--- title: "Annex VI energy audit criteria under the EU Energy Efficiency Directive" canonical_url: "https://www.sorena.io/artifacts/eu/energy-efficiency-directive/annex-vi-audits" source_url: "https://www.sorena.io/artifacts/eu/energy-efficiency-directive/annex-vi-audits" author: "Sorena AI" description: "A grounded guide to the Annex VI minimum criteria for EU Energy Efficiency Directive energy audits: data quality, representative scope, LCCA, calculations, recommendations, and evidence." published_at: "2026-05-09" updated_at: "2026-05-09" keywords: - "EU Energy Efficiency Directive" - "Directive (EU) 2023/1791" - "Annex VI" - "energy audit criteria" - "energy management systems" - "life-cycle cost analysis" - "energy audit evidence" - "Energy Efficiency Directive" - "energy audits" --- **[SORENA](https://www.sorena.io/)** - AI-Powered GRC Platform [Home](https://www.sorena.io/) | [Solutions](https://www.sorena.io/solutions) | [Artifacts](https://www.sorena.io/artifacts) | [About Us](https://www.sorena.io/about-us) | [Contact](https://www.sorena.io/contact) | [Portal](https://app.sorena.io) --- # Annex VