Ten villages in the Elhovo region entered their second week without electricity on December 8 after power lines froze.
Bulgarian National Television reported that the supply system infrastructure was in rough terrain and removing and replacing it proved to be too difficult for system operator NEK.
The new materials were delivered five days ago, but transportation and installation remained a problem, Belogradchik mayor Boris Nikolov said, even though equipment had been brought in from Kozloduy nuclear power station and a private company.
Replacement of this kind had not been done for 40 years.
The report said that it was difficult to say when the villages, in the Belogradchik area, would have electricity.
People in the village of Kireevo and part of the village of Rakovitsa in Makresh municipality were in their eighth day without power, but equipment had been delivered and it was expected that electricity supply would be resumed by the evening of December 8.