VALENCIA - On July 13, 2026, the Port of Valencia received Spain's first offshore floating solar platform, a pioneering project developed by Spanish startup BlueNewables with the support of energy giant Naturgy. Named Paiporta in honor of the Valencian municipality severely affected by the 2024 DANA storm, the platform represents a significant step forward in the commercialization of marine solar energy.
The 500 kW catamaran-style unit is the first of two PhotoVoltaic-Bluenewables Offshore Solutions (PV-bos) floating platforms planned under a project launched in March 2025. Together, the two units will form a 1 MW installation, with the second structure expected to arrive at the Port of Valencia by late summer to complete the deployment. The platform was built at the San Enrique shipyard in Vigo, Galicia-a facility owned by the Marina Meridional Group-and was towed across the Atlantic to its testing site outside the port's southern breakwater.
Technical Innovation for Harsh Marine Environments
Taking photovoltaic technology to the open sea presents challenges fundamentally different from those of land-based solar plants. Continuous wave action, extreme salinity, ocean winds, and corrosion demand specialized solutions capable of withstanding a far more aggressive environment.
BlueNewables' patented PV-bos technology addresses these challenges through an innovative catamaran-style design optimized for ocean environments. This system enables the use of more efficient floats and positions solar panels at a greater height above sea level, improving both performance and maintenance accessibility. The deck measures 64 meters by 41 meters and accommodates 600 solar modules.
The platform has a unique feature that is its use of bifacial solar panels which are able to produce energy from both the sun and light reflected from the water surface that is sometimes referred to as albedo. With this capability of producing energy in two different ways, the efficiency of the system is greater than that of traditional solar panels with one side. On top of that, the system employs seawater as a coolant to increase energy efficiency.
The platform includes a technical area containing inverters and transformers to monitor prototype performance and enable electricity injection into the Port of Valencia's grid. According to BlueNewables, the patented design enables rapid manufacturing, simplified maintenance, and optimized electricity generation. Each unit is expected to generate approximately 1,500 MWh of electricity annually.
A Strategic Pillar of Port Decarbonization
The Port Authority of Valencia (APV) directly manages this initiative within the framework of the European RENMARINAS VALENCIAPORT program, which receives support through the European Union's NextGeneration EU program. Moreover, the initiative has received financial support from the Spanish Institute for Energy Diversification and Saving (IDAE).
The establishment is included in the more extensive 2035 Strategic Plan of Valenciaport, which has set the following priorities for the strategies to be implemented: decarbonization, energy transition, and climate resilience. The Port Authority has taken the commitment to becoming carbon neutral in Valencia, Sagunto, and Gandia by 2035, and the total investments needed for this might reach approximately €900 million.
As part of the project, the APV will establish a testing platform for connecting, testing, and feeding marine renewable energy demonstration systems into the power grids of the ports of Valencia and Sagunto-infrastructure that will remain available for future use. The initiative also involves collaboration with EnerMarPort, which will install wave energy systems at the Port of Sagunto.
A Pre-Commercial Milestone with Global Ambitions
While referred to as Spain's first offshore solar platform, it is important to note that this is the first at a pre-commercial scale. A smaller prototype was tested at the same port in 2023 to conduct initial viability experiments. The arrival of Paiporta represents the leap from that basic testbed to a mature infrastructure nearly ready for commercialization.
Naturgy and BlueNewables will collaborate for two years to exchange technical, operational, strategic, and financial information related to the project's development, both during the testing phase and in subsequent monitoring. This collaboration will include analysis of performance data, technical incidents, costs, operations, and lessons learned to assess the technology's potential.
BlueNewables plans to expand the technology globally in the coming years through collaboration with steel structure manufacturers, ports, industrial partners, and shipyards such as San Enrique. The company said the initiative could provide a diversification opportunity for the Galician shipbuilding industry. Asturian PV manufacturer Alusin Solar also contributed to the design and development of the structures.
Implications for the Offshore Solar Sector
The Valencia project arrives at a moment of growing interest in offshore floating solar worldwide. Recent research has found that offshore floating photovoltaic systems can generate approximately 12% more electricity over their lifetime than conventional ground-mounted installations under the same conditions, due largely to the natural cooling effect of seawater.
Spain itself holds significant offshore solar potential. Studies estimate the country could host between 4.45 GW and 6.48 GW of floating offshore solar capacity, covering up to 9% of national electricity demand. The Spanish government has recently established a clear regulatory framework for ocean energy through a Royal Decree published in 2024, with a €200 million grant program to support marine renewables, including floating solar devices.
Globally, offshore floating solar is transitioning from concept validation to engineering demonstration. Projects such as SolarDuck's Merganser pilot in the Dutch North Sea and France's Sun Sète project in the Mediterranean are testing structural, mooring, and electrical designs necessary for large-scale commercial deployment. The Valencia platform adds a distinctive contribution to this emerging field through its catamaran-style design, bifacial panel integration, and modular, industrialized manufacturing approach.
Challenges and the Path Forward
Despite its promise, offshore floating solar faces persistent challenges. Conventional steel platforms remain susceptible to corrosion and structural degradation in harsh marine environments. High humidity, occasional saltwater contact, marine wildlife interactions, and the buoyant, vibrating motions of floating platforms all present unknowns for long-term performance. The two-year testing phase at Valencia is designed precisely to address these uncertainties, generating the operational data needed to validate the technology's reliability and economic viability.
Offshore floating solar also offers compelling synergies with other marine renewable technologies. The floating photovoltaic platform represents a significant pathway for hybridization with offshore wind, as well as applications in decarbonizing port operations and near-coast industrial activities.
Paiporta is not just a technological exhibit for the port of Valencia; it is a declaration on the part of this busy Mediterranean port of its commitment to be at the forefront of the energy transition process, utilizing its waters as a laboratory for renewable technological solutions in the field of maritime and energy infrastructure in the near future. The fact that the midnight sun exists far to the north does not stop the phenomena of solar energy generation at sea from being observed along the shores of Valencia, where the first experiments on innovative solutions for solar energy production at sea have begun.
