In an On-grid solar system, the solar power is produced only when the grid is available. The power supply gets completely cut-off in case of the grid outage.On-Grid system is directly tied with main supply so our excessive production is fed to grid through net-metering facility and incase of low generation and excessive usage we can draw from grid. Customer’sbill is generated by total calculation of import and export units that are calculated by special bi-directional meter.