This year marked an unprecedented expansion in clean energy installations worldwide. Analysts project roughly 290 gigawatts of new capacity will come online before year's end—a figure that surpasses last year's record and exceeds spring forecasts. The numbers reflect a transformation underway in how the world generates electricity.
Solar Takes the Crown
Solar dominated the year's additions, accounting for more than half of all new renewable capacity. The IEA had already flagged solar as "the new king of electricity" in its October 2020 World Energy Outlook report, and 2021 data suggests that coronation is holding. Nearly 160 gigawatts of solar capacity came online globally—another record.
The technology's cost trajectory explains its dominance. Solar module prices have plummeted from $30 per watt in 1980 to roughly $0.20 per watt today. By last year, solar had become the most affordable electricity source available in most regions.
Looking ahead, analysts expect clean energy sources to account for the vast majority of new electricity-generating capacity worldwide over the next five years. Offshore wind could more than triple in the same period. Within five years, global renewable electricity capacity may rival today's combined output from fossil fuels and nuclear—a striking reversal from 2020, when renewables accounted for just 29 percent of worldwide electricity generation.
The Cost Cloud on the Horizon
Despite record growth, the outlook carries a warning. Elevated prices for raw materials, shipping, and energy threaten to complicate the transition. The polysilicon used to manufacture solar panels has climbed significantly since early 2020. Capital expenditure for large-scale wind and solar installations has increased compared to 2019 levels.
According to Rystad Energy analysis, many planned utility-scale solar projects for 2022 could face delays or cancellations due to higher material and shipping costs. Developers under pressure to cut expenses may source cheaper components, potentially trading off quality and reliability.
IEA Executive Director Fatih Birol acknowledged the tension in a recent statement: "Current elevated prices for raw materials and energy create new challenges for the renewable industry, but rising fossil fuel prices are also making renewable energy even more competitive."
The implication is a fork in the road. If commodity costs remain elevated for another year, the gains solar and wind made in affordability could erode—potentially setting the transition back several years.
Why the Pace Still Isn't Enough
Even as renewables break records, analysts warn the trajectory falls short of what's needed to address the climate crisis. Greenhouse gas emissions from burning fossil fuels must near zero by mid-century to avoid catastrophic warming. Achieving that requires new renewable capacity to grow at nearly double the rate currently projected for the next five years.
The agency characterized recent growth as "exceptionally high" and suggested it could become the "new norm"—but climate goals demand even more.
Who Should Care
| Stakeholder | Why This Matters |
|---|---|
| Utilities and developers | Project economics are shifting; commodity costs require reevaluation of timelines and component sourcing |
| Policymakers | Regulatory frameworks must balance cost pressures with deployment speed; incentives may need adjustment |
| Investors | Solar's long-term competitiveness remains strong, but near-term volatility could affect returns |
| Emerging markets | Dramatically cheaper solar creates opportunity to expand access without building legacy infrastructure |
| Consumers | Electricity rate stability depends on whether developers can navigate supply chain headwinds |
What Comes Next
The renewable sector enters 2022 at an inflection point. The structural case for solar and wind remains compelling: costs have fallen dramatically, and fossil fuel price spikes make clean alternatives look even more attractive by comparison. But the window to lock in projects at favorable economics may be narrowing.
Tracking commodity price movements—particularly for key solar components—will offer clues about whether the 2022 project pipeline holds. So will monitoring whether governments adjust permitting timelines or support structures to offset cost pressures.
Key takeaways
- This year marked an unprecedented expansion in clean energy installations, exceeding spring forecasts
- Solar dominated, accounting for more than half of new installations and cementing its position as the fastest-growing energy source
- Rising commodity costs have pushed polysilicon prices well above early-2020 levels, threatening project timelines
- Analysts project clean energy will need to grow at nearly double the anticipated rate to meet climate goals
- Near-term trajectory depends heavily on whether supply chain pressures ease or persist through 2022
Frequently asked questions
How much renewable energy capacity was added in 2021?
Analysts project approximately 290 gigawatts of new renewable capacity will come online globally by the end of 2021, setting a new record that surpasses last year's figures and exceeds spring forecasts.
Why has solar energy grown so dramatically?
Solar module costs have plummeted from $30 per watt in 1980 to roughly $0.20 per watt today. By last year, solar had become the most affordable electricity source available in most regions, driving unprecedented adoption.
What risks threaten the renewable energy boom?
Rising commodity and shipping costs pose the most immediate threat. Polysilicon prices have climbed significantly since early 2020, and capital expenditure for large-scale wind and solar installations has increased compared to 2019. These pressures could delay or cancel many planned utility-scale solar projects for 2022, according to Rystad Energy analysis.
What does the IEA say about future growth?
The agency expects clean energy sources to account for the vast majority of new power capacity globally over the next five years, with offshore wind capacity potentially tripling. Global renewable electricity capacity could rival today's combined fossil fuel and nuclear output within five years.
Is the current growth rate sufficient for climate goals?
No. Analysts warn that meeting climate targets requires new renewable capacity to grow at nearly double the rate currently projected for the next five years. While 2021's record is encouraging, the pace must accelerate significantly to avoid catastrophic warming.