System inertia - what is it?
System inertia is needed to take care of deviations in the electrical system, and gives a little extra time to deal with sudden frequency drops. The system inertia is created when the power plants' large generators are running. It is primarily our nuclear and hydropower plants that contribute system enertia. Watch our video to learn more:

We ensure Sweden has baseload power
As a part of the international energy group Uniper, we in Sweden are a major electricity producer for the Swedish base industry, with powerplants around the country for climate-smart hydro and nuclear power in addition to reserve power. Our powerplants play an important role in stabilizing Sweden’s electricity supply, which is the foundation for society’s welfare and industry’s competitiveness.
Powerplants in Sweden
Country | Installed capacity | |||
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Barsebäck | Sweden | 0MWe | |
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Hydro powerplants in Sweden | Sweden | - | |
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Karlshamn | Sweden | 662MWe | |
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OKG | Sweden | 1400MWe |