Net metering applies to photovoltaic (PV) systems installed within industrial, commercial, agricultural units or public buildings. It must have the following requirements : 

• The PV system must be installed within the premises or in a plot directly adjacent to the premises;
• The PV system’s capacity cannot exceed 80% of the approved electrical load of the premises and the total electricity production of the PV system cannot exceed the total electricity consumption (historically) of the premises;
• The production from the PV system is first used to offset the consumption of the premises and any excess production is exported to the grid;
• Two electricity meters are installed in the premises: An electricity import/export meter from/to the grid and a meter measuring the PV system production. Meter readings are taken at 20-minute intervals;
• In the event that the revenue from exported energy exceeds the cost of consumed electricity in a given month, then the surplus is credited and carried forward to the next billing period. Any accumulated surpluses are eliminated/lost every Oct/Nov;
• Net Billing contract duration of 10 years (renewable on terms existing at the time);
• Introduces ZERO risk of interruption of electricity supply.