A simulation with TRNSYS of an individual solar water heater for the hot water needs of an average family in Algeria was made; three cities of different climates were chosen to the north on the coast. in the highlands and in a desert region. the solar water heater consists of a flat panel of 4m² and a storage tank of 300 liters. a back-up electrical energy is activated when solar radi... https://unitedssports.shop/product-category/soccer-field-equipment-goals/