It seems like you're referring to "On-Grid Solar System." An on-grid solar system, also known as a grid-tied or grid-connected system, is a solar power generation system that is connected to the utility grid. Here's a brief explanation:
Definition:An on-grid solar system is designed to work in conjunction with the local utility grid. It allows solar-generated electricity to be used on-site while also allowing excess electricity to be fed back into the grid.
How it Works: