The ETB-250 Solar Energy Trainer is a complete educational setup designed to demonstrate the fundamental principles and practical applications of solar photovoltaic energy conversion. It enables students to study the characteristics of solar panels, effect of light intensity, charging of batteries, and load performance. The trainer includes a high-efficiency solar panel, variable load, voltmeter/ammeter interface, and battery interface for real-time experimentation. It is ideal for institutions teaching renewable energy systems, green energy concepts, and electrical engineering fundamentals.