Articles
Evidence-led pieces on electricity grids and energy data from Sustainable Digital Assets.
Grid data · Nordic
Nordic grid’s low-inertia hours nearly quadrupled versus 2025
The rotors that keep spinning inside generators help steady the grid when a large power source suddenly disconnects. From January to 26 September 2026, the Nordic grid had far more hours with a low reading of that stored motion than in the same period of 2025. Finland’s grid operator had booked a rapid reserve for about three in four of those 2026 hours.