The energy transition relies heavily on energy management technology such as power electronics devices. These devices allow the control of electricity flows such as battery charging, motor control and renewable energy usage. This critical technology is mostly proprietary blocking innovation and knowledge transfer. The OwnTech project has the objective of creating an open-source technology suite similar to Raspberry Pi or Arduino for energy management. Our goal is to provide our community with the tools to act and re-imagine their energy system from the bottom up. In this talk we will introduce the OwnTech project, its mission and show a study case of a 1kW 24V micro-grid developed by Alyssia Dong, an assistant professor at the University of Angers, for educational purposes.