On-grid system is designed for customers who use electricity from PLN. On-grid system can send excess power generated back to the grid when the solar cells produce excess power, creating a surplus that can be used later. In this system, the received heat will be converted into direct current (DC) and converted by an inverter into alternating current (AC), which will then be synchronized with the electricity from PLN. This system only generates power when there is a PLN grid.

This system is considered the simplest and most cost-effective in installation.