Different hybrid systems will be researched and modeled and optimal mobile and stationary solutions will be sought. For mobile solutions (Vehicles and vessels) MUI will be taken in combination with solar, batteries and fuel cells, and for stationary solutions wind and solar power plants in combination with batteries and fuel cells. For diagnostics and optimization, models will be created and CFD modeling will be applied, and experiments will be performed with the available equipment. Thermodynamic analyzes of the working process of internal combustion engines with alternative fuels will be performed using numerical methods. Expert systems for diagnosis and optimization of hybrid energy systems in real time will be created. The state of hybrid energy systems will be analyzed by the expert system and suggestions will be made to increase the efficiency and reliability of the system. Calculations of system parameters will be performed with reference to standard conditions, parameter monitoring and generation of reports and trend diagrams, as well as optimization of engine operation based on real-time simulations and thermodynamic analyzes of the work process. Digital twins of the ship’s propulsion systems will be developed. The influence of external factors on the performance of fuel articles when used in ship power systems will be analyzed. Systems for remote monitoring and optimization of hybrid energy systems will be developed. Methods of testing energy systems in a virtual environment will be developed.