Обогрев, Охлаждение, Вентиляция / Системы Обогрева Запросы

I want to make inquiries about solar water heating systems.

I am interested in solar water heaters, specifically the split systems with electrical backup heaters.

Would you please send me details of solar water heaters of 300 to 500 liters size and its component? Does it need circulation pump and return pipe from last point of water line?