Solar panel heater now is popular is well known to European countries. The flat-panel solar water heater basically does not consume energy, has high energy efficiency, good economy and small space. The collector is installed on the outside of the balcony and can be installed on the inside of the balcony, which greatly saves the space of the bathroom. This split-type hot water project is on the upper floor. The application of buildings and villas has solved the problem that the high-rise cannot install flat-panel solar water heaters.