What is the installation position requirement of PV water heater

In order to maximize the power of solar energy in the worst season, the installation angle of photovoltaic panels should be perpendicular to the sun at noon in winter. The hot water storage tank can be installed in toilet, kitchen, enclosed balcony, garage, staircase corner, storage room, attic, basement and even living room. However, if the heating system is needed, it needs to be installed according to the practicability of the house.