Certifications, Studies and Technical Reports
Service overview
Ultravioleta Solar provides a comprehensive service covering certifications and technical documentation, essential both for the legalisation of new installations and the regularisation of existing ones, as well as for property-related administrative procedures.
Types of certifications
CIE – Electrical Installation Certificate
Official document certifying that the installation complies with the Low Voltage Electrotechnical Regulation (REBT). Issued by an authorised installer.
CDFO – Certificate of Completion of Works
Confirms that the installation has been executed correctly and in accordance with the approved technical design.
EPC – Energy Performance Certificate
Energy rating of the building (A–G scale). Mandatory for the sale and rental of properties.
Energy efficiency audit
Detailed consumption analysis with quantified optimisation proposals and estimated savings.
Regulatory compliance certificate
Global verification that an installation complies with all applicable regulations.
Energy rating scale
- Class A represents the highest level of energy efficiency and includes buildings or equipment with very low energy consumption compared to less efficient categories, resulting in significantly lower operating costs and environmental impact.
- Classes B and C correspond to very high and high efficiency levels respectively. Although they do not reach the performance of class A, they remain below the average consumption level and generally offer favourable energy performance.
- Class D occupies an intermediate position in the scale and can be considered a medium to medium-high efficiency level, marking the transition between energy-efficient categories and those with less favourable performance.
- Class E is associated with an average efficiency level and is frequently one of the most common ratings within the Spanish building stock.
- Classes F and G represent low and very low energy efficiency. They are associated with above-average consumption and a significant potential for improvement through measures involving insulation, HVAC systems, lighting, equipment and the integration of renewable energy sources.
Technical note
Around 81% of buildings in Spain fall within the E, F or G ratings. The installation of a self-consumption photovoltaic system, combined with improved insulation and high-efficiency equipment, can typically improve a dwelling’s energy rating by between one and three levels.