Black Sea Regional Energy Center
Provides projects, studies and Black Sea energy review, events and newsletters.

DIT-M Bulgaria
Diagnostics, repairs and modernization of power and auto transformers, high voltage outlets up to 400 kV, step regulators, analysis of power efficiency of enterprises, consulting and engineering.

Elia Plc Bulgaria
Specialized in design, development, manufacturing and maintenance of electrical systems for power networks, industrial plants and commercial buildings.