The Cost of Electricity

Item: The Cost of Electricity
Rating: 4
Author: PostSingularity Institute

Applied Sciences & Engineering Economics & Finance KNBEnergy industries and utilities KNBLElectrical power generation and distribution industries

🎙 Andrew Dessler 👥 336 📅 February 19, 2026 ⏱ 59 min 👁 223 📄 expert opinion 🧭 2026-08-16

Available in: English (current) Français

Keywords

merit stackmarginal pricingrenewablesbattery storageclimate change costs

Summary

Andrew Dessler, a climate scientist at Texas A&M, presents a talk on the cost of electricity, focusing on how renewable energy and battery storage affect wholesale electricity prices in deregulated markets like ERCOT (Texas) and CAISO (California). He explains the history of electricity markets, moving from regulated monopolies to competitive wholesale markets operated by Independent System Operators (ISOs). The core mechanism is the merit stack, where generators are dispatched in order of increasing cost, and the marginal generator sets the price for all. Renewables, with near-zero marginal cost, push expensive fossil fuel plants off the stack, lowering prices. Batteries charge when prices are low and discharge when high, providing savings by reducing the need for expensive peaker plants. Dessler’s analysis of ERCOT data shows that batteries saved consumers about $35/MWh in August 2025, while in CAISO the savings are offset by charging costs due to a flatter price-demand curve. He also discusses the impact of climate change, which increases demand and costs, and emphasizes that even when direct savings are not apparent, renewables and batteries reduce externalities like pollution and climate change. The talk concludes that while renewables and batteries provide significant benefits, climate change is simultaneously driving costs upward, and the transition to a cleaner grid is essential.

209 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into the functioning of electricity markets and the economic benefits of renewables and batteries. Dessler uses real market data from ERCOT and CAISO to support his arguments, quantifying the savings from batteries and the cost burden of climate change. The explanation of the merit stack and marginal pricing is clear and accessible, making complex concepts understandable. The argumentation is solid, though some conclusions are based on preliminary analysis and simplified assumptions, such as treating all fossil fuel generation as marginal. The speaker acknowledges these limitations and suggests future work. Overall, the talk offers a compelling case for the economic advantages of clean energy, backed by data and expert reasoning.

Scientific Rigor, Source Quality, Title Accuracy

The talk demonstrates scientific rigor by relying on market data and the speaker’s own research. Dessler cites specific data sources like ERCOT and CAISO, and his analysis is transparent. However, the research is not yet peer-reviewed, and some interpretations are preliminary. The title accurately reflects the content, focusing on the cost of electricity. The speaker’s credentials and experience add to the credibility. No external sources are cited beyond the market data, but the talk is based on original analysis. The title-content alignment is strong, and the talk is well-structured and informative.

220 words

Title / Content Match

The title accurately reflects the content, which focuses on the cost of electricity and how renewables, batteries, and climate change affect it.

Quality & Reliability

8/10

The talk is based on the speaker's own research and analysis of ERCOT and CAISO market data, providing quantitative evidence. The speaker is a professor at Texas A&M with a strong background in climate science. However, the analysis is presented as preliminary and not yet peer-reviewed, and some conclusions are based on simplified models.

Key Moments

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

Cited Sources

ERCOT Market Data — Used to analyze wholesale electricity prices and demand in Texas.
CAISO Market Data — Used to analyze wholesale electricity prices and demand in California.

Concurring Sources

ERCOT Market Data — Data used in the analysis.
CAISO Market Data — Data used in the analysis.

Contribution & Novelties

The talk provides a clear and data-driven explanation of how renewables and batteries affect electricity prices, using real market data from ERCOT and CAISO. It quantifies the savings from batteries and highlights the role of the merit stack and marginal pricing. The analysis of the different impacts in Texas and California offers insights into how market structure and battery capacity influence outcomes. The talk also connects these economic findings to the broader context of climate change, emphasizing the growing costs of extreme heat and the need for adaptation.

Pour aller plus loin :

Merit order effect — Explains the concept of merit order and how renewables lower prices.
Locational marginal pricing — Details the pricing mechanism used in wholesale electricity markets.
Energy storage — Overview of battery storage and its role in grid management.

134 words

Radar Profile

The radar profile shows high scores in quantity and quality of information, and moderate technical level, indicating a well-informed talk with some technical depth. The reliability is also high, reflecting the use of real data and expert analysis.

Reliability 8/10