CATL to supply Spanish BESS projects

CATL will supply around 1.5GWh of battery energy storage equipment for two Grenergy projects in Spain, supporting the Oviedo standalone BESS and the Escuderos solar-plus-storage scheme.

The order covers 252 lithium iron phosphate-based Tener Stack battery units. The equipment will be deployed across the Oviedo and Escuderos projects, which are due to move toward operation in 2027. Oviedo is a standalone storage project of around 700MWh, while Escuderos combines solar generation with around 680MWh of battery capacity.

The two projects form part of Grenergy’s wider European storage and renewables strategy. The use of CATL’s stackable LFP system reflects a focus on energy density, modular deployment, and site-level configuration as developers seek to fit larger storage capacities into available land and grid-connection envelopes.

Spain’s storage market is moving from early-stage opportunity toward a more concrete project pipeline. High solar penetration, volatile intraday generation profiles, and grid-balancing requirements are strengthening the commercial case for batteries. Storage can shift renewable generation, reduce curtailment, support trading, and provide flexibility services, provided market design and grid access allow assets to operate across multiple value streams.

The Oviedo and Escuderos projects also show the different roles batteries are beginning to play in European systems. Standalone BESS can operate as a flexible grid asset, responding to wholesale price spreads, balancing requirements, and system needs. Hybrid solar-plus-storage schemes can improve renewable export profiles, capture generation that might otherwise be curtailed, and support more controlled connection use.

Across Europe, storage value is increasingly shaped by connection location, duration, cycling strategy, software control, degradation management, grid-service eligibility, and commercial structure. Tolling arrangements, merchant exposure, and long-term offtake models are all being used to manage risk as the market matures.

The wider build-out described in European BESS pipeline advances across 3.3GWh showed battery projects moving forward across Italy, Romania, Germany, Poland, Denmark, Montenegro, and Moldova. The Spanish schemes add further evidence that storage is becoming a core grid technology rather than a niche addition to renewable portfolios.

Equipment supply is one of the main practical issues behind that build-out. Battery systems must be procured alongside inverters, transformers, switchgear, protection systems, control platforms, fire safety systems, civil works, grid connection equipment, and long-term service arrangements. Developers are also managing technology risk as cell chemistries, container designs, thermal management systems, and battery management software continue to evolve.

LFP chemistry has become a common choice for stationary storage because of its safety profile, cycle life, and cost characteristics. System design still requires careful thermal management, access planning, fire strategy, and maintenance provision. Larger projects must also meet grid-code requirements and operate through control architectures capable of responding to market and system signals.

Spain’s power system creates a strong operating case for batteries. Solar output can create low-price periods and curtailment risk, while evening demand and reduced solar generation create opportunities for dispatch. Battery economics will depend on how effectively projects can stack revenues without excessive cycling, accelerated degradation, or underused connection capacity.

The CATL-Grenergy agreement therefore reflects a European storage market moving from concept pipelines into equipment orders, financing structures, and delivery schedules. As more projects reach construction, the focus will shift from announced gigawatt-hours to commissioning performance, grid-service participation, and long-term operating discipline.