Slovakia's Mochovce Unit 4 Begins Supplying Power to National Grid
On October 15, the fourth reactor at the Mochovce plant delivered electricity to Slovakia’s grid for the first time, operating at 20% capacity.
Slovenske elektrarne announced that the fourth unit of the Mochovce nuclear power plant fed electricity into the Slovak grid on October 15 at 20:41, with the reactor operating at 20% of its capacity. The unit’s first turbogenerator was synchronized, while the second remains to be connected and tested under the Nuclear Regulatory Authority’s supervision. When fully operational, the 471 MW reactor will supply about 13% of national consumption, producing roughly 3.5 TWh per year, and is slated to reach full power by 2027.
The €6.7 billion investment, one of the largest private projects in Slovakia, was delayed by two days after a technical test required repetition, postponing Prime Minister Robert Fico’s planned attendance. Completion also triggers a state option, dating from a 2015 memorandum with former co-owner Enel, to acquire an additional 17% of SE, potentially restoring majority state ownership. The remaining 66% of SE is held by the Czech energy group EPH, owned by Daniel Kretinsky. Unit 4 is a Soviet-designed VVER-440 reactor, whose fuel supply ties have historically linked operators to Russian sources.
Why it matters
The new reactor adds roughly 13% of Slovakia's electricity, strengthening energy security and supporting its goal of becoming a net exporter.
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