Excess power is unevenly distributed both geographically and temporally.
In the SE1 region, which is the least populated and probably best candidate for a data center, there was a 400% price drop between February and March this year, then up 100% in May, then down 50% in July. Between summer 2025 and winter 2026, the same region saw a price hike of nearly 1000%.
https://data.nordpoolgroup.com/auction/day-ahead/prices?deli... 12¤cy=EUR&aggregation=MonthlyAggregate&deliveryAreas=SE1,SE2
https://data.nordpoolgroup.com/auction/day-ahead/prices?deli...
I guess if you want a data center that only operates some months of the year that's fine.