Green Power Denmark Warns Nordic Grid Fragmentation Threatens Supply Security
Denmark's renewable lobby says Swedish and Norwegian reluctance on interconnectors risks price instability, even as day-ahead spreads tell a more complicated story.
Denmark DK1 day-ahead settled at €229.40/MWh in the session ending 2026-09-15, against Finland's €122.34/MWh in the same auction — a gap of more than €107/MWh that Green Power Denmark says illustrates exactly why the region needs more cross-border cable capacity, not less. The Danish renewable energy lobby told Montel that interconnectors are a prerequisite for securing supply, and that limiting them risks instability and bottlenecks across the Nordic system.3
The price wedge between DK1 and Finland reflects how quickly congestion translates into divergent costs for industrial users, retailers and generators operating across zone boundaries. When individual zones cannot move surplus power to deficit neighbours, the spread widens until demand adjusts or local generation picks up.3
Green Power Denmark's warning lands in a market already shaped by Sweden's decision, on Friday (2026-05-15), to pause planning for a new 1 GW electricity link with Denmark amid a dispute about proposed EU grid rules. The lobby said Stockholm was going in the "wrong direction." Sweden has not published a timetable for resuming the process, and Norway's government has shown similar hesitation on new interconnector projects.2
Kristian Ruby, head of Eurelectric, backed the lobby's position on Thursday (2026-05-21), calling the reluctance of Norway and Sweden to build new interconnectors a "problem" and arguing Europe needs a more integrated market. His comments carry weight as a pan-European signal, even if Eurelectric has no direct authority over national planning decisions.1
The counterargument from Stockholm and Oslo is well established in both countries' energy politics. New cables would expose their consumers to continental price spikes, particularly when gas-fired generation sets the marginal cost in Germany or the Netherlands. ICE Endex TTF front-month gas closed at €80.08/MWh in the session ending 2026-09-15, down 3.45%, and German power front-month fell 4.11% to €165.36/MWh. Those moves suggest some easing on the continental side, but Nordic politicians with long memories of price volatility tend not to weight a single session's moves heavily.1
Norway NO2 day-ahead cleared at €187.22/MWh in the same session — the highest Nordic zone quoted in the data — pointing to continued tightness in the southwest Norwegian bidding area rather than a uniform crisis across the region. Denmark DK2, covering the island of Zealand and connecting directly to Sweden, settled at €204.79/MWh. The roughly €25/MWh spread between DK1 and DK2 reflects congestion on the Great Belt link rather than a shortage of aggregate cross-border capacity, which complicates Green Power Denmark's argument that the problem is purely one of political reluctance to build new cables.3
Demand is not standing still. A surge of new hyperscale data centres across the Nordic region is running into grid access constraints, with analysts noting in the week of 2026-08-24 that limited grid capacity is forcing politicians to prioritise accessibility. The buildout was drawn north by cheap, largely renewable power — but if that power cannot reach the data centres reliably because of congestion, the economics of the region's attraction weaken.4
If new interconnector projects are shelved and data centre load keeps growing, existing infrastructure absorbs both effects simultaneously. Price spreads between zones with surplus generation and zones with load growth would widen further. Reliance on the few continental links already in service would increase, exposing the Nordic market to exactly the price swings that Oslo and Stockholm say they want to avoid.4
Green Power Denmark's complaint also has a security-of-supply dimension beyond pricing. A less connected system has fewer rerouting options when a large generator or transmission line goes offline, whether for planned maintenance or an unplanned fault. That argument carries more weight in a region where weather-dependent hydro and wind make output volatile by nature.3
Eurelectric has publicly endorsed deeper integration, but the decision rests with Sweden's energy ministry and Norway's grid operator Statnett, whose investment planning cycle will ultimately determine whether a new Denmark link advances. Neither government has indicated the pause on the 1 GW project will be lifted soon, and Green Power Denmark has not indicated whether it will escalate its lobbying beyond public statements to Montel.2
A revised Swedish timetable for the Denmark link, or a new Statnett cross-border project submission, would be the clearest signal that political sentiment is shifting. Absent either, the zone spreads visible in Tuesday's (2026-09-15) auction data will continue to reflect congestion that the region's lobby groups say new cables could relieve — and that governments in Stockholm and Oslo show little urgency to address.2