Europe is racing to add very large grid batteries to balance rising wind and solar output. As of mid–late 2025, four utility-scale Battery Energy Storage System (BESS) projects stand out by size — each designed in the 0. 8 GWh class and backed by reputable developers and public. [BYD Eastern Europe Energy Storage Project put into operation] On January 29, 2026, BYD's 500MWh energy storage project in Bulgaria, in collaboration with European companies, was officially put into operation, making it the largest standalone energy storage project in Eastern Europe. The project. Chinese vertically integrated lithium-ion (Li-ion) battery manufacturer Hithium focuses on the stationary battery energy storage system (BESS) space exclusively. The company announced the deal with Solarpro, a subsidiary of Austrian clean energy investor Renalfa Solarpro Group, yesterday (25. The Chinese company strengthens its presence in the European large-scale storage market through a strategic partnership in the Baltic countries, the deployment of Elementa 2 and the next generation of high energy density systems. PV Europe predicts a fivefold market expansion by 2030. Author: Portland General Electric. License: Creative Commons.