Nowadays, we can see that the demand for energy increasing rapidly. To fulfill this demand we need to produce more and more energy. As compared to conventional energy sources we can use non-conventional energy sources which are a noiseless operation, easily available and pollution free for our environment. We can see the solar energy has a great potential to meet the energy demand acting as a standalone system or grid-connected mode, but the main problems with the solar system are irradiation level and temperature condition fluctuation and synchronization of AC power with the grid. In this project we can try to solve this problem by using MPPT for improving the efficiency, we should get maximum output under varying conditions which can be tracked continuously by a special technique called maximum power point tracking. In this project, we can make a MATLAB simulation of the solar PV system, along with i-v and p-v curves. Simulation of P&O algorithm with converters which is carried out with a grid-connected solar PV system and get maximum output under varying conditions.