The Ministry for Ecological Transition and the Demographic Challenge (MITECO) has issued a tender for a comprehensive project to enhance energy efficiency at its headquarters in Plaza de San Juan de la Cruz 10, Madrid. The contract is divided into three lots, totalling an estimated value of €26,942,896. Bids are due by September 3, and the execution period for the works is 18 months.

Contract Overview:

• Lot 1: Installation of geothermal energy systems and associated civil works, with an estimated budget of €5,949,526.90.

• Lot 2: Installation of photovoltaic systems and related works, with an estimated budget of €1,384,853.

• Lot 3: Interior renovations, including lighting, envelope treatment, and exterior carpentry, with an estimated budget of €19,608,515.

Photovoltaic System Details:

The photovoltaic component is part of the broader initiative to improve the energy efficiency of MITECO's headquarters. It includes a 100 kW photovoltaic system installed on the roof of modules C, A, and D. This system features:

• Total Panels: 572 photovoltaic panels installed on a metal structure with a 10° inclination and a 5° azimuth angle.

• Panel Configuration: The panels are organized into 24 series across seven large photovoltaic generation blocks:

• Module C: 3 blocks with 11 strings of panels.

• Module A: 3 blocks with 11 strings of panels.

• Module D: 1 block with 3 strings of panels.

Installation Details:

• Inverters: Four three-phase inverters with a nominal AC power of 25 kW each, equipped with three maximum power trackers. The panels are grouped in pairs and connected to the 12 inverter inputs.

• Grid Connection: The system features an anti-dumping system for grid-connected self-consumption without surplus.

Infrastructure:

• Pipelines: Most pipelines will be routed through the interior of the building, leading to the technical room on the 2nd floor, where protection boxes and electrical panels will be installed.

• Structural Considerations: The photovoltaic installation will be below the flat roof's 100 KN/m² load capacity. The mounting system will use a Sunfer brand coplanar structure with ballast-type anchoring.

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The Recovery, Transformation, and Resilience Plan – Next GenerationEU, and the Ministry for Ecological Transition and Demographic Challenge fund the project.