Top 5 Reasons Your Business Should Install Solar in 2026
For the better part of a decade, the business case for solar in South Africa wrote itself.
The lights went out, the generators came on, and anything that kept the doors open paid for itself in a matter of months.
That urgency has faded. Eskom has now gone the better part of a year without implementing load shedding, and the 2026 winter outlook projects continued stability. So the question business owners are asking has changed.
It is no longer how quickly can we get off the grid? It is does this still make sense now that the crisis has eased?
The answer, for most commercial operations, is yes, and arguably more so than before. The reasons have simply shifted from survival to economics.
Here are the five that matter most in 2026.
1. Cost Savings That Compound Every Single Year
This is the reason that has quietly overtaken all the others.
Electricity is no longer just a line item that goes up with inflation. It goes up considerably faster, and it has done so consistently for more than fifteen years.
For the 2026/27 financial year, NERSA approved an 8.76% increase for Eskom direct customers from 1 April 2026, followed by 9.01% for municipal customers from 1 July. Those figures came in well above the 5.36% originally set out under the sixth multi-year price determination, after a High Court-ordered redetermination of Eskom’s regulatory asset base added roughly R12 billion to the recoverable amount for the year. A further increase of around 8.83% has already been approved for 2027/28.
Read that trajectory carefully, because it is the whole argument.
A business absorbing compounding increases of 8% to 9% a year sees its electricity bill roughly double inside eight years, before a single new machine is switched on or a square metre of floor space is added.
A commercial solar system inverts that relationship. You convert a variable, escalating operating expense into a fixed capital cost with a known payback period. Alternatively the system can also be financed through a rent to own (RTO) or power purchase agreement (PPA) without any capital burden on the balance sheet converting the expense into an operational expense. Once that period passes, the energy your roof produces is effectively free for the remaining fifteen to twenty years of the system’s life.
That is the part most financial models understate.
The saving is not the difference between your bill today and your bill with solar. It is the difference between your bill with solar and the bill you would have been paying in 2035.
If you want to see what that looks like for your own consumption profile, our solar calculator is a reasonable starting point before you commission a full energy audit.
2. Energy Independence Is Still Worth Paying For
Load shedding has receded. It has not been abolished.
Eskom’s own 2026 winter outlook reports a genuinely improved picture: the energy availability factor has climbed from 54.55% in FY2023 to roughly 65.35% in FY2026, and unplanned capacity losses have dropped by about 7.1GW.
That is real progress, and it deserves to be acknowledged.
But an EAF in the mid-sixties still means that more than a third of Eskom’s installed capacity is unavailable at any given moment. The margin is better. It is not generous.
And national generation is only half the risk. Municipal distribution infrastructure across much of Gauteng, KwaZulu-Natal and the Eastern Cape remains under-maintained, which is why so many businesses lose power to substation failures, cable theft and local network faults on days when the national grid is perfectly stable.
Energy independence in 2026 means insulating yourself from that whole category of disruption, not just from Eskom.
The businesses that feel this most acutely are the ones where downtime has a hard rand cost per hour:
- Cold chain and food production, where an interrupted refrigeration cycle can write off an entire batch
- Manufacturing, where restarting a line costs far more than the hours lost
- Retail and hospitality, where a dark shop is a shop taking no money at all
- Medical, dental and pharmaceutical practices, where product integrity and patient safety are on the line
- Data-dependent professional services, where staff simply cannot work
For these operations, pairing generation with storage is usually the sensible route. We covered the economics of that decision in detail in our guide to battery storage for commercial solar, including how time-of-use arbitrage can generate a return even in a year with no outages at all.
3. The Tax Position Still Works Hard in Your Favour
A great deal of confusion has crept in here since the enhanced allowance lapsed, so it is worth being precise.
Section 12BA, the temporary provision that allowed a 125% first-year deduction, applied only to assets brought into use between 1 March 2023 and 28 February 2025. It was not renewed in the 2025 Budget, and it has not been reinstated since.
What many business owners have wrongly concluded is that the incentive disappeared altogether.
It did not. Section 12B is permanent legislation with no expiry date, and it remains available in 2026. For solar PV installations up to 1MW, it allows a 100% deduction of qualifying costs in the year the asset is brought into use. For larger installations, an accelerated 50/30/20 write-off applies across three years.
In practical terms, a R2 million commercial system deducted in full at the 27% corporate rate reduces your tax liability by R540 000 in year one. The deduction is not pro-rated, so an asset commissioned on the final day of your financial year still attracts the full allowance for that year of assessment.
VAT-registered businesses can additionally claim input VAT on both purchase and installation costs.
We have unpacked the qualifying criteria, documentation requirements and common SARS queries in our Section 12B explainer, which is worth reading alongside your accountant before you commit.
Where capital is the constraint rather than the appetite, our solar financing solutions and rent-to-own model allow businesses to move to solar without a large upfront outlay, structuring repayments against the savings the system generates.
