Grid Brief https://gridbrief.org/ Energy and the grid, read from the primary documents en Sun, 20 Sep 2026 15:30:25 +0100 US retail diesel hits $6.29 a gallon, a record in nominal terms https://gridbrief.org/news/markets/us-diesel-price-record-crack-spreads/ https://gridbrief.org/news/markets/us-diesel-price-record-crack-spreads/ Sun, 20 Sep 2026 15:30:25 +0100 Refining margins, not crude alone, are carrying the increase. EIA's breakdown shows where each dollar at the pump is going. NSW firming tender finishes with 3GWh of batteries operating https://gridbrief.org/news/storage/nsw-firming-tender-round-two-complete/ https://gridbrief.org/news/storage/nsw-firming-tender-round-two-complete/ Sun, 20 Sep 2026 15:30:25 +0100 Four projects, AU$1.8 billion, and roughly 8% of the state's summer peak - all of it batteries, none of it gas. ACER faults Portugal's adequacy study over its assumptions https://gridbrief.org/news/policy/portugal-adequacy-two-models/ https://gridbrief.org/news/policy/portugal-adequacy-two-models/ Sun, 20 Sep 2026 14:42:16 +0100 Europe's assessment finds no problem in Portugal. The national one finds a shortfall growing fiftyfold by 2035. ACER's opinion is about the modelling, not the lights.