Labtronic offers LT-REE560, a comprehensive training system that explores the principles of solar thermal domestic water heating using flat collectors. These collectors, widely utilized for non-concentrating solar energy collection, feature selectively coated metal sheets with efficient heat conduction. The system replicates real-world applications, converting radiant energy into heat within a commercially available flat collector. The heat is then transferred to a heat transfer fluid in the solar circuit and further into the hot water circuit through a heat exchanger. Controlled by a solar controller, the system includes pumps for both circuits and safeguards like an expansion tank and safety valve. The trainer facilitates practical experiments, measuring temperatures at various points and flow rates in the solar circuit. The system can be operated with solar radiation or the Artificial light source to ensure ample illuminance.