·         Average household electricity consumption is 1200kWh per month

·         Average geyser consumes 30% to 50% of the total household consumption.

·         Expected geyser consumption is 30/100 X 1200 = 360kWh.

                                                50/100 X 1200 = 600kWh

·         Solar can save 80% of this consumption i.e. 80/100 X 360 = 288kWh (or 80/100 X 600 = 480kWh)                                           

·         Average electricity cost is 80c / kWh

·         Expected cost saving is 288 X R0.80 = R230.40 (or 600 X R0.80 = R480.00) per month.

·         This accumulates to R2764.80 (or R5760.00) per year.

·         According to Eskom there is an average of 330 days of sunshine days in RSA

·         This means an average annual saving of 330/365 X R2764.80 = R2499.68 (or R5207.67) per year.

·         Electricity prices are expected to rise in future which will make the pay back period on solar systems much shorter, thus more attractive.(Speculated up to R2.00/Kwh)

·         Over and above the electricity savings on the heating of water new high efficiency solar collectors can be used to collect heat for under floor heating making under floor heating an economical attractive heating option compared to conventional space heating.