The activities of the **summer training program** for engineering college students continued at the **Future Center for Energy Research**, where the **second lecture** was held under the title: **"Inverter and Battery Capacities and Their Role in Solar Systems."** 🛠 The lecture was delivered by **Engineer Israa Mohammed Hassan** and **Engineer Mohammed Faleh Hadi**, who provided a detailed explanation of the types of inverters used in solar energy systems and the mechanism for selecting the appropriate capacity according to the nature of electrical loads. They clarified the difference between single-phase and three-phase systems (1-phase and 3-phase), and the specifications of each type in terms of efficiency and durability. The lecture also extensively covered the types of solar batteries (Lithium, Gel, AGM), explaining concepts such as battery capacity, number of cycles, optimal charging and discharging methods, in addition to the key technical standards that must be observed to achieve the best system performance. 💡 The lecture was marked by strong student interaction, with many important questions raised about charging issues, determining daily consumption, and how to extend the lifespan of both batteries and inverters. These lectures come as part of the Al-Mustaqbal Center s goals to **link academic education with practical application**, and to **prepare a generation of engineers capable of advancing the renewable energy sector in Iraq