Electricity prices can become negative due to grid oversupply

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Wholesale electricity prices can indeed drop below zero when grid oversupply occurs, driven by high generation from inflexible or low-marginal-cost renewable sources during periods of low demand.

The analysis

The retrieved papers consistently confirm that negative wholesale electricity prices are a well-documented phenomenon caused by grid oversupply, particularly when high production from renewables (wind and solar) coincides with low electricity demand. Multiple sources directly attribute negative pricing events to supply exceeding demand and regional overcapacity.

Evidence for · 3

Plentiful electricity turns wholesale prices negative

Recorded source metadata

J. Seel, D. Millstein, A. Mills, M. Bolinger, R. Wiser. Plentiful electricity turns wholesale prices negative. 2021. https://doi.org/10.1016/j.adapen.2021.100073

The study explicitly states that negative electricity prices result from system-wide oversupply or local transmission congestion where supply exceeds demand.

Source citation format

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More for · 2

Ever More Frequent Negative Electricity Prices: A New Reality and Challenges for Photovoltaics and Wind Power in a Changing Energy Market—Threat or Opportunity, and Where Are the Limits of Sustainability?

Recorded source metadata

Marek Pavlík. Ever More Frequent Negative Electricity Prices: A New Reality and Challenges for Photovoltaics and Wind Power in a Changing Energy Market—Threat or Opportunity, and Where Are the Limits of Sustainability?. 2025. https://doi.org/10.3390/en18102498

The article notes that negative electricity prices have become a recurring reality in markets experiencing rapid expansion and oversupply of renewable energy sources like wind and solar.

Source citation format

Electricity contract design and wholesale market outcomes in Australia's National Electricity Market

Recorded source metadata

Tim Nelson, S. Easton, Lewis Wand, Joel Gilmore, Tahlia Nolan. Electricity contract design and wholesale market outcomes in Australia's National Electricity Market. 2024. https://doi.org/10.1111/1467-8489.12588

The paper discusses how excess energy generation and supply imbalances push wholesale prices down into negative pricing territory.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8801 Aug 2026

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