The International Energy Agency (IEA) has projected that global clean energy investment will reach an unprecedented $2.2 trillion in 2025—more than double the capital expected to flow into fossil fuels. The development reflects growing global interest in renewable technologies amid escalating climate concerns and economic shifts.
However, the IEA’s newly released World Energy Investment 2025 report warns that despite the historic surge in funding for clean energy technologies such as solar photovoltaics (PV), electric vehicles (EVs), wind, and battery storage, critical investments in power grids and electricity infrastructure are dangerously lagging. This imbalance, the agency cautions, could threaten the reliability and security of electricity systems worldwide—particularly in developing countries like Nigeria.
According to the IEA report, solar PV alone is set to attract a record $450 billion in investment this year, reaffirming its status as the world’s most dominant renewable energy source. Battery storage is also on a sharp upward trajectory, projected to surpass $65 billion in 2025 as countries race to bolster their energy resilience and capacity to integrate intermittent renewables.
In a major shift in global energy priorities, the IEA noted that investments in electricity—including power generation, grid upgrades, and energy storage—now exceed fossil fuel investment by over 50 percent.
“Driven by policy incentives, energy security considerations, cost-competitiveness, and the urgent need for emission reductions, we are witnessing a historic pivot toward clean technology,” said IEA Executive Director Fatih Birol. “This marks the dawn of an age of electricity.”
Despite the global progress, the IEA report underscores an urgent challenge in emerging economies—insufficient electricity transmission and distribution infrastructure. Nigeria stands as a stark example. While the country boasts an installed generation capacity of around 13,500 megawatts (MW), it can only reliably deliver between 4,000MW and 5,100MW due to chronic grid failures, ageing infrastructure, and vandalism.
“Much of Nigeria’s transmission infrastructure dates back over 40 years,” said Lagos-based energy economist, Olamide Egbeyemi. “Unless grid capacity is expanded and modernized, additional generation from solar farms or hydro projects will remain largely underutilised.”
The IEA estimates that bridging Africa’s electricity access gap by 2030 will require annual investments of about $100 billion, with Nigeria alone needing tens of billions to overhaul its power infrastructure.
Globally, annual investment in grids stands at around $400 billion—a figure the IEA deems insufficient given the rapid pace of renewable deployment. The agency recommends that grid investment must match power generation spending by the early 2030s to ensure system reliability.
Key bottlenecks include complex permitting processes, outdated regulatory frameworks, and supply chain constraints that delay infrastructure expansion. These challenges must be addressed swiftly to avoid a disconnect between clean energy availability and end-user access.
Interestingly, the report also highlights a resurgence in nuclear energy investment, with capital flows to nuclear projects increasing by 50 percent over the past five years. Nuclear is expected to attract around $75 billion in 2025, offering an additional low-carbon baseload option for countries looking to diversify energy sources.
While the surge in clean energy investment marks a significant milestone on the road to global decarbonisation, the IEA’s message is clear: investment alone is not enough. Without parallel commitments to upgrading electricity grids and infrastructure, the clean energy revolution could falter under its own weight.
For countries like Nigeria, this is both a warning and an opportunity. As the global financial community intensifies its focus on sustainable energy, there’s an opening for African nations to attract green capital—if they can put the right policies, regulatory stability, and infrastructure planning in place.