Solar Heating

How does a solar thermal system work?

A solar thermal system consists of a number of components; a solar collector, a pump, a controller and a hot water storage tank.

The solar collector, located on the roof, collects the sun’s energy and transfers the heat to the storage tank. The storage tank allows the hot water to be stored until it is used at night or in the morning.

Solar geysers can be divided into two primary types:

  • Direct systems that pump water into solar panels, which is then heated and stored in the geyser. They can use either solar panels or evacuated tubes.
  • Indirect systems use a specially designed type of anti-freeze, which circulates through solar panels to heat the water, which then flows to a geyser. They also operate with solar flat plate or evacuated tubes.


Low Pressure systems are designed to use gravitational pressure from the water level in or above the tank. (or on a farm dam).

low pressure solar water geyser is classified as a “NO” pressure solarwatergeyser. … All and all the difference between a “NO and “HIGH” pressure solar watergeyser is that the “0” pressure system cannot handle pressure at all and the high pressure system can handle high pressure.


The GeyserRobot is a smart switch which turns any standard geyser and element into a solar geyser using PV solar panels. The PV solar panels are directly connected to the GeyserRobot which directs it to the geyser element. The GeyserRobot comes standard with a digital display and thermometer which replaces the geyser thermostat. This full automation of your heated water needs. Whenever the geyser water has obtained the pre-set temperature on the thermostat, the GeyserRobot will switch off the geyser element.

At any time, the geyser could be switched back to grid power when insufficient heating is obtained from the sun (in case of cloudiness or increase usage of hot water from the geyser). In this case, the element and thermostat will function as normal.