Use system of family-splitting plug-in card for solar energy centralized hot-water

The invention discloses a use system of family-splitting plug-in card for solar energy centralized hot-water, which is characterized in that a solar energy water heater set is arranged on a top floor, wherein the solar energy water heater set is composed of a plurality of solar energy water heaters which are in series firstly and then in parallel; a first solar energy water heater in the first row of the water heater set is connected with a water temperature and water level controller; the discharging tube of the solar energy water heater set is connected with a heat preservation storage water tank by a solenoid valve and the discharging tube of the heat preservation storage water tank is connected with a hot-water tube in a user house by a pipeline circulation blower pump with a temperature difference controller, the hot-water tube is connected with a hot-water outlet by a magnetic card meter and the tail end of the hot-water tube is connected to the heat preservation storage water tank by a host return water pipe; and the heat preservation storage water tank is provided with an electric heating compensating gear and a controller thereof. The system performs centralized lighting for heating the water on the top floor, thereby being capable of conducting complementary use and integrally heating the water; the pipelines are connected out from the heat preservation storage watertank, the number of the pipelines connected out from the heat preservation storage water tank is less than that of the pipeline which individually are connected out from the solar energy water heaterand the cold water in the pipeline is less, thereby reducing waste. The invention can be switched on immediately once a card is swiped, has the advantages of exact mensuration, billing in accordance with amount, fairness and justifiableness, and boosts hot-water saving.