A fire in GRIDCo's control room shut down the Akosombo plant and took three substations offline

A fire broke out at a GRIDCo control facility near the Akosombo Generating Station on 23 April, forcing a full shutdown of the 1,020 MW hydroelectric plant as a safety precaution. Three substations — Kasoa, Mallam, and Asiekpe — were also taken offline as part of the grid contingency response.

A source familiar with the situation said the fire originated in the control room building, not in switchyard equipment. Firefighters and technical teams were deployed. A GRIDCo management retreat was closed early and staff were redirected to the System Control Centre to coordinate the grid response.

GRIDCo has not named a cause, reported any casualties, or set a restoration timeline.

Why this matters

Akosombo is Ghana's largest power station. Operated by the Volta River Authority, its six 173.1 MW Francis turbines historically supplied 80 to 85 percent of the country's electricity. Post-reform and with the thermal mix expanded, it still generates over half of Ghana's power in most periods. A full shutdown of Akosombo is a major grid event regardless of cause.

The timing makes it worse. ECG Acting Managing Director Kwame Kpekpena issued a public apology on 20 April over ongoing outages across Accra, Ashanti, Western, and Volta regions. Scheduled maintenance outages were planned for 23 April, with Tema expected to be the hardest hit. The government has procured 2,500 transformers for nationwide replacement. President Mahama said on 19 April that the recent outages "do not signal a return to dumsor" and were tied to the upgrade programme.

A fire at Akosombo on 23 April makes that reassurance harder to defend. Whether the control room fire is connected to the broader infrastructure strain or is a standalone incident is the question GRIDCo will need to answer quickly.

GRIDCo, incorporated in 2006 and operational since 2008, runs Ghana's National Interconnected Transmission System. It secured a $60 million EBID loan in 2025 for transmission line upgrades and is currently decommissioning and upgrading the Afienya substation under a separate five-week project.

The last comparable Akosombo event was the 2023 controlled spillage that forced an emergency shutdown of the Sogakope substation and displaced approximately 35,857 people. A prior control-room fire of this scale is not in public record.