Ukraine has launched a network of battery systems aimed at preventing prolonged power outages in the event of Russian attacks on its energy facilities. According to the Wall Street Journal, these batteries are strategically placed in undisclosed locations.
The American company Fluence has supplied the battery systems, which are capable of sustaining the power grid for a limited time during damage caused by attacks.
The WSJ reports that the cost of implementing this secret battery network is approximately $140 million, and the program was completed in August of this year.
Six facilities in Kyiv and the Dnipropetrovsk region are already supplying electricity to the grid when other sources are compromised.
The total capacity of these secret battery parks is reported to be 200 MW, with the ability to store up to 400 MWh of electricity, sufficient to power 600,000 households for two hours. Each unit can be replaced if damaged with no effect on the rest of the system.
To prevent enemy forces from targeting the battery parks, Ukraine keeps their locations and protection measures, such as air defense systems, confidential, the publication adds.

Additionally, it was previously reported that "Zaporizhzhiaoblenergo" would receive 630 million from the state budget's reserve fund for the construction of protective structures.
The Cabinet of Ministers has changed public procurement rules during wartime to allow "Ukrenergo" to complete the construction of protective facilities at substations.
On October 3, Russian forces carried out a massive attack on Ukraine's gas extraction infrastructure.