New Smart Geyser Controllers Could Cut Electricity Bills by 30% in SA Households
- Electric geysers consume up to 41% of a South African household's monthly electricity bill, making them the biggest power drain at home
- Smart geyser controllers go far beyond basic timers by learning water usage habits, detecting leaks, and syncing with solar panels and off-peak tariffs
- A locally available smart controller costs R849 upfront plus R149 a month, with potential savings of over R288 monthly for some households
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Source: Getty Images
Electric geysers are quietly draining South African wallets. Research shows they account for between 34% and 41% of the average Eskom Homepower 4 user's monthly electricity bill, with heating a standard 150-litre geyser costing anywhere from R801 to R961 per month on standard tariffs.
According to a report, many homeowners have turned to conventional geyser timers as a fix, but experts say these devices offer only marginal relief. The real opportunity lies in upgrading to a smart geyser controller, which can reduce water heating costs by 15% to 30%.
Timers vs smart controllers
The difference between a basic timer and a smart controller is significant. A mechanical timer simply cuts power at set intervals on a fixed clock schedule. A smart controller does considerably more: it tracks live water temperature, learns the household's usage patterns, adjusts heating schedules automatically, and can even integrate with solar panels to redirect excess energy towards water heating.
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Smart controllers also handle power outages more gracefully. While a conventional timer loses its schedule whenever the power goes out, a smart controller resynchronises automatically and adapts to whatever power is available. Safety features are built in too, with sensors that shut the system down if a leak, element failure, or dry burn is detected, potentially saving homeowners from costly plumbing repairs.
There is also a health benefit. By preventing water from sitting in the temperature range of 20°C to 45°C for extended periods, smart controllers reduce the risk of Legionella bacteria growth in the geyser.
What it costs
One prominent local option is Plentify's HotBot, priced at a once-off R849 with a R149 monthly subscription. For a household spending around R1,000 a month on water heating, estimated monthly savings range from R120.15 to R288.42.
The device is best suited to homes running electric or thermosyphon solar geysers, particularly those on time-of-use electricity tariffs, where the controller can automatically shift heating to cheaper off-peak hours.
Smaller households with lower hot water demand should factor in a longer payback period before the upfront and subscription costs are fully recovered.
Source: Getty Images
More on saving money and electricity in South Africa
- Briefly News recently reported that Cyril Ramaphosa credited the ANC for ending load shedding, but many South Africans questioned whether the party deserved praise for fixing the electricity crisis.
- A finance expert warned South Africans that buying certain household essentials cheaply could cost far more in the long run.
- A woman comparing the prices of identical products over 10 years left Mzansi stunned after revealing just how dramatically the cost of one popular chocolate had increased.
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Source: Briefly News
