There was a time when electricity was simply another overhead on the monthly expense sheet. Businesses budgeted for it, absorbed annual increases, and moved on, but this reality is changing quickly.
Over the past few years, electricity has changed from being a predictable utility cost to becoming one of the biggest long-term financial risks many South African businesses face. And I still don’t think enough companies fully appreciate where this is heading.
Most people focus on the latest tariff increase in isolation. An 8% increase here, another 10% there. However, the real issue is not a single increase but rather the compounding effect of continuous above-inflation electricity hikes, combined with a grid under growing operational and financial pressure.
When businesses start modelling what electricity could realistically cost over the next five to ten years, the numbers become uncomfortable very quickly, and this is before you even factor in the increasing reliance on diesel generation.
The diesel problem nobody wants to talk about
South Africa’s grid is becoming progressively costly to stabilise. Eskom is leaning harder on diesel-powered generation to support supply constraints – the cost of producing electricity rises dramatically. Diesel is not cheap energy and the more frequently it becomes part of normal grid support, the more expensive the overall electricity environment becomes.
That cost does not stay with Eskom. It flows directly downstream to businesses and consumers through future tariff increases and operational inefficiencies across the broader energy system, especially in an environment where most businesses are still treating electricity as a monthly cost problem.
More than backup power
A few years ago, many businesses invested in solar because they were tired of load shedding disrupting operations and having backup capability became a priority. Today, the strongest commercial argument for solar is how electricity costs are affecting the balance sheet.
Businesses want control over an expense category that is becoming increasingly difficult to forecast.
Over the last five years, solar equipment and installation costs have dropped substantially while technology has improved at a rapid pace. Panels are more efficient, inverter technology is smarter, battery systems are safer, and financing has become more accessible.
At the same time, electricity tariffs have continued climbing year after year.
For many businesses, solar systems that once felt financially out of reach are now delivering payback periods in the region of three to six years, depending on system design, operating profile, and financing structure.
After that point, the system continues generating value long after the capital cost has effectively been recovered.
What Businesses Often Miss
One of the biggest misconceptions I still encounter is the belief that solar is simply about “saving on the electricity bill” – this mindset undersells what is actually happening.
A properly designed commercial solar system changes the way a business manages energy risk altogether.
It allows businesses to:
- reduce exposure to annual tariff volatility
- improve long-term operational forecasting
- protect margins against rising utility costs
- maintain operational continuity during instability
- create infrastructure that continues generating value for years
The businesses seeing the strongest returns are not necessarily the ones chasing the cheapest installation, but they are approaching energy strategically. They understand:
- when energy is consumed
- where peak demand occurs
- how loads shift seasonally
- what future expansion may look like
- how battery integration and export opportunities fit into the bigger picture
The conversation we’re having in boardrooms becomes far more sophisticated than simply ‘putting panels on a roof’.
Final words
South Africa’s energy infrastructure still requires enormous investment, maintenance backlogs remain significant, and demand pressures are not disappearing. Businesses waiting for electricity costs to “stabilise” may be waiting a very long time. And over the next decade, that distinction is going to matter far more than many realise.