If it's the middle of winter and your roof is freezing cold, the last you thing you want is to transfer freezing cold water into your hot water tank! So there is also generally a control system attached to a solar-thermal panel with a valve that can switch off the water circuit in cold weather.
A typical control system may incorporate some or all of the following: a pump, flowmeter, pressure gauge, thermometer (so you can see how hot the water is), and thermostat (to switch off the pump if the water gets too hot).
Zhejiang Uniepu New Energy Co ltd is an integrated enterprise professional working on the renewable energy and new material products' development production and sales since 2009. Our products including solar hot water, solar water heater, solar thermal, solar photovoltaic system for house and solar accessories.
We have been sold worldwide, especially to India, Poland, where we have over 10 years experience , and in Mexico, Chile, Brazil, where over 5 years experience, also we have achieved greater market share in European and South America. We welcome to receive all the inquires.