4. Sustainability Has Become a Commercial Requirement, Not a Nice-to-Have
For years, the environmental argument sat politely at the end of the brochure. In 2026 it has moved onto the balance sheet.
Phase 2 of South Africa’s carbon tax regime commenced on 1 January 2026, lifting the headline rate from R236 to R308 per tonne of CO₂e, the steepest single increase since the tax was introduced in 2019. The published trajectory takes the rate to R462 per tonne by 2030, with allowance rebates tightening in parallel. For emitters currently paying very little in effective terms, the compounding effect of a rising rate against a shrinking rebate is significant.
The pressure from export markets is arriving on a similar timeline. The EU’s Carbon Border Adjustment Mechanism entered its definitive phase on 1 January 2026, placing a carbon-linked charge on embedded emissions in steel, aluminium, cement, fertiliser, hydrogen and electricity entering the bloc. Because South Africa’s grid remains among the most carbon-intensive in the world, local exporters carry an embedded emissions burden that competitors in cleaner-grid economies simply do not.
Then there is the supply chain. Large corporates and multinationals reporting under Scope 3 frameworks are increasingly asking their suppliers to account for their own emissions, and increasingly making it a condition of tender.
Generating your own clean electricity addresses all three pressures with the same asset. It reduces your measured emissions, strengthens your position in procurement processes, and gives you something defensible to put in a sustainability report rather than a paragraph of intent.
5. A Predictable Cost Base Is a Competitive Advantage
The final reason is the least quantifiable and, for many owners, the most persuasive.
Businesses compete on price. Price depends on cost. And in an economy where one of your largest input costs rises unpredictably by high single digits every year, long-term pricing becomes an exercise in guesswork.
A solar installation removes a meaningful portion of that volatility from your forecast. You know roughly what a substantial share of your electricity will cost in 2031, because you have already paid for it.
That certainty shows up in places you might not expect. It makes multi-year supply contracts easier to price with confidence. It makes budgeting less defensive. It improves the underlying asset value of commercial property, since a building with its own generation and storage infrastructure commands stronger interest from both buyers and tenants.
And it changes how your business reads to the people assessing it, whether that is a bank, a landlord, a major client or an eventual acquirer.
Is Solar Still Worth It Now That Load Shedding Has Eased?
This is the question we field most often, so it deserves a direct answer.
Yes, but the reasoning has changed, and businesses should expect the payback conversation to look different from the one they might have had in 2023.
When outages were daily, solar was justified by avoided downtime, and paybacks were often absurdly short as a result. With a more stable grid, the return is driven primarily by tariff avoidance and tax treatment rather than by crisis mitigation. Payback periods have lengthened somewhat in exchange for becoming far more predictable.
For a well-sized commercial system matched properly to a daytime consumption profile, that return remains strong, and it improves with every tariff increase that follows.
Where businesses get this wrong is in sizing. A system built for a load profile you no longer have, or specified without a proper energy audit, will underperform regardless of how good the panels are. That assessment is the first step of any serious commercial solar project, and no reputable installer should be quoting hardware before it is done.
Ready to Find Out What Solar Would Save Your Business?
The case for commercial solar in 2026 is less dramatic than it was three years ago, and considerably more durable.
Tariffs are rising faster than inflation and will continue to. The tax treatment is favourable and permanent. Carbon costs are climbing on a published schedule. And the grid, while much improved, is not a system any business should build its continuity plan around.
Solar Projects has designed and installed commercial systems for clients including Engen, Afrimat, Famous Brands and Southern Implants, and we start every project with a proper assessment rather than a price list.
Get in touch for a commercial solar assessment and we will show you the numbers for your building, your tariff and your consumption profile.
Frequently Asked Questions about Solar Energy
- Cost reduction
- Energy independence
- Eco-friendly
- Incentive opportunities
- Property value
The answer, though, is simple: Large appliances. If you're running a central air conditioner (which uses about 2,000 kilowatt hours of electricity per year), heat pump, or clothes washer or dryer frequently, you could be consuming much more energy than you regularly do.
Yes, solar panels work on cloudy days, but they are significantly less efficient and produce about 10–25% of their normal power output. Sunlight still reaches the panels as a diffuse light source, and modern panels can still generate electricity, though much less than on a clear, sunny day. The exact amount of power generated depends on the cloud cover's thickness.
The size of the solar system you need depends on your energy consumption, the size of your roof, and the amount of sunlight your home receives. Get in touch today and let us help you determine the appropriate size for your needs.
While it is possible to install a solar system yourself, it is highly recommended to hire a professional solar installer (like us) to ensure that the system is installed safely and correctly.
WHO WE ARE AT SOLAR PROJECTS
Solar Projects part of the EEC family, offering a full range of solar energy services, from designing and installing your system to keeping it running smoothly with ongoing maintenance.
We help our clients with:
- Solar Financial Solutions
- Residential Solar Projects
- Commercial Solar Projects
- Solar Rent To Own Financing
