The energy issue we are facing today, together with greenhouse gas emissions and climate change, is pushing toward the use of renewable technologies; among them solar energy is, to date, the most popular. However, the intermittency of renewable energy sources represents a significant issue to consider, leading to the necessity of accumulating and storing part of the energy produced. Therefore, this work reports the realization of an integrated energy harvesting and storage system made by a dye-sensitized solar cell (DSSC) and a supercapacitor (SC). The integrated system is realized with a three-electrodes stacked configuration in which a shared titanium current collector was coated on both sides by activated carbon and worked both as a counter electrode for the DSSC and as one of the electrodes of the SC.