The implementation of The European Green Deal is a modern driver of changes in the energy sector for transition to a clean economy and energy security. Access and sustained consumption of clean energy sources, reduction of greenhouse gas emissions and environmental pollution are important initiatives for overall socio-economic development. This all implies the need to develop models for the analysis the state of the energy system in real time as well as predict general energy consumption based on available open data and balance databases. In this manuscript, we investigate the importance of open data for energy security and the development of effective energy policy and institutional frameworks. Analysis of the electrical energy balance of Ukraine (the 2019 calendar year) on the base of the open data shows the existence of volatility between the production of electricity from renewable energy sources and its consumption, which may directly affect the country's security.