The two organizations have sent the Ministry of Ecological Transition a set of proposals to strengthen the deployment of storage in Spain.
Hybrid storage has advantages such as not requiring new infrastructures or less investment.
Madrid, May 20, 2025 – The Fundación Renovables and the Spanish Photovoltaic Union (UNEF) are calling for measures to streamline administrative procedures for the authorization of energy storage systems hybridized with renewable generation plants. The two organizations have submitted a technical document to the Ministry for Ecological Transition containing a series of proposals aimed at strengthening the deployment of hybridized storage in Spain.
This request stems from the need to make the renewable and photovoltaic sector more competitive, as the more than 800 hours of zero or negative prices in 2024 make it difficult to attract investment in a photovoltaic sector whose production does not generate sufficient economic returns to provide financial security to investors.
The incorporation of hybrid storage systems into photovoltaic plants enables the capture of the price spread in the wholesale market curve while also flattening prices. Additionally, it offers other advantages, such as not requiring new electrical infrastructure and a lower investment need by making use of already existing installations.
In this regard, Fundación Renovables and UNEF are calling for measures to promote the development of hybrid storage systems. Among them is the adaptation of Royal Decree 1183/2020 on access and connection to energy transmission and distribution networks, to establish a new category of access and connection permit for generators requesting an update of their access point to include energy storage elements.
Moreover, it is necessary that solar plants currently holding a 24-hour connection point be allowed to use it bidirectionally without additional administrative requirements beyond simply notifying the distributor.
The two organizations are also advocating for the development of "flexible connection" regulations, as it makes no sense that an existing hybrid solar plant does not have the same rights as a stand-alone plant. In this regard, it is essential to allow for the legal ownership of the photovoltaic and storage plants to be different entities.
Given that these batteries would be installed on already occupied land, we are also calling for the exclusion of the requirement for a new Environmental Impact Statement for storage installations, since the associated photovoltaic plants have already received a favorable EIS.
It is also necessary to extend the validity of access and connection points in order to prolong the lifespan of RECORE plants that are hybridized with storage, as well as to implement a specific tax regime for energy generated from renewable sources, including that shifted through hybridization.
You can read the full document here (in Spanish)