Category: Research
Power Systems Have More Flexibility Plans Than Flexible Grids
Grid flexibility is easy to mistake for a technology market. One jurisdiction announces several gigawatt-hours of batteries, another creates a new ancillary-service product, and a third launches a capacity auction, pumped-hydro program or demand-response target. Those are meaningful signs of activity, but they do not answer the harder question: can … [continued]
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Supercritical CO₂ Is Useful. The System Claims Are The Problem.
Supercritical carbon dioxide is genuinely useful stuff. Above roughly 31° Celsius and 73.8 bar, CO₂ enters a state that combines gas-like flow behavior with densities that can become much closer to liquids. Engineers have found good uses for that combination. It can extract caffeine from coffee, separate valuable compounds from … [continued]
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U.S. Battery Storage Capacity Averaged 70% Growth Over The Last Three Years
Utility-scale battery storage capacity in the United States increased significantly during the last three years, with an annual average growth rate of 70%. By the end of 2025, the U.S. power system had operational battery storage capacity of 43.6 gigawatts (GW). During the first six months of 2026, operators added another 8.3 … [continued]
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Europe’s 700-Bar Hydrogen Network Is Closing And Reappearing
Europe’s public hydrogen refuelling network is not growing, but shrinking slightly. It is, however, changing shape. The part built for passenger cars is shrinking, while a new generation of dual-pressure stations is carrying 700-bar capability forward into the bus and truck layer. Germany closed 36 first-generation hydrogen refuelling stations during … [continued]
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Ember’s Electric Coaches Show Intercity Bus Electrification Is Already Here
Edinburgh makes electric transit visible. The city has electrified regional rail, trams and a growing number of electric buses, including large battery-electric double-deckers that stand out from the pavement. That progress is important, but it is not especially surprising. Urban buses were always expected to be among the first heavy … [continued]
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