(Re posted from April 2010) One of the biggest problems the consumer in South Africa has is knowing which Solar Water Heater to select. In spite of the fact that there are now a great many systems available on the Eskom subsidy list to choose from, it is difficult to separate the good from the ugly, since...Read more
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Thermosyphon vs. Active Circulation. The most common image one has of a solar heater is of a roof tank with a flat plate collector positioned beneath it in what is known as a close-coupled configuration. This is the most common configuration. Known as thermosyphon, it relies on the fact that hot water rises. Whilst this is the...Read more
Retrofit to existing or complete replacement Solar geysers for which you pay a premium are required to have a better standing loss performance than a standard geyser. The SABS spec states that a 200L Solar geyser must achieve 2.26 kWh or better. That’s only 0.04kWh better than a popular brand of standard geyser. A good argument in...Read more
Cost per kilowatt-hour(for the capital cost of the system)The true cost of the system. Using the Eskom web site as the source of data. Indicated installed pricing for solar water heater varies from R22, 700 down to R14, 900. The Q factor explained earlier is used by Eskom to determine the value of the subsidy for which...Read more
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