The HEU project OpenMod4Africa aims to develop an open energy system modelling toolbox for Africa, the OM4A toolbox. OpenMod4Africa applies the toolbox on two large regions, the Western and the Eastern Africa. This hop on project expands the scope from the two regions and enhances the project's reach to the Northern Africa region by, incorporating Tunisia as a real-world case for the toolbox. Main objectives are: 1. Improve the robustness and relevance of the OM4A toolbox. 2: Enhance energy system modelling capacity among Tunisian researchers and academia in general and about the OM4A toolbox in particular. 3: Provide new knowledge about possible alternatives for development of the Tunisian energy system towards a cost-efficient, secure and low carbon future including possibilities for export of green energy to Europe by applying the OM4A toolbox. 4: Actively involve Tunisian politicians and decision makers in development of the pathways for the Tunisian energy system. 5: Contribute to develop the African energy system modelling community - the OpenMod4Africa's Permanent Network 6: Pave the way for a wider use of the results in the North African region by developing replication strategies. The project will pave the way for a scientific, holistic, and robust approach to planning and developing the future energy and power system in Tunisia in and beyond the project. The project involves various stakeholders, including government entities to create a unified strategy for energy planning. This multi-sectoral collaboration enhances the likelihood of effective implementation and continuous updates to energy plans. The new OpenMod4Africa partner, Ecole Nationale d’Ingénieurs de Monastir (ENIM) from Tunisia, will gain experience in EU research projects and develop network with African and European academic groups which will support future project development and collaboration. The HopOn project will last for the 18 last months of the OpenMod4Africa project period.