Sungrow, along with its partner Sunotec, has commissioned a 150MW/600MW-hour (MWh) battery energy storage system (BESS) in Nova Zagora, Bulgaria.
The project was developed and is owned by Enery, an independent power producer active in central and eastern Europe (CEE).
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It makes use of Sungrow’s PowerTitan 2.0 liquid-cooled energy storage system and received funding from the Bulgarian Ministry of Energy’s national RESTORE programme.
The facility is said to be one of the largest battery storage systems in Bulgaria.
It is intended to support grid flexibility, help the integration of renewable power and improve the resilience of the national power system.
The commissioning marks the first key milestone in an ongoing collaboration between Sungrow and Sunotec.
The collaboration is planning up to 800MWh of battery storage capacity in the Nova Zagora region, with further expansion up to 1GW-hour (GWh) currently under consideration.
Sunotec founder and CEO Kaloyan Velichkov said: “Together with Sungrow, we are advancing one of Bulgaria’s most significant storage programmes to support the country’s transition towards more resilient energy deployment.
“By combining infrastructure and execution with long-term systems thinking, we are helping to future-proof Bulgaria’s energy grid. This is exactly where our integrated approach creates value.”
Over the next two months, Sungrow and Sunotec expect to bring a total of 2.2GWh of battery storage capacity online in Bulgaria.
By the end of 2026, the partners aim to reach 3GWh of installed storage capacity in the country.
The partners’ project pipeline in Bulgaria also includes Knizhnovik phase one, a hybrid battery storage and photovoltaic (PV) installation with a capacity of 100MW/200MWh, developed by Enery.
Sungrow Europe responsible for SEE, CEE & CIS vice-president Anastasios Gkinis said: “This project reflects the pace at which storage is becoming integral to energy systems in south-east Europe.
“With PowerTitan 2.0, we are delivering a solution that supports grid stability while helping unlock the next phase of clean energy deployment.”
Sungrow’s PowerTitan 2.0 liquid-cooled energy storage system has been deployed for the Nova Zagora project.
The technology uses a compact design to maximise land efficiency and enable faster installation.
Last month, Sungrow and Masdar signed an agreement for the supply of energy storage and PV inverter technologies to support a gigascale round-the-clock renewable energy project in Abu Dhabi, United Arab Emirates.
