The inverter follows the grid voltage, frequency and phase, converting solar DC into synchronized AC.
Solar power supplies local loads first, reducing the electricity purchased from the grid.
When solar generation exceeds demand, surplus power flows to the grid:
When solar generation falls to 3 kW and the load needs 5 kW, the grid supplies the remaining 2 kW.
If the grid fails, anti-islanding protection stops the inverter output. Sunlight alone cannot keep the loads running.
No battery required. Cannot form an independent grid; grid outage means shutdown.