References
Substations and switching stations up to 400 kV, overhead and cable lines, battery parks from 10 to 150 MW, photovoltaic plants, industrial buildings — for ESO EAD, the distribution companies and leading renewable investors.
Key projects
Complex turnkey energy facilities — from design to energisation.
Supply and construction across three sub-projects: an MV/400 kV substation with a cable duct, a 400 kV switching station connecting a generation, storage and consumption facility, and reconstruction of the “San Stefano” 400 kV line. Main contractor. 400 kV
A 150 MW / 601.70 MWh battery system, a 110/20 kV step-up substation and a 110 kV cable line with fibre-optic cable to the “Burgas” 400/110/31.5/20 kV substation, Balgarovo. Main contractor. 150 MW / 601.7 MWh
A new “Rozhen” 20/110 kV substation, a new “Rozhen” 110 kV line with OPGW / OPUG to the “Smolyan” 110/20 kV substation, a new 110 kV bay and switchyard reconstruction, a 320 MWh battery system — on mountain terrain and to a tight schedule. Turnkey main contractor. 320 MWh
BESS 65.55 MW / 154.77 MWh connected to the operating energy facility of Vetrokom EOOD — integrating storage with a running wind farm without interrupting generation. 65.55 MW / 154.77 MWh
Design and construction of two 33/110 kV step-up substations with equipment supply, an external 110 kV cable connection and new line bays in ESO’s “Kameno” and “Brusartsi” substations — in partnership with Futura Systems EOOD. 2 × 33/110 kV
Kaliakra, Kavarna, Trastikovo 1 and 2, Staro Oryahovo, Dalgopol Storage Park and Energy Park — one technical design for fast, repeatable delivery, with a new 20 kV cable line and fibre-optic cable. All commissioned in August 2026. 7 × 10 MW / 40 MWh = 70 MW / 280 MWh
Stage 1 — 60 MW / 240 MWh; stages 2 and 3 (50 MW / 200 MWh and 75 MW / 300 MWh) under construction. Like all our battery parks — on foundations of our own production. Together, over 185 MW / 740 MWh of new capacity next to “Tenevo Solar”. > 185 MW / 740 MWh
Design, supply and construction of a rooftop PV system with battery storage on an industrial building on Kuklensko Shose St. — self-generation and consumption optimised through local storage. 1,132 kWp / 2,120 kWh
110 kV switchyards at “Iskar Industria”, “Aldomirovtsi”, “Zlatograd”; 20 kV bays at “Hristo Smirnenski”; a new control building at Plovdiv CHP; “Stolnik” and “Trakia” — from dismantling worn equipment through new steel structures and earthing to installation and energisation, without compromising grid reliability. 110 – 220 kV
Under construction
New large projects in Bulgaria and Romania, including full design-and-build scope.
We build the external connection only: a 33/400 kV step-up substation with a 350 MVA transformer, the new 23.6 km “Gabare” 400 kV line and a new 400 kV bay at ESO’s “Mizia” substation. Design and construction of the external connection; equipment supply is in the client’s scope.
A 33/110 kV step-up substation and battery park in Isalnita, Romania. Partial design and full construction works, on our own foundations made in Bulgaria and approved under Romanian legislation.
Connected to the transmission grid through a new 33/110 kV step-up substation, a 110 kV cable line and a new bay at an ESO 110 kV substation. Full EPC scope — from design to commissioning.
Full list
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