Batteries for 170 megawatts in solar plants in Carmona and Dos Hermanas

The Territorial Delegation of Economy, Finance, European Funds and University, Industry, Energy and Innovation in Seville has granted prior administrative and construction authorization to hybridize with battery energy storage systems (BESS) three photovoltaic plants in Carmona and one in Dos Hermanas, totaling up to 170 MW of installed capacity. This was done through four resolutions signed on October 14 and 22, 2026, and published in the Official Gazette of the Province of Seville number 217, of November 10, 2026, in its Autonomous Administration section. The plants, already in service or under testing, total 496.49 MWh of storage capacity.

The issuing body is the Seville Territorial Delegation of the Ministry of University, Industry, Energy and Innovation of the Regional Government of Andalusia, acting by delegation of the General Secretariat of Energy in accordance with the Resolution of March 11, 2022 (BOJA no. 52, of March 17, 2022). The files are processed according to Title VII of Royal Decree 1955/2000, Law 24/2013 of the Electricity Sector, and Royal Decree 997/2025, of November 5, on urgent measures for the reinforcement of the electrical system, whose provision on common transformers allows the photovoltaic power and the battery power to be computed as a single installed power figure.

In the four procedures, the affected city councils and the Territorial Delegation of Sustainability and Environment in Seville were consulted for a period of fifteen days and raised no objections, as recorded in the files.

Four resolutions and 170 megawatts

• CARMONA 1 HYBRIDIZATION (ARCADIA RENOVABLES 1, S.L., B90486390): file 279.475, 50 MW, CVE BOP-SE-2026-217028, p. 168.
• CARMONA 2 HYBRIDIZATION (ARCADIA RENOVABLES 2, S.L., B90486416): file 279.503, 50 MW, CVE BOP-SE-2026-217029, p. 174.
• CARMONA 3 HYBRIDIZATION (ARCADIA RENOVABLES 3, S.L., B90486408): file 279.474, 50 MW, CVE BOP-SE-2026-217030, p. 180.
• ROTASOL ENERGY III HYBRIDIZATION (ROTASOL ENERGY III, S.L., B90279670): file 286.415, 20 MW, CVE BOP-SE-2026-217031, p. 186.

The three Arcadia Renovables companies share an address at calle General Castaños 13 in Madrid. The installed capacity of each Carmona plant is divided into 42 MW photovoltaic and 36.42 MW of batteries.

What is installed: containers, inverters and transformation centers

Each of the three Carmona hybridizations incorporates a power station with 28 modular battery containers of 5.015 MWh, one container of 2.507 MWh, 171 inverters of 213 kW, three transformation centers of 9,000 kVA, two of 6,600 kVA, and line cells at 30 kV in the SET El Canto. The unit storage capacity is 142.93 MWh.

The Dos Hermanas plant is smaller: 13 containers of 5,015 MWh, one of 2,507 MWh, 81 inverters of 216 kW, and two transformation centers of 9,000 kVA, with 17.25 MW of batteries and 67.70 MWh. The projects are signed by industrial engineer José Antonio Vicente Soltero, member number 6026 of the COIIAOc, with responsible declarations dated July 29 and 21, 2026.

Evacuation nodes and background

• Carmona: connection at the Carmona 400 kV substation, of Red Eléctrica de España, S.A.U., with 36.66 MW of maximum evacuation and 36.7 MW of consumption; updated report dated August 7, 2026.
• Dos Hermanas: connection at Entrenúcleos 220 kV, with 17.3 MW of evacuation and no consumption capacity; report dated July 17, 2026.
• The original photovoltaic plants were authorized between 2022 and 2023 (Carmona 1, 45 MW in July 2022; Rotasol, 20.125 MW in January 2023) and already have operating authorization, definitive in Carmona and provisional for testing in Dos Hermanas.
• The projects are located within the evaluated polygons AAU/SE/24/2020/N and AAU/SE/0045/2021/N, and the Carmona evacuation infrastructure is processed separately, in files 287.261 and 287.262.

Against the resolutions, which do not exhaust the administrative route, an appeal for reversal may be filed before the Counselor of Industry, Energy, and Mines within one month.

The package consolidates in Carmona one of the largest storage blocks associated with photovoltaics in the region: 170 MW hybrid and nearly 500 MWh that will allow solar production to be shifted toward peak demand hours, with the consequent effect on land use and transmission networks in the surroundings of the Sevillian countryside.

Source: Official Gazette of the Province of Seville, no. 217, November 10, 2026, Autonomous Administration, pp. 168-191 (official references: BOP-SE-2026-217028, BOP-SE-2026-217029, BOP-SE-2026-217030, and BOP-SE-2026-217031).