IRENA Insights - 24/7 Renewables: The Economics of Firm Solar and Wind

IRENA Insights - 24/7 Renewables: The Economics of Firm Solar and Wind

by Sai Darur · View the channel on PSI

Applied Sciences & Engineering Economics & Finance KCVEconomics of specific sectorsKCVGEnvironmental economics
🎙 Sai Darur 👥 12K 📅 September 9, 2026 ⏱ 34 min 👁 6 📄 original study 🧭 2026-09-09
Available in: English (current) Français

Keywords

firm LCOErenewable hybrid systemssolar storageround-the-clock powercost competitiveness

Summary

This IRENA Insights webinar, presented by Sai Darur, introduces the concept of firm levelised cost of electricity (firm LCOE) as a benchmark for round-the-clock renewable power. The analysis incorporates battery storage, generation overbuild, and complementary renewables into the conventional LCOE. Using a linear optimization model, the study calculates firm LCOE for various global sites, revealing that co-located solar, wind, and battery systems at high-quality locations can deliver 24/7 electricity at USD 54–82 per MWh, competitive with new coal and gas plants. The presentation highlights key drivers such as resource quality, technology costs, and weather patterns, with a case study of 250+ Chinese solar projects showing most can produce firm power below USD 100/MWh. Costs are projected to drop further by 30% by 2030 and 50% by 2035. The webinar also discusses limitations, including reliance on constant demand and single-year weather data, but emphasizes the growing commercial relevance for data centers and industrial consumers. The presentation concludes with future outlook and Q&A.

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Critical Evaluation

Value of the Information & Strength of the Argument

The value of this presentation lies in its introduction of a practical metric (firm LCOE) that addresses the limitations of conventional LCOE in renewable hybrid systems. It provides concrete cost figures across multiple geographies, grounded in transparent assumptions and a replicable methodology. The argumentation is solid: it logically moves from the need for firm power to the conceptual framework, then to quantitative examples and cost comparisons. The speaker acknowledges caveats (e.g., constant demand, battery-only storage) and explains the influence of resource quality and technology cost declines. The use of a real project (Alafra in UAE) and recent Indian tenders strengthens the real-world relevance. Overall, the information is substantive and well-reasoned.

Scientific Rigor, Source Quality, Title Accuracy

Scientific rigor is high: the presentation is based on an official IRENA report, and the methodology is clearly explained, including the optimization approach and assumptions. The sources are credible (IRENA’s own publications, with references to the costing report and the full 24/7 Renewables report). The title is appropriate and reflects the content accurately. However, the webinar does not provide peer-reviewed citations beyond IRENA’s own work, and the reliance on a single-year weather simulation and a simplified constant-demand profile limits the robustness of the findings. The discussion of fossil fuel comparisons uses plausible benchmarks but does not detail the specific assumptions for gas/coal costs. Overall, the title-content alignment is good and the sources are reliable within the institutional context.

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Title / Content Match

The title accurately describes the webinar's focus on the economics of firm solar and wind, introducing the firm LCOE metric.

Quality & Reliability

9/10

The webinar presents a rigorous, transparent methodology for calculating firm LCOE, backed by an official IRENA report. The speaker demonstrates technical depth and provides concrete examples across regions. Minor limitations: reliance on one-year weather data and simplified constant-demand assumption, but overall high reliability.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • 24/7 Renewables: The Economics of Firm Solar and Wind (full report) — Main report discussed in the webinar, introducing the firm LCOE concept and presenting the cost analysis.
  • IRENA Insights Webinar Series — Webinar series page where additional episodes and materials are available.

Contribution & Novelties

The webinar presents a novel metric—firm LCOE—that systematically adds battery storage, overbuild, and complementary generation to the traditional LCOE, enabling a consistent cost benchmark for round-the-clock renewable power. This is a valuable tool for project developers, policymakers, and corporate buyers. The analysis provides granular cost estimates across multiple countries and highlights the growing competitiveness of hybrid solar-wind-battery systems against fossil fuels. The presentation also identifies key cost drivers (resource quality, technology costs, weather patterns) and offers projections to 2035.

Pour aller plus loin :

  • Levelized cost of electricity — Foundational concept for understanding firm LCOE.
  • Grid energy storage — Overview of storage technologies and their role in firming renewables.
  • IRENA renewable power generation costs — IRENA’s annual cost reports providing baseline LCOE data used in the analysis.

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Radar Profile

The radar profile shows consistently high scores across all dimensions, indicating a well-balanced presentation with strong information quantity and quality, high technical depth, and excellent reliability. This reflects a rigorous institutional analysis with clear methodology and credible outputs.

Reliability 9/10