# Mochovce 4 begins supplying first electricity to Slovakia’s grid

> Slovenské elektrárne synchronized the first of Mochovce nuclear plant’s two Unit 4 turbine generators with Slovakia’s transmission grid on 15 October. The reactor was operating at 20% power as it delivered its first megawatt-hours.

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- Publisher: Newsverum
- Section: Energy
- Country: Slovakia
- Published: 2026-10-21T15:31:12+00:00
- Updated: 2026-10-21T15:31:12+00:00
- Event / data period: 2026-10-15
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The milestone does not mean the unit has entered full commercial operation. The company said the second generator will be synchronized later and that safety and control systems will undergo staged tests as output rises toward nominal capacity.

## Data

### Unit 4 capacity

Installed electrical capacity reported by the source.

Methodology: Installed capacity is reported by the source; no calculation added.

| Measure | Value (MW) |
|---|---|
| Installed electrical capacity | 471 |

Sources: <https://www.epgroup.eu/en/press-releases/eph-welcomes-first-electricity-supply-from-mochovce-unit-4-strengthening-slovakias-energy-security> · Download data: [JSON](https://newsverum.com/api/v1/articles/mochovce-unit-four-begins-grid-electricity-delivery-in-slovakia/data/release-data?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/mochovce-unit-four-begins-grid-electricity-delivery-in-slovakia/data/release-data?lang=en&format=csv)

## Sources

- [EP Group (EPH)](<https://www.epgroup.eu/en/press-releases/eph-welcomes-first-electricity-supply-from-mochovce-unit-4-strengthening-slovakias-energy-security>) (Source checked: 2026-10-21; Published: 2026-10-16)

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