How Hot Water Solar Panels Work

The Hot water solar panels work on temperature sensor readings, solar panels, flexi pipework and a solar station incorporating a solar pump, a pressure vessel and pressure gauge.

When the collector becomes 4°C hotter than the bottom of the water cylinder, the solar pump will then start. This pumps the Glycol through the flexi pipework into the water cylinder, heating it up. When the system cools down the solar pump will go in standby mode. The cycle is then repeated once the collector temperature becomes 4ºc hotter than the water in the cylinder. This process helps to preserve energy as the system is only active when the collector temperature will increase the water temperature.

Dependant on weather conditions during summer months, you may hear the pump turn on in the late evening. This is perfectly normal! All that is happening is that the collector has cooled to 127°C and your storage tank is calling for heat. The pump starts to displace the heat from the collector into the cylinder.

The average system pressure is set during installation to 1.5 Bar. As the system heats up the pressure rises and as it cools down the pressure drops.

The maximum pressure is 6.0 Bar and at this point the safety valve on the collector will let the steam out until the pressure drops below 6.0 Bar.

The minimum pressure is 0.5 Bar.

So, if you have been thinking about helping the environment and reducing your yearly fuel costs then solar energy could be what your looking for.

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