Bulgaria's first battery energy storage project developed in cooperation with Tesla has officially begun construction in Tvaldica, a town in Sliven Oblast. The groundbreaking ceremony was attended by Bulgarian Prime Minister Rumen Radev, Energy Minister Eva Petrova, Innovation and Digital Transformation Minister Ivan Vasilev, investors and Tesla representatives.
Phase 1: 300 MWh over five hours
The first phase is a five-hour duration energy storage system with an installed capacity of 300 MWh, equipped with 80 Tesla Megapack 2XL energy storage units and 20 Tesla transformers. Commercial operation is planned for the second quarter of 2027.
The five-hour configuration places the project firmly in the shifting-duration segment of the European BESS market, where systems are sized not only for frequency and balancing duties but also for shifting large volumes of midday solar output into evening peaks.
A three-project pipeline above 2,300 MWh
Tvaldica is the first of three energy storage sites planned in collaboration between Asarel Trade, Power Profit and Tesla. The combined storage capacity of the three projects exceeds 2,300 MWh, with total investment of over EUR 350 million.
Whoever possesses stable and sustainable energy storage construction capabilities holds the key to the future of the energy industry.
That framing, from Prime Minister Rumen Radev, reflects how storage has moved from ancillary technology to a strategic infrastructure category in Bulgarian energy policy. He added that, in terms of the proportion of battery energy storage capacity relative to the size of the country's power system, Bulgaria has become one of the top in Europe, and that modern energy storage infrastructure has become a prerequisite for economic growth.
Tesla's European footprint
Tesla's larger European announcements — a 25 GWh NatPower agreement in the UK and an approximately 3 GWh Zhero agreement in Italy — are currently framework agreements, whereas the Tvaldica project in Bulgaria is a tangible project under actual construction. For the EU market, that distinction matters: Bulgaria is where Megapack capacity is being physically installed on a scheduled timeline, with a concrete commercial operation date.
Energy Minister Eva Petrova said the Ministry of Energy will continue to improve regulatory policy for energy storage, consolidate the country's strategic advantages, and simultaneously promote new power sources and pumped storage projects to create an investment-friendly environment for foreign capital and technological innovation.
Source: Seetao (seetaoe.com)
This article was assisted by AI analysis. Please refer to the original source for official information.