Abstract
Solar cells’ current - voltage (I-V) characteristic is affected by the weather irradiance. To obtain the maximum power output of solar cells, the DC converter circuit with MPPT (Maximum Power Point Tracking) system was typically implemented between solar cells and load. This research proposed another kind of solar energy system that uses supercapacitor for power management.Supercapacitors use two operation modes, storing and compensating solar energy to control solar cells’operation point near maximum power point. The proposed system can improve solar cells output power efficiency especially at low irradiance.