3 MW Electric Battery in Bayas: 30 days to submit allegations

The Official Gazette of the Principality of Asturias (BOPA) number 219, dated November 12, 2026, publishes the public information regarding the prior administrative authorization of a standalone electrical storage facility promoted by Proyecto Sunvolt Uno, S. L. in the council of Soto del Barco. The announcement, processed by the Ministry of Science, Industry, and Employment, opens a period of 30 business days for residents, landowners, and other interested parties to submit allegations against the project, identified by code 2026-09144 and file AUTO/2023/17513 (AT-10884).

A 12.22 MWh lithium battery park

The projected installation, commercially named “PB Bayas Aeropuerto”, will have 3 MW of installed power and a storage capacity of 12.22 MWh, equivalent to four hours of discharge at full power. The system consists of:

• Three 20-foot LFP (lithium iron phosphate) lithium-ion battery containers, with a capacity of 4.073 MWh each.
• Five racks with eight battery modules per container, featuring liquid cooling.
• A power station (Skid) with a 3,000 kVA converter and a 3,500 kVA ONAN oil transformer, 0.67/22 kV.
• A 22 kV switching and metering center in two prefabricated concrete buildings, with shielded gas-insulated switchgear (non-fluorinated gas) and a 160 kVA dry-type auxiliary services transformer.
• A 22 kV single-circuit underground high-voltage line, 34 meters in length, which will connect to the “Bayas Aeropuerto E-Redes” switching center, currently being processed in separate file AT-14257 as a new extension of the distribution network.

The execution budget for the facilities amounts to 2,341,737.82 euros. The stated purpose is to store electrical energy to optimize its use, improve supply efficiency, and encourage the penetration of renewables in the generation mix.

Location between Granda, Folgueras, and Soto

The plant will be located on the plot with cadastral reference 33069A024000340000YS (Polygon 24, Plot 34), southeast of the Monte de Granda quarry, within the grid of the Derived Exploitation Concession Section C) named Marian. The land is situated north of the rural center of Folgueras, in the Alto del Praviano, and east of the population center of Soto, in the council of Soto del Barco.

The project is subject to a simplified environmental impact assessment as it is included in Annex II of Law 21/2013, of December 9, on environmental assessment. The environmental impact report corresponds to the General Directorate of the Environment, under the Department of Mobility, Environment and Emergency Management; the resolution on the prior administrative and construction authorization corresponds to the Department of Science, Industry and Employment; and the processing of the file corresponds to the General Directorate of Energy and Mining.

How and where to file objections

The procedure complies with Law 24/2013, of December 26, on the Electricity Sector, and Royal Decree 1955/2000, of December 1, which regulates the authorization procedures for electrical energy installations. The 30-business-day period begins the day following the publication of the announcement.

• Technical documentation can be consulted in digital format on the Electronic Office Notice Board, under the section Topics > Industry and energy > Industry and energy in Asturias > High Voltage Installations of the portal www.asturias.es.
• It may also be examined during office hours at the General Directorate of Energy and Mining (Plaza de España 1, 3rd floor, 33007 Oviedo), by prior appointment via email at altatension@asturias.org.
• Objections shall be submitted in accordance with Article 16 of Law 39/2015 and addressed to the Energy Management Service of the General Directorate of Energy and Mining; representation must be accredited when acting through a representative.

The announcement was signed in Oviedo on November 3, 2026, by the Head of the Energy Management Service.

Impact on affected parties

The publication opens the only formal window for citizen participation before the Administration resolves the authorization of the battery park; therefore, those who consider their interests to be affected must submit their objections within the indicated period. The project adds to the implementation of stationary storage in Asturias, and its authorization also depends on the environmental report from the General Directorate of the Environment.

Source: Official Gazette of the Principality of Asturias, no. 219 of November 12, 2026, section I. Principality of Asturias — Announcements (official reference: 2026-09144).