Its role Investor / Financier
Alter Enersun SA is a Spanish renewable energy company headquartered in Badajoz, Extremadura. Founded in 2009, it operates as an independent power producer (IPP) specializing in the full lifecycle of photovoltaic solar projects, including development, design, promotion, financing, installation, operation, maintenance, and asset acquisition.
The company focuses on utility-scale and rooftop solar installations, battery energy storage systems (BESS), and green hydrogen initiatives to support decarbonization. It maintains a portfolio of over 150 PV plants across Spain (with emphasis on Extremadura and Andalusia), Italy, and Portugal, aiming for more than 1,000 GWh annual generation capacity. Alter Enersun enters into long-term power purchase agreements (PPAs) with industrial clients, including those in the metallurgical and chemical sectors, and participates in joint ventures such as Enalter for renewable solutions.
It belongs to the Alter Enersun Group, which integrates Alter Enersun (generation), Alterna Energía (technical solutions and self-consumption), and Max Energía (energy commercialization). The group is participated by CL Grupo Industrial (Cristian Lay) and Senergy Group (Seu Global Energía). With over 15 years of experience, the company contributes to Spain's renewable energy transition through projects involving significant investments and local economic impact.
Also known as Grupo Alter Enersun and Alter Enersun Group.
chemXplore tracks 1 project involving Alter Enersun, of which one is active.
First phase delivers 300 MW (option +105 MW), ~45,000 tH2/yr, >€1bn phase investment, €304m public support and an expected >8,000 jobs across the value chain.
First phase includes a 300 MW electrolyser (>€1bn capex), ~45,000 t H2/yr and ~250,000 t CO2 avoided; received €304m public funding and reached FID.
Nearly doubled nine‑month order intake; wins Moeve 300‑MW contract with service package; discontinues SOEC mass‑production, incurring ~€30m one‑time EBIT hit and updating FY26 outlook.
Net income €458m, capex €605m and operating cash flow €762m; leverage fell to 1.2x; groundbreaking for 300 MW Andalusian Green Hydrogen Valley on Sept 17; Galp merger talks continue.
Acquires majority stake leaving Enagás with 20%; portfolio exceeds 850MW electrolysis, 20+ projects and eight FIDs, including Cartagena (2025) and Onuba (first 300MW FID Mar 2026).
The Andalusian Green Hydrogen Valley's first phase, Onuba, will invest €1 billion for 300 MW capacity, with potential for 100 MW more, aiming to decarbonize hard-to-abate sectors in Spain.
The new 50 MWp plant in Huelva will generate 100 GWh annually, powering 28,000 homes, reducing CO2 by 94,400 tons, and creating 10 permanent jobs. Construction involved a 2.78M euro investment.
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