What are the advantages and disadvantages of centralized solar heat collection system and household heat storage system in Muge in Four Seasons?

"Advantages: 1, each household uses the hot water and auxiliary energy in its own water tank, and there is no charge problem; 2, the enjoyment of solar thermal energy resources can be realized without the limitation of floor height; 3. During the operation, there is no charge management problem; 4. There is only one system, which runs reliably and has a low maintenance rate upstairs. Property can be responsible for the maintenance and management of floor solar energy; 5. It can be flexibly laid out according to the building conditions of floors, and it is the easiest to achieve coordination with buildings; 6. The heat collection system is centrally placed on the roof, and each household's water storage tank is placed in a convenient location indoors. Disadvantages: 1 In order to be convenient, safe and reliable, a pressure-bearing heat storage tank with electric heating function should be adopted. Therefore, the cost of water tank is high, resulting in higher system cost. 2. The electric control system should be specially designed to avoid the phenomenon of thermal mixing between households due to different temperatures of water storage tanks. "