TY - JOUR N2 - Solar collectors are used increasingly in single-family housing. Their popularity depends on many factors, including the price-to-productivity ratio, which in turn results from the development of solar collector technology as well as entire systems. This development consists of many aspects, including those related to the modernization of control systems and measuring of solar collector systems. Currently used systems offer, among others, the ability to determine the approximate solar heat gains using the sensors necessary for normal control of the sensor system. The paper analyzes, on the example of one facility, how such installations work in Polish conditions. An installation consisting of 3 solar collectors has been selected for analysis, supporting the preparation of hot utility water for a single-family residential building. The detailed analysis concerned days with high heat gains compared to the average heat demand for hot water preparation in the building. The temperature verification method (TVM) of the calculated solar heat gains by the solar system controller has been proposed. Then, differences in measurements according to two methods (controller and TVM) have been presented at various characteristic moments of the installation’s operation (start- -up, stop) and during continuous operation. It has been shown that during the day gains measured by the controller can be 15% lower than gains measured by the TVM method. The check has been carried out at a daily sunlight value higher than 4.8 kWh/m2 measured on a horizontal plane. The ratio of heat energy supplied to the domestic hot water storage tank to the measured insolation has been 34%. The sum of annual solar heat gains measured by the controller and TVM differed by 5.2%. L1 - http://journals.pan.pl/Content/119551/PDF-MASTER/07-Olczak.pdf L2 - http://journals.pan.pl/Content/119551 PY - 2021 IS - No 1 EP - 132 KW - measurement KW - solar energy KW - solar heat sources KW - energy efficiency measures KW - thermal solar collector A1 - Olczak, Piotr PB - Instytut Gospodarki Surowcami Mineralnymi i Energią PAN VL - vol. 24 DA - 2021.03.30 T1 - Temperature verification method of solar heat gains in installations with flat plate solar collectors – case study SP - 115 UR - http://journals.pan.pl/dlibra/publication/edition/119551 T2 - Polityka Energetyczna - Energy Policy Journal ER -