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The High-Carbon Truth Behind A ‘Green’ California Microgrid - CleanTechnica

The High-Carbon Truth Behind A ‘Green’ California Microgrid - CleanTechnica
Source: cleantechnica
Author: @cleantechnica
Published: 8/12/2025

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The article from CleanTechnica critically examines a California microgrid project in Calistoga, intended as a wildfire resilience measure using hydrogen fuel cells to provide local power during outages. While the project is promoted as a clean alternative to diesel generators, the hydrogen fuel used is sourced from a grid-connected electrolyzer in Georgia, where electricity generation has a relatively high carbon intensity. Producing, liquefying, and transporting the hydrogen over 2,800 miles results in substantial CO2 emissions—estimated at about 23.6 kg of CO2 per kilogram of hydrogen delivered. When converted back to electricity in California, the carbon intensity of the power generated is between 1,400 and 1,600 grams of CO2 per kWh, far exceeding California’s grid average and even worse than modern diesel generators. The article questions the rationale behind public funding for such a high-carbon, inefficient solution, highlighting that state and federal programs, along with utility ratepayer funds, are supporting systems that increase rather than

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energymicrogridhydrogen-fuel-cellcarbon-emissionsrenewable-energyenergy-efficiencyclean-energy