Grid modernisation as the catalyst for SA’s solar revolution

The South African energy landscape is undergoing a profound structural shift. By the end of 2025, the country’s cumulative installed solar PV capacity surpassed 10.2GW. This achievement ranks South Africa first in Africa for installed capacity per capita and places it among the top 20 solar markets globally.

However, as the pipeline of renewable energy projects swells to an unprecedented 220GW, of which 72GW is already at an advanced stage of development, the industry has reached a critical bottleneck. The challenge is no longer a lack of investment appetite or technology readiness; it is the physical and regulatory capacity of the national grid.

The South African Photovoltaic Industry Association (SAPVIA) message is clear: The energy transition has moved beyond the race to generate electrons; it is now a race to build the infrastructure that carries them.

The 2025 South African Renewable Energy Grid Survey highlighted a stark reality: Developers are ready to build, but grid connection remains the single largest hurdle to timely delivery.

In high-resource areas like the Northern Cape and Eastern Cape, projects are increasingly competing for limited connection points, leading to a ‘gridlock’ that threatens to stifle private sector–led growth.

“We have the current – we just lack the conduit,” says Sim Khuluse, technical and policy manager at SAPVIA.

“The priority has shifted from incentivising investment to actively unblocking the grid. By expanding and modernising our national grid infrastructure and refining wheeling frameworks, we can finally move the 220GW renewable pipeline into active production. In 2026, grid connectivity, not capital, is the final arbiter of South Africa’s energy success.”

SAPVIA has been a vocal advocate for the ‘liberation’ of the transmission grid. While the association welcomed the Electricity Regulation Amendment Act of 2025, concerns remain regarding the unbundling of Eskom.

Khuluse emphasises that for the National Transmission Company South Africa (NTCSA) to succeed, it must function an investment-grade, standalone entity capable of raising the capital required to deliver the 14 500 kilometres of new transmission lines needed this decade.

“The economics is simple: A transmission operator without a strong asset base is a high-risk borrower,” he notes.

He argues that to unlock the R440 billion required for new power lines, the NTCSA must evolve beyond its status as a subsidiary. “Ultimately, investor trust depends on two non-negotiables: transparent governance and a total firewall between the entities managing the grid and those generating the power.”

Beyond physical infrastructure, policy tools like the Grid Capacity Allocation Rules approved November 2025 are vital. By enshrining a ‘first-ready, first-served’ approach, these rules prevent ‘grid hogging’ and ensure only viable projects with secured permits and financing gain access to the limited network capacity.

The future of the South African grid is not merely larger – it is smarter. 2026 is set to be the ‘year of the hybrid’, with nearly 50% of new projects incorporating battery energy storage systems. This transition from variable generation to firm, dispatchable power, capable of providing ancillary services like frequency regulation is the new baseline for grid stability.

Smart infrastructure – including advanced metering, automated wheeling billing at the municipal level, and utility-scale storage – allows the grid to act as a dynamic marketplace rather than a one-way pipe. With the South African Wholesale Electricity Market set for enforcement in 2026, the ability to ‘time-shift’ solar generation into peak periods will become a commercial necessity.

As the voice of the PV industry, SAPVIA continues to drive the dialogue among key stakeholders. By championing quality standards through the PV GreenCard and successfully lobbying for the October 2025 simplification of Small-Scale Embedded Generation registrations, the association is ensuring the transition is not only fast but technically sound, safe and sustainable.

“Our vision is for solar PV to be a significant and reliable contributor to the South African electricity mix,” says Khuluse. “The message for 2026 is clear: By expanding and modernising our grid today, we are not just solving a technical problem, we are securing the industrial and economic future of the country.”