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Most people compare energy costs in South Africa by the price of electricity units, litres of diesel, or kilograms of LPG gas.
Unfortunately, this approach overlooks some of the biggest expenses businesses and households incur, namely downtime, equipment maintenance, supply reliability, operational risk, productivity losses, and inflation exposure.
Citizens shouldn’t be asking which energy source is cheapest, but which costs the least to run over time while keeping operations running smoothly.
Energy costs extend far beyond the price listed on a bill or fuel receipt. In fact, there are three separate cost categories to consider:
The upshot here is that energy decisions should be based on Total Cost of Ownership (TCO), not fuel price alone.
Framing energy choices as infrastructure models rather than fuel types provides a more practical basis for decision-making. These are the three models South Africans should reference.
South Africans are no strangers to energy disruptions.
In 2023 alone, rotational load-shedding cost the country an eye-watering R2.8 million.
The ramifications for businesses are huge. A restaurant may lose meal service and customer revenue during an outage. A workshop might experience reduced production and missed deadlines. Healthcare facilities can face operational disruptions.
These examples highlight an important reality: energy reliability influences revenue, productivity, and service quality.
Relying entirely on electricity can leave organisations vulnerable to outages and tariff increases, while diesel dependence exposes businesses and households to fuel price volatility and ongoing maintenance obligations.
Both approaches place critical operations at risk.
Many businesses now take the view that energy diversification reduces risk.
Using an alternative energy source or perhaps several allows operations to continue even when one supply pathway is disrupted, improving resilience and operational flexibility.
It stands to reason that different industries have different energy demands.
Commercial kitchens typically require consistent, high-heat output. LPG is frequently favoured because it delivers reliable performance and reduces exposure to electrical disruptions.
LPG heaters offer efficient heat output, especially when used in specific areas.
In many instances, LPG reduces operating costs compared to electric geysers, particularly during periods of high electricity tariffs.
LPG often delivers heat more efficiently and can be cost-effective for households cooking frequently.
Diesel remains valuable in several scenarios.
It is a quality energy source for emergency backup power, remote operations without reliable grid access, and temporary energy requirements on construction or project sites.
The future is unlikely to be electricity only, diesel only, or LPG only.
Instead, resilient energy systems are increasingly combining multiple sources to improve reliability, control costs, and reduce operational risk. Businesses and households are moving towards integrated energy strategies that prioritise continuity and flexibility.
Instead of asking, “Which energy source is cheapest?”, consider which energy source provides the lowest total operational cost while reducing risk.
For many South African homes and businesses, the answer increasingly involves a combination of grid electricity, diesel backup where appropriate, and LPG for high-heat, high-consumption applications.
By evaluating total cost of ownership rather than fuel price alone, decision-makers can build energy systems that support long-term efficiency.
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