Don't install a solar water heater if you don't understand its engineering, particularly its dangers and maintenance requirements.
Water heaters can be problematic in hot weather. When a solar panel sits in the direct sun long enough, the water can sometimes get to over the boiling point. Solar panels have been known to rupture from steam pressure, which can burn (not to mention cost a lot to fix). Or the pipes can fill with superheated water and burst inside your house.
Always keep children away from solar water heating systems and the associated pipes. Also, add some safety measures to your valves. Most solar water heaters have valves for controlling flows and evacuating equipment for various reasons, such as performing maintenance or keeping water from freezing in the pipes in cold weather. Children love to play with valves, so buy valves with padlock loops to prevent children from reaching up and twisting a valve with superheated water.
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