| 1 | General features of hybrid energy systems | [1]-[3] |
| 2 | Renewable energy sources (solar, wind, hydraulic, geothermal, hydrogen, etc.) | [1]-[3] |
| 3 | Conventional energy sources (coal, natural gas, oil and its derivatives, nuclear, biomass, etc.) | [1]-[3] |
| 4 | Hybrid power systems power potentials | [1]-[3] |
| 5 | Hybrid power systems | [1]-[3] |
| 6 | Hybrid systems with and without grid connection | [1]-[3] |
| 7 | Hybrid systems created with wind energy | [1]-[3] |
| 8 | Hybrid systems created with solar photovoltaics | [1]-[3] |
| 9 | Hybrid systems created with geothermal energy | [1]-[3] |
| 10 | Hybrid systems created with biomass and biogas energy | [1]-[3] |
| 11 | Hybrid systems created with wave and nuclear energy | [1]-[3] |
| 12 | Hybrid system application example and technological developments | [1]-[3] |
| 13 | General topic review | |