1. Global Renewable Energy Overview

1.1 Market Growth and Capacity Additions

The global energy transition reached a historic milestone in 2025 as renewable energy sources, including solar, wind, hydro, and geothermal, generated more electricity than coal for the first time on record. According to Ember Energy's mid-year analysis, renewables produced 5,072 TWh in the first half of 2025, representing a 34.3% share of global electricity generation, while coal generation fell to 4,896 TWh (33.1% share).

This achievement marks a fundamental shift in the global power system. Solar energy has emerged as the dominant force driving this transformation, with its growth more than three times larger than any other electricity source in 2025. The International Energy Agency (IEA) projects that global renewable power capacity will increase by approximately 4,600 GW between 2025 and 2030—equivalent to the combined installed power capacity of China, the European Union, and Japan.

The growth trajectory positions the world to potentially achieve the COP28 goal of tripling renewable energy capacity by 2030. Current projections indicate that only a modest increase in annual additions is needed to stay on track for this ambitious target. However, the IEA has revised its 2025-2030 forecast downward by 5% compared to 2024 projections, reflecting policy, regulatory, and market changes that have emerged since October 2024.

Technology	2024 Capacity	2030 Projection	Growth Rate
Solar PV	2,260 GW	~5,800 GW	+157%
Onshore Wind	~850 GW	~1,580 GW	+86%
Offshore Wind	83 GW	~223 GW	+169%
Hydropower	~1,400 GW	~1,550 GW	+11%

Table 1: Global Renewable Capacity Projections by Technology (Source: IEA Renewables 2025, GWEC)

1.2 Investment Trends

Global investment in the energy transition reached a new record of $2.4 trillion in 2024, representing a 20% increase from the average annual levels of 2022 and 2023, according to IRENA and Climate Policy Initiative. Renewable energy technologies captured approximately one-third of this investment, totaling $807 billion.

However, the investment landscape reveals concerning trends. Despite the record absolute figures, year-on-year growth of renewables investment slowed significantly to 7.3% in 2024, compared to 32% in 2023. This deceleration raises questions about whether current investment levels are sufficient to meet the 1.5°C pathway outlined in IRENA's World Energy Transitions Outlook.

The three largest investment sectors—electrified transport ($757 billion), renewable energy ($728 billion), and power grids ($390 billion)—accounted for 90% of total energy transition investment in 2024. All three sectors reached new record levels, with electrified transport growing 20%, power grids 15%, and renewable energy 8%.

2. Solar Energy Sector

2.1 Capacity and Deployment

Solar photovoltaic technology has firmly established itself as the cornerstone of global electricity generation. According to the IEA PVPS Trends 2025 report, cumulative installed PV capacity surpassed 2,260 GW by the end of 2024, marking a 29% year-on-year increase. The world added between 553 GW and 601 GW of new solar capacity in 2024—a remarkable 29% increase compared to 2023.

The IEA projects that solar PV will account for nearly 80% of the total global renewable electricity capacity increase between 2025 and 2030. Approximately 3.6 TW of solar is expected to be installed globally during this period, with annual additions reaching nearly 600 GW in 2025 before moderating slightly through 2028 and accelerating toward 700 GW by 2030.

Country/Region	2024 Additions (GW)	Share of Global	Cumulative (GW)
China	309-357	~60%	1,000+
European Union	66	~11%	~320
United States	47	~8%	~200
India	32	~5%	~90
Brazil	14.3	~2%	52

Table 2: Solar PV Capacity Additions by Major Market (Source: IEA PVPS, 2025)

2.2 Regional Market Dynamics

China's dominance in the solar market continues to reshape global dynamics. The country installed between 309 GW and 357 GW in 2024, accounting for nearly 60% of all new global capacity. Remarkably, China now hosts almost half of global PV capacity, with its cumulative installations exceeding 1 TW.

Europe's solar market showed strong performance, with the EU adding 66 GW led by Germany (17.2 GW), Spain (8.7 GW), Italy (6.7 GW), France (6 GW), and Poland (4.2 GW). The IEA has revised the EU's forecast upward, driven by policy improvements and faster permitting processes in key markets.

