Net metering is a billing mechanism that credits solar energy system owners for the electricity they add to the grid. For example, if a residential customer has a PV system on their roof, it may generate more electricity than the home uses during daylight hours. If the home is net-metered, the electricity meter will run backwards to provide a credit against what electricity is consumed at night or other periods when the home's electricity use exceeds the system's output. Customers are only billed for their "net" energy use. On average, only 20-40% of a solar energy system’s output ever goes into the grid, and this exported solar electricity serves nearby customers’ loads.
Net Accounting, where a consumer will get paid in money if their solar-generated power is greater than what is consumed from the grid. The tariff is set at Rs22 per unit (1 kilo Watt hour) for the first seven years and Rs15.50 thereafter.
You will have to pay the necessary bill if you consume more than you generate.
Net Plus, where there is no link between how much electricity the consumer uses from the grid for which billing will happen and how much solar-generated electricity is supplied to the grid which will be paid in full at the rate of 22 rupees per unit.