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Solar Water Heaters Overheat

Overheating of certain solar water heating designs is a growing concern in the industry. Dangerously high water temperatures, even boiling can be achieved with the associated risks of injury. Such system designs rely on a passive principle known as thermosyphon to enable heated water to naturally rise into a storage vessel. These are the systems that...
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NERSA consultation paper discusses revision of rebate rules

How long will the current Eskom scheme last?

The National Energy Regulator of SA (NERSA) has published a consultation paper on the revision of regulatory rules for energy efficiency and demand-side management (EEDSM). http://www.nersa.org.za/Admin/Document/Editor/file/Electricity/Electricity%20Infrastructure%20Planning/EEDSM%20Consulatation%20paper%20including%20the%20rules.zip If it goes ahead it could potentially replace the current Solar Water Heating rebate scheme being run by Eskom Whilst little is known for...
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Anomalies of Efficiency

Certain SWH systems apparently demonstrate over 100% efficiency!

This of course is clearly not possible and can only come about as a result of an error in measurement or calculation however, there are certain products on the Eskom subsidy scheme which are listed with subsidy values and therefore Q factor measurements, which appear to have been...
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