1. What if there is no sun or if it’s raining?

The heat output of the solar geysers is reduced on overcast days, but it will still be able to provide heating. About a quarter of the sun’s energy gets through the clouds. Most solar geysers have a built-in electric heater that heats the water if there is not enough sun.

2. How much maintenance is required?

Most solar geysers don’t require any maintenance.

3. What is the life expectancy of a solar water heating system?

The life expectancy of a solar geyser system is between 20 and 30 years.

4. How long does it take for a solar geyser to pay for itself?

Because of the energy costs saved as well as the Eskom subsidies, a solar geyser will pay for itself in a few years.

5. How long will it take to install a solar geyser?

An average installation will take one day.

6. Is the solar geyser protected from frost?

It is possible to lower the temperature at which water freezes by mixing it with another substance. For example, the salt in seawater lowers the temperature by nearly 3ºC. That is why salt is sometimes spread on roads in colder climates to prevent the build up of ice. There are many anti-freeze substances. Among the most common is ethylene glycol, an additive used in automobile cooling systems. But most of these substances are not suitable for use in solar water heater systems as they are toxic. The design of a solar water heater system features a closed circuit collector that is filled with a non-replacing charge of fluid. ‘Collector Protector’ is a propylene glycol, non-toxic antifreeze additive used in solar water heater systems. By introducing ‘collector protector’ into the closed circuit, the fluid freezing point decreases to temperatures below 10ºC.

7. What are the basic requirements to install a solar water geyser?

You need to have enough roof space that is free from shade. The roof also needs to be strong enough to support the solar panels of the solar water geyser system.