A green hydrogen microgrid is a small - scale, self - contained energy system that combines green hydrogen production, storage, and utilization with microgrid technology. It usually uses renewable energy sources, such as solar or wind power, to generate electricity, and then uses this electricity to produce green hydrogen through electrolyzers. The hydrogen can be stored in hydrogen storage devices, and when the power supply of renewable energy is insufficient, the hydrogen is used in fuel cells to generate electricity, providing stable power support for the microgrid. For example, the Calistoga Resiliency Center in California is a hybrid long - duration energy storage and green hydrogen microgrid facility, which integrates green hydrogen fuel cells and lithium - ion batteries. It can provide grid stability and backup power for up to 48 hours during outages, and is the largest utility - scale green hydrogen energy storage project in the U.S..
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