Perhaps most significantly, solar is now accelerating across Africa and other emerging markets. Ember reported that imports of Chinese solar panels to Africa rose 60% in the 12 months to June 2025, with total imports reaching 15 GW of capacity. Some markets saw dramatic growth: Algeria's imports rose 33-fold, Zambia eightfold, Botswana sevenfold, and Sudan sixfold.

3. Wind Energy Sector

3.1 Onshore Wind Developments

Onshore wind continues to be a critical component of the renewable energy mix, with the IEA forecasting cumulative capacity additions of 732 GW between 2025 and 2030—a 45% increase compared to the previous five-year period. Despite challenges including supply chain bottlenecks, inflation, and long permitting timelines, strong policy support in both advanced and developing countries is expected to drive robust expansion.

Germany exemplifies this momentum, awarding nearly 11 GW of new onshore wind capacity in tenders in 2024—an all-time high representing a 70% year-on-year increase. This surge results mainly from permitting condition improvements that addressed years of undersubscribed auctions.

The United States wind market is projected to install over 7 GW of capacity in 2025, a 36% increase from 2024. However, regulatory uncertainty has driven turbine orders down 50% in the first half of 2025, reaching their lowest level since 2020. The IEA revised its U.S. wind forecast down approximately 60%, representing 57 GW of capacity that is now unlikely to be built during the 2025-2030 period.

3.2 Offshore Wind Expansion

Offshore wind represents one of the most dynamic segments of the renewable energy sector, though it faces significant headwinds. Global offshore wind capacity reached 83 GW by the end of 2024, with an additional 48 GW under construction as of May 2025, positioning the sector for accelerated growth through the decade.

The IEA projects offshore wind capacity expansion of 140 GW over the 2025-2030 forecast period—more than doubling the growth of the previous five-year period. The annual offshore wind market is expected to expand from 9.2 GW in 2024 to over 37 GW by 2030, with China accounting for almost 50% of this increase.

Region	2024 Capacity	2030 Projection	Key Projects
China	~40 GW	~120 GW	Dominant market leader
Europe	~32 GW	~90 GW	UK, Germany, Netherlands leading
Asia-Pacific (ex-China)	~8 GW	~35 GW	Taiwan, Japan, South Korea
United States	~3 GW	~15 GW	Vineyard Wind, Revolution Wind

Table 3: Offshore Wind Capacity by Region (Source: GWEC Global Wind Report 2025)

However, the offshore wind sector faces significant challenges. Policy changes in the United States, macroeconomic pressures, and supply chain challenges have raised costs and undermined project bankability in several European markets and Japan. As a result, the IEA has revised the global offshore wind capacity forecast 27% downward from last year, with offshore wind auction volumes plummeting to just 2.5 GW in the first half of 2025.

4. Conclusion and Outlook

The renewable energy sector stands at a pivotal moment in 2025. The historic milestone of renewables overtaking coal in global electricity generation demonstrates the accelerating momentum of the energy transition. Solar and wind technologies are no longer merely catching up to demand growth—they are outpacing it, meeting and exceeding all new electricity demand growth in the first three quarters of 2025.

Looking ahead, several key factors will determine the trajectory of renewable energy deployment:

• Policy Stability: Regulatory certainty remains critical for maintaining investment flows, particularly in markets facing political transitions.
• Grid Infrastructure: The pace of renewable deployment increasingly depends on grid integration capabilities and transmission infrastructure development.
• Supply Chain Resilience: Addressing manufacturing bottlenecks and raw material cost fluctuations will be essential for sustaining growth.
• Financing Access: Expanding access to capital for emerging and developing economies remains a critical challenge for global equity in the energy transition.
• Technology Innovation: Continued advances in energy storage, grid flexibility, and hybrid systems will enable higher penetration of variable renewable sources.

The pathway to tripling renewable capacity by 2030 remains achievable but requires sustained commitment. Current projections indicate that only a modest acceleration in annual additions is needed to meet this goal. However, the recent downward revision in forecasts underscores the importance of addressing policy, regulatory, and market barriers that could impede progress.