An average person uses 75 litres of water in a 24 hour cycle. Thus the amount of people X 75 gives you the correct size. Example 4 people X 75L = 300L

If you don’t use this formula to calculate the correct number of litres you need, you could fall short and then the electricity backup will kick in making up the shortfall. This will minimize the effect of the solar water heater and your return on investment.

If you struggle to know which system will be the best choice for you, contact us! We will help you find the best solar water heating system or geyser for your family!

determining the size of solar water heating system you will need