Net metering is a billing mechanism which allows you to sell excess (unconsumed) solar power generated by your solar system to the DISCOM. For example, if on a given day you generated 20 units from your solar system and consumed only 18 units, the balance 2 units will be sold to the DSICOM at a set tariff. This ensures that you maximize your savings from solar. Click here for more information.
The mechanism of net-metering can be availed only if your building mains is connected to the grid. Therefore it can only be installed with on-grid and hybrid solar systems. The availability of net-metering varies from state to state and depends on the solar policy of your state. For example, in the state of Rajasthan, the net-metering is only available to power consumers going solar under the residential category. For commercial and industrial consumers of the state the facility is available only above a certain sanctioned load.