In 2004, the world installed one gigawatt (GW) of solar power in a year. By 2025, that amount went online every single day. Global renewable capacity passed 5,000 GW by year-end, and Science Magazine named the surge its 2025 Breakthrough of the Year. Coal still generated 34% of global electricity in 2025, the International Energy Agency said; renewables accounted for 49.5% of installed capacity., and U.S. renewables supplied a record 25.7% of electricity in 2025.
Growth is now running into the grid. In October 2026, the International Renewable Energy Agency (IRENA) said global additions will likely fall below 2025's record 692 GW this year, the first drop after five years of growth. More than 3,000 GW of projects are waiting for grid connections, and China's slowdown reflects limits that stop its grid absorbing all the power it generates. In the U.S., solar passed wind, nuclear and hydropower in utility-scale capacity in early 2026. The U.S. Energy Information Administration (EIA) projects renewables and batteries will make up 99.2% of 2026 capacity additions. Solar costs 89% less than a decade ago, and adoption is rising fast in Africa (solar up 54% in 2025) and India (51.5% non-fossil capacity, met five years early).
Why it matters
The pace of renewable growth now determines whether the world can cut fossil fuel use fast enough to avoid the worst climate impacts.
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Key Indicators
1,162 TWh
U.S. renewables generation 2025
Renewables generated record 1,162 TWh in 2025 (10% YoY growth); now second-largest U.S. source behind natural gas.
25.7%
U.S. renewables electricity share 2025
Renewables generated 25.7% of U.S. electricity in 2025, up from 24.1% prior year; solar grew 34.5% in utility-scale generation.
53 GW
U.S. renewable capacity added 2025
Largest single-year renewable capacity installation since 2002, led by solar expansion.
5,200 GW
Global renewable capacity, end of 2025
IRENA's July 2026 statistics put total capacity at 5.2 terawatts, or 49.5% of global capacity, after a record 693 GW was added in 2025.
31.7%
Global renewable electricity share, 2024
IRENA reported renewables generated 31.7% of global electricity in 2024, with solar and wind driving most of the growth.
34%
Coal share of global electricity, 2025
Coal remained the largest single source of electricity in 2025 at 34% of global generation, the IEA reported.
3,000+ GW
Renewable projects awaiting grid connection
IRENA director-general Francesco La Camera said in October 2026 that grid capacity is now a constraint on new installations.
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Oscar Wilde
(1854-1900) ·Victorian · wit
Fictional AI pastiche — not real quote.
"How delightful that humanity has finally discovered virtue becomes infinitely more fashionable when it costs nothing at all. We spent a century pretending to worship the sun as a deity of conscience, only to embrace it the moment we realized it was merely good business—proving once again that we are far too practical a species to ever be truly moral."
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28 events
Latest: October 28th, 2026 · 2 weeks ago
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October 2026
Scatec Secures Financing for 569 MW Egypt Solar Project
LatestMilestone
Scatec signed loan agreements for the first phase of the Dandara project in Egypt and began construction. The phase includes a 569 MW solar plant and a 100 MWh battery system under a 25-year power purchase agreement.
China's Solar and Wind Capacity Passes 2 Terawatts
Milestone
China's combined solar and wind capacity passed 2,010 gigawatts by the end of September 2026, with solar alone surpassing coal. Solar and wind supplied 64% of new electricity demand.
IRENA Warns 2026 Renewable Additions Will Fall
Forecast
IRENA director-general Francesco La Camera said 2026 additions will likely fall below 2025's record, which IRENA later revised to 693 GW. More than 3,000 GW of projects await grid connections, and China is slowing where grids cannot absorb output.
EIA Data Projects Renewables Passing Gas in U.S. Capacity
Forecast
EIA data shows renewables' share of total U.S. generating capacity rising from 37.7% to 40.4% over the coming year. That would put renewables ahead of natural gas and five times ahead of nuclear.
Maryland Opens $200M Clean Energy Auction
Policy
Governor Wes Moore launched the Megawatts for Maryland program, a $200 million auction to fund in-state solar, wind and other generation. Officials said it will not lower electric bills soon.
Solar Overtakes Nuclear in Global Generation
Milestone
Solar power generated more electricity worldwide than nuclear in 2025 and was running 13% ahead over the past year, according to Fix The News.
September 2026
IRENA Says Pace Must More Than Double
Forecast
IRENA reported that 693 gigawatts of renewable capacity was added in 2025, a record, but meeting the goal of tripling renewables by 2030 requires more than doubling the annual pace. Energy efficiency improvements fell to about 2% in 2025, short of the 4% annual rate needed.
July 2026
IRENA Reports Record Renewable Growth
Data
IRENA's Renewable Energy Statistics 2026 put global renewable capacity at 5.2 terawatts at the end of 2025, or 49.5% of total capacity. Renewables generated 31.7% of global electricity in 2024, and 693 gigawatts of capacity were added in 2025.
April 2026
U.S. Solar Passes Wind, Nuclear and Hydro in Utility Capacity
Milestone
New analysis of EIA data shows utility-scale solar reached about 12.2% of U.S. capacity, ahead of wind at 11.9%. The EIA projects 86 GW of 2026 additions, 51% solar and 28% battery storage.
February 2026
EIA Confirms Record U.S. Renewable Generation in 2025
Data
U.S. Energy Information Administration released final 2025 data showing renewables generated record 1,162 TWh (10% YoY), with utility-scale solar up 34.5%; 53 GW new renewable capacity added, largest since 2002. Natural gas output fell 3.3%.
U.S. Solar Tariff Decisions Imminent
Policy
Preliminary countervailing duty rates on solar cells and modules from India, Indonesia, and Laos expected end of February 2026, with preliminary anti-dumping duties due end of April. Rates expected to be prohibitive when combined.
China Revises 2026 Solar Forecast Downward
Forecast
China Photovoltaic Industry Association released revised forecast of 180-240 GW solar capacity additions for 2026, down from earlier 235 GW estimate, reflecting intense price competition and industry consolidation. CPIA expects average annual additions of 238-287 GW through 2030.
Global Clean Energy Deployment Accelerates Across Four Continents
Milestone
Australia achieved 50%+ renewable grid penetration in Q4 2025; Africa recorded 54% YoY solar growth; EU wind+solar reached 30% of generation; India hit 51.5% non-fossil capacity five years ahead of target. China added 543 GW total capacity in 2025.
China Forecast to Add 235 GW Solar in 2026
Forecast
China expected to commission 235 GW of solar PV and 98 GW of wind capacity in 2026, continuing its dominance in global renewable deployment and pushing total global renewable additions higher.
January 2026
U.S. Renewables Set to Dominate 2026 Capacity Additions
Milestone
U.S. Energy Information Administration projects renewables and battery storage will account for 99.2% of net new generating capacity in 2026, with solar and wind combined reaching 21% of U.S. electricity generation by 2027.
IRENA Plans Fossil Fuel Transition Roadmap
Policy
International Renewable Energy Agency preparing comprehensive strategy to phase out fossil fuels globally, to be presented at COP31 leadership meetings.
Global Renewable Capacity Surpasses 5,000 GW
Milestone
World reaches over 5,000 GW of installed renewable power capacity by end of 2025, with additions only needing to rise 12% annually through 2030 to meet global tripling targets.
December 2025
Science Names Renewable Surge 2025 Breakthrough
Recognition
Science Magazine selected the growth of renewable energy as its annual Breakthrough of the Year, citing the sector's shift from virtue-driven adoption to economic inevitability.
July 2025
Renewables Overtake Coal in First Half of 2025
Milestone
For the first time, renewable sources generated more electricity than coal worldwide in the first half of 2025, reaching 34.3% of global generation versus coal's 33.1%, Ember reported. Coal remained the largest single source for the full year, the IEA later said.
May 2025
China Exceeds 1 Terawatt of Solar Capacity
Milestone
China became the first country to surpass one terawatt of installed solar power, a capacity equivalent to roughly 1,000 nuclear reactors.
2025
India Crosses 100 GW Solar Threshold
Milestone
India's installed solar capacity surpassed 100 gigawatts, with the country adding nearly 35 GW in 2025 alone—a 41% year-over-year increase.
March 2024
China's Emissions Begin 18-Month Plateau
Climate
China's carbon dioxide emissions flattened or declined, a trend that would continue for 18 months as renewable deployment outpaced electricity demand growth.
2024
Global Solar Installations Hit 585 GW Record
Milestone
The world installed a record 585 gigawatts of new solar capacity in 2024, 30% more than 2023 and more than double the 2022 figure.
2019
Denmark Exceeds 50% Wind Power
Milestone
Denmark became the first country to generate more than half its electricity from wind, demonstrating that high renewable penetration was technically feasible.
2010
Solar Cost Baseline Established
Milestone
Residential solar installations cost roughly $8.70 per watt; utility-scale systems around $7.50 per watt, setting the baseline for subsequent price declines.
April 2000
Germany Enacts Renewable Energy Act
Policy
Germany's Erneuerbare-Energien-Gesetz established feed-in tariffs guaranteeing prices for renewable electricity, accelerating solar and wind deployment.
1979
First Modern Wind Turbine Launched
Technology
Danish company Vestas released its V10-30kW model, launching the modern wind power industry.
October 1973
Arab Oil Embargo Sparks Energy Crisis
Origin
The Organization of Arab Petroleum Exporting Countries declared an oil embargo, triggering the first modern energy crisis and catalyzing government investment in alternative energy research.
Scenarios
1
Renewables Deliver 50% of Global Power by 2030
Likely
Discussed by: International Energy Agency, World Energy Outlook 2025; Ember Global Electricity Review
If current deployment trends continue—particularly the 50-70% annual growth rates seen in solar installations—renewables could supply half of global electricity by 2030, with solar alone quadrupling from 2023 levels. This scenario assumes continued cost declines, adequate grid investment (estimated at $14 trillion globally through 2050), and stable policy support in major markets. China's trajectory is determinative: the country already accounts for 55% of global solar deployment growth.
Existing electrical grids, designed for centralized fossil fuel generation, may struggle to absorb variable renewable output at the pace required. Without massive upgrades to transmission lines, battery storage, and smart grid management, curtailment of renewable power could increase significantly. This scenario would see deployment continuing but utilization rates falling, slowing effective decarbonization despite capacity additions.
3
Policy Reversals Stall Transition Outside China
Possible
Discussed by: Resources for the Future Global Energy Outlook 2025; climate policy analysts
The United States and other major economies retreat from clean energy incentives while maintaining fossil fuel support. As the U.S. under the current administration cuts renewable subsidies and eases oil and gas licensing, other nations may follow, fragmenting global momentum. China would continue dominating renewable manufacturing and deployment, but overall global growth rates could moderate, delaying peak fossil fuel demand beyond current projections.
If China's emissions plateau holds and renewable deployment continues accelerating in India, Africa, and other emerging markets, 2025 or 2026 could mark the peak of global fossil fuel carbon emissions. This would represent a historic inflection point—the moment after which emissions begin a permanent decline. The scenario depends on China maintaining its clean energy investment trajectory and emerging economies leapfrogging fossil fuel infrastructure.
5
U.S. Policy Volatility Fragments Global Supply Chains
Possible
Discussed by: Deloitte 2026 Renewable Energy Outlook; renewable energy industry analysts
New foreign entity of concern (FEOC) sourcing rules targeting China-linked entities create supply chain disruptions and cost pressures. While U.S. deployment continues through safe-harbor projects, global manufacturing and component sourcing fragment, raising costs in non-U.S. markets and slowing deployment in price-sensitive regions like Africa and South Asia.
6
Battery Storage Becomes Grid Bottleneck Solution
Likely
Discussed by: EIA capacity forecasts; Deloitte renewable outlook
As solar and wind reach 25-30% of U.S. generation, battery storage deployment accelerates to manage variability. By 2030, storage capacity could reach 187 GW, with over half paired to solar installations. This solves grid integration challenges but requires sustained investment in manufacturing and grid upgrades.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
1 of 3
October 1973 - March 1974
1973 Oil Embargo
Arab oil-exporting nations imposed an embargo on the United States and other countries supporting Israel in the Yom Kippur War. Oil prices quadrupled, gas lines stretched for blocks, and industrialized economies faced their first modern energy crisis.
Then
The embargo catalyzed the creation of the International Energy Agency in 1974 and prompted governments to fund alternative energy research.
Now
It planted the seeds of the modern renewable energy industry, though fossil fuel abundance in the 1980s-90s delayed widespread adoption by decades.
Why this matters now
Today's renewable surge completes a 52-year arc that began with the oil crisis—except now economics, not crisis response, drives adoption.
2 of 3
April 2000 - present
Germany's Energiewende (2000-present)
Germany enacted the Renewable Energy Act, guaranteeing fixed prices for solar and wind electricity. The policy triggered a boom in distributed generation, with citizens and cooperatives rather than utilities leading deployment. By 2020, renewables supplied over 40% of German electricity.
Then
Electricity prices rose significantly for consumers, drawing criticism, but renewable costs plummeted as German demand created global manufacturing scale.
Now
Germany's subsidy-driven market creation is credited with driving the 89% solar cost decline that now makes renewables economically competitive worldwide.
Why this matters now
The current global transition is reaping the benefits of Germany's early, expensive investments—today's cheap solar exists because Germany paid premium prices 15 years ago.
3 of 3
1979 - 2019
Denmark's Wind Power Breakthrough (1979-2019)
Following the oil crisis, Denmark invested heavily in wind power, with Vestas launching the modern wind turbine industry in 1979. By 2019, Denmark became the first country where wind generated more than 50% of electricity.
Then
Denmark created a world-leading wind industry and dramatically reduced fossil fuel dependence.
Now
Danish success demonstrated that high renewable penetration was technically achievable, influencing other nations' ambitions.
Why this matters now
Denmark's path showed that renewable-majority grids were possible—a proof of concept that informed the IEA's current projections of 50% global renewable share by 2030.
