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The RSP assesses the types of projects needed over the next 10 years, but it is not a proposal to build specific projects.
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The ISO’s annual report shows emissions have dropped considerably over the last decade.
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The study finds that building a variety of technologies will be key to meeting state emissions goals reliably and cost-effectively.
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The total estimated wholesale market cost of electricity for spring 2025 was $1.64 billion, an increase of 48% compared to spring 2024.
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Prepared by the Internal Market Monitor, the document offers a plain language overview of the region's wholesale electricity markets.
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Two projects were proposed since March 2025, according to the latest update to the Regional System Plan Project List.
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At 28° Fahrenheit, the average winter temperature was six degrees colder than winter 2023/2024 and the coldest since winter 2014/2015.
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The region’s wholesale electricity markets performed well and were competitive in 2024, the report found.
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New tools give system planners greater insight into solar power and battery systems that reduce demand for grid electricity.
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The information aids the ISO’s long-term planning efforts, policymakers, and participants in the region’s wholesale electricity markets.
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