A new report released by IRENA – the International Renewable Energy Agency – confirms the cost-competitiveness of renewables. It also warns of mounting grid integration and financing challenges, notably in emerging and capital-constrained markets.
IRENA's Renewable Power Generation Costs in 2024 report confirms the cost-competitiveness of renewables.
The new report on Renewable Power Generation Costs in 2024 confirms that renewables maintained their price advantage over fossil fuels, with cost declines driven by technological innovation, competitive supply chains, and economies of scale.
In 2024, solar photovoltaics (PV) were, on average, 41% cheaper than the lowest-cost fossil fuel alternatives; onshore wind projects were 53% cheaper. Onshore wind remained the most affordable source of new renewable electricity at USD 0.034/kWh, followed by solar PV at USD 0.043/kWh.
The addition of 582 gigawatts of renewable capacity in 2024 led to significant cost savings in avoiding fossil fuel use. Notably, 91% of new renewable power projects commissioned last year were more cost-effective than any new fossil fuel alternatives.
Renewables are not only cost-competitive vis-a-vis fossil fuels but are advantageous in limiting dependence on international fuel markets and improving energy security. IRENA states that the business case for renewables is now stronger than ever.
The report also notes the declining costs of battery energy storage systems.
It highlights too that although continued cost reductions are expected as technologies mature and supply chains strengthen, short-term challenges remain. Geopolitical shifts including trade tariffs, raw material bottlenecks, and evolving manufacturing dynamics, particularly in China, pose risks that could temporarily raise costs.
Higher costs are likely to persist in Europe and North America, driven by structural challenges such as permitting delays, limited grid capacity, and higher balance-of-system expenses. In contrast, regions like Asia, Africa, and South America, with stronger learning rates and high renewable potential, could see pronounced cost declines.
Commenting on the report, IRENA Director-General Francesco La Camera said: “The cost-competitiveness of renewables is today’s reality. Looking at all renewables currently in operation, the avoided fossil fuel costs in 2024 reached up to USD 467 billion. New renewable power outcompetes fossil fuels on cost, offering a clear path to affordable, secure, and sustainable energy. This achievement is the result of years of innovation, policy direction, and growing markets. However, continuing progress is not guaranteed. Rising geopolitical tensions, trade tariffs, and material supply constraints threaten to slow the momentum and drive up costs. To safeguard the gains of the energy transition, we must reinforce international cooperation, secure open and resilient supply chains, and create stable policy and investment frameworks – especially in the Global South. The transition to renewables is irreversible, but its pace and fairness depend on the choices we make today.”
IRENA’s 2024 report also explores the structural cost drivers and market conditions shaping renewable investment. It concludes that stable and predictable revenue frameworks are essential to reduce investment risk and attract capital.
Mitigating financing risk is central to scaling up renewables in mature and emerging markets. Instruments such as power purchase agreements (PPAs) play an important role in accessing affordable finance, but inconsistent policy environments and opaque procurement processes undermine investor confidence.
Integration costs particularly are emerging as a new constraint on deployment of renewables. Increasingly, wind and solar projects are delayed due to grid connection bottlenecks, slow permitting and costly local supply chains. This is acute in G20 and emerging markets, where grid investment needs to keep pace with rising electricity demand and the expansion of renewables.
Furthermore, financing costs remain a decisive factor in determining project viability. In many developing countries of the Global South, high capital costs, influenced by macroeconomic conditions and perceived investment risks, significantly inflate the levelised cost of electricity (LCOE) of renewables.
For example, IRENA found that onshore wind generation costs were similar in Europe and Africa at around USD 0.052/kWh in 2024, but the cost structures varied significantly. European projects were capital-expenditure driven, and African projects bear a much higher share of financing costs. IRENA’s assumed cost of capital ranged from 3.8% in Europe to 12% in Africa, reflecting differing perceived risk profiles.
Another point noted is that technological advances beyond generation are improving the economics of renewables. The cost of battery energy storage systems (BESS) has declined by 93% since 2010, reaching USD 192/kWh for utility-scale systems in 2024. This reduction is attributed to the scale up of manufacturing, improved materials and optimised production techniques.
Battery storage, hybrid systems, combining solar, wind and BESS as well as digital technologies are increasingly key to integrating variable renewable energy. Artificial intelligence (AI)-enabled digital tools are enhancing asset performance and grid responsiveness. However, digital infrastructure, flexibility, and grid expansion and modernisation remain pressing challenges, including in emerging markets, where the full potential of renewables cannot be realised without further investment.
For more information visit: www.irena.org
