UniPiHAB03 was launched at 12:15 on Saturday, March 20, from Lajatico (PI). The balloon lifted a payload of 4 kg up to 33750 m in the stratosphere. Experiments onboard included a custom-built solar power system with terrestrial photovoltaic cells, a telemetry system based on LoRa, and inertial sensors for determination of attitude and acceleration of the payload gondola. Later in the day, the experimental package was retrieved in good conditions in a mountain zone close to Cortona, at the border between Tuscany and Umbria.