Decoupling the Monitoring of Solar Water Heaters and their Usage Profiles

South Africa is the most technologically advanced nation in Africa. However, country plagued with constant load shedding. The receives about 2500 sunshine hours annually, daily average irradiation levels of 4.5–6.5 kWh/m2. Despite these potentials, use electricity for domestic water heating still prevalent country. mass rollout solar (SWH) technologies low-cost housing sector across were met massive failures. This study aims to assess energy yield a passive flat plate and an evacuated tube system by evaluating performance systems address crisis (FP) (ET) monitored four days, characterised varying sky conditions through instantaneous data measurement at 5 s. parameters measured temperature, ambient irradiance plane array, relative humidity, wind speed direction. results obtained show that maximum 1050 W/m2 was on clear day corresponded hot temperature 58 °C 65 FP ET, respectively. cloudy 400 produced 22 29 this will guide stakeholders renewable towards employing SWH replace or augment electric geyser. Solar heaters can be used provide water. Hence, assessments offer essential information deployment reduce demand ailing African utility, Eskom, mitigate climate change.