10KW On-grid system is mainly used for users who want to sell electricity to the government. There has to be existing grid network. There is no need of battery bank for this system. All the electricity generated from the wind turbine or solar panel shall be transmitted to the grid network directly. And the power consumed by the loads shall be supplied by the grid. For this solution, it’s not technically feasible to realize that the electricity from wind turbine or solar panel supply to the loads first, and the extra power be transmitted to the grid then. There shall be a bi-directional electric meter installed in the system to record the power which the system output to the grid and the power which the grid supplies to the loads.