Solar cells have a complex relationship between solar irradiation, temperature and total resistance that produces a non-linear output efficiency which can be analyzed based on the I-V curve.

MPP Chart Maximum power point tracking (MPPT) is a technique that grid connected inverters, solar battery chargers use to get the maximum possible power from solar (PV) panels. It is the purpose of the MPPT system to sample the output of the cells and apply the proper resistance (load) to obtain maximum power for any given environmental conditions. MPPT devices are typically integrated into an inverter.