Can a newly bought house, 10 floors, install a balcony solar water heater?

You should be remodeling the pipes inside the balcony, that's no problem, the medium is not in the pipes, so don't worry.

The newly bought house, a total of 10 floors, I have a 3-meter-long thin crack in the central floor of the living room on the 6th floor, and the crack is not visible to the naked eye on the bottom plate.

It was only in the afternoon that the sun would have come.

Wall-mounted, whether you need electric heating depends on your local climate. Of course, it is good, but it also costs electricity, so it is recommended to connect a small electric water heater.

See if you get into the water'Whether the water tank valve is opened, how many days without water in the water tank is not opened, and whether the solar heating panel connection line is connected'There is also whether the inlet and outlet water are reversed'There is also a possibility that the solar panels are damaged and cannot receive heat'It can't be passed into the tank'The water never gets hot.