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General information about Solar Water Heating

How does it work

General information about Solar Water Heating


Solar water heating is a system for heating water using energy from the sun. Solar energy is collected by a panel/collector, which is then connected by pipes to a hot water storage device such as a hot water cylinder.

Solar water heaters can help save water heating costs by reducing the amount of gas and electricity needs to heat water. By using sunlight to heat water instead of combustible sources or follies fuel-produced electricity, fewer pollutants are being introduced into the environment. Solar energy is not affected by the current shortage of electricity and does not stop providing hot water during load shedding.

The electrical geyser uses on average between 30 – 50 % of your household’s monthly electricity bill. Replacing your conventional geyser with a solar powered system will reduce that percentage of your electricity consumption by up to 70%.

The ideal temperature of your geyser or tank is between 55 and 60 ˚C. Most solar systems heat the water to between 60 – 80 ˚C, but some can heat much higher than that. You need to be aware of over-performing systems so that you are not scalded by the hot water.

Solar water tanks are better insulated than electrical geysers and can keep water hot for a longer period of time. This ensures that there is always a tank full of hot water in the evenings/mornings – provided the tank size is correct and the users do some planning.

A solar system has a lifespan of 5 to 20 years depending on the system and the maintenance on the system.

Soon all new buildings will have to be energy efficient by law. The legislation for new buildings has already been gazette.