Wamba (Castilla y León) / 2025-12-18 – Eiffage Energía Sistemas has taken on the engineering, procurement and construction (EPC) delivery of two major photovoltaic plants in the municipality of Wamba: Valle 3 and Valle 4. The combined capacity of roughly 330 MWp places these projects among the largest photovoltaic developments currently under construction in Spain.
The projects in Wamba are being executed under EPC contracts that cover end-to-end delivery: detailed design, equipment procurement, civil works, mechanical and electrical installation, and grid connection interfaces. Publicly available project notes point to ongoing earthworks, structural installation and substation assembly as primary activities on site.
Technical scope and significance
At ~330 MWp combined, Valle 3 and Valle 4 represent substantial single-site scale for non-utility-owner-led complexes. EPC scope typically includes supply chains for PV modules, inverters, mounting systems (likely single-axis trackers for optimized yield), BOS components, and the construction of the medium-voltage substation required for evacuation.
Operational impact
While specific commissioning dates and offtakers were not disclosed in the sources consulted, a 330 MWp solar complex in Castilla y León could generate several hundred GWh annually depending on local irradiation and capacity factor — contributing meaningful output to Spain's grid and to potential PPAs. The projects also underscore the importance of reliable EPC delivery to secure schedule and cost targets.
Project challenges and market considerations
- Supply chain and logistics: ensuring timely delivery of modules, inverters and metalwork remains a critical risk for large-scale EPCs.
- Grid export capacity: full value realization depends on substation capacity and network reinforcements; grid congestion can limit dispatch.
- LCOE and O&M strategy: construction quality, tracker deployment, and an optimized O&M plan will directly affect levelized cost of energy and long-term project economics.
Market context
Spain's utility-scale solar pipeline continues to expand, putting pressure on EPC contractors to scale operations while managing costs and timelines. Contractors like Eiffage Energía Sistemas that offer integrated EPC solutions are well positioned to capture a significant share of this activity.
Sources and verification
Project details regarding the Wamba location and the aggregated 330 MWp capacity are available through Eiffage Energía Sistemas' public materials and sector reporting. Energías Renovables flagged the involvement of Eiffage in two of the largest solar plants under construction in Spain, corroborating the strategic relevance of the works.
Conclusion
Eiffage's EPC execution of Valle 3 and Valle 4 is emblematic of Spain's push to scale solar at utility scale. Execution effectiveness, supply-chain resilience and grid integration will determine whether these plants deliver the expected energy, financial returns, and climate benefits.
