load, the electricity meter stops – meaning you don't take anything from the electricity company. If there is a surplus of solar power after running all the load, it can be fed back to the grid for a price of Rs. 6-9 per unit depending on the net metering policy of the state.
In the absence of solar such as in the evening or when there are thick clouds, the grid-tie inverter runs the load through main grid supply.