Welion New Energy has successfully delivered a 0.5MW/1.5MWh energy storage project in Egyházasharaszti, Hungary, marking another step forward for the company's semi-solid-state battery technology in the European market.

The project, which has recently completed delivery, represents a notable expansion of Welion's presence in Europe's energy storage sector. The system is designed to support local grid stability and renewable energy integration, with a particular focus on photovoltaic (PV) co-location and ancillary service provision.

At the core of the installation is Welion's self-developed Spower II 522kWh semi-solid-state energy storage cabinet. The unit utilises advanced semi-solid electrolyte technology, which enhances intrinsic battery safety and reduces the risk of thermal runaway—a key consideration for European project developers and operators. Its high-energy-density architecture allows for greater storage capacity within a compact footprint, addressing land-use constraints commonly found in the region.

The system pairs the battery cabinet with Inpower PCS cabinets, which provide efficient power conversion and rapid grid response. This configuration ensures stable coordination between the storage system, PV generation, and the wider electricity network, enabling both smooth energy dispatch and grid-support functions.

On-site imagery shows white storage containers arranged in neat rows between PV arrays, forming a clear "PV-storage integration" layout. The system is designed to address the intermittency of solar resources in the Egyházasharaszti area by smoothing output fluctuations and shifting excess generation from peak sunlight hours to periods of higher demand or evening consumption. The 1.5MWh capacity is sufficient to support meaningful time-shifting, improving the overall economics of the PV station.

Beyond basic load-shifting, the project is also positioned to participate in Hungary's capacity market and provide Frequency Restoration Reserve (FRR) services. The Spower II cabinet's rate capability, combined with the fast-responding Inpower PCS, enables millisecond-level reaction to grid frequency deviations. This allows the asset to generate capacity payments and capture additional revenue streams through ancillary service markets—a feature that enhances the commercial viability of storage investments in liberalised European power markets.

The Hungarian delivery comes as European energy buyers and grid operators place increasing emphasis on battery safety, life-cycle costs, and environmental performance. Welion's semi-solid-state approach offers an alternative to conventional liquid-electrolyte lithium-ion systems, addressing safety concerns while maintaining competitive energy density. For project developers, this translates into reduced fire-risk mitigation costs and potentially lower insurance premiums over the asset's lifetime.

As Europe's energy transition gathers pace, storage systems capable of delivering both renewable integration and grid-stabilising functions are becoming essential infrastructure. Welion's ability to execute a project of this scale in Hungary—complete with PV coupling and FRR readiness—suggests that semi-solid-state technology is moving from pilot demonstrations toward commercial deployment in demanding grid environments.

With this project now operational, Welion New Energy continues to build its reference portfolio in Central Europe. The company has indicated that it will pursue further opportunities across the continent, leveraging its semi-solid-state platform to meet growing demand for safe, high-performance storage solutions. For the Hungarian site, the immediate focus remains on optimising dispatch strategies and validating the long-term performance of the system under real-world operating conditions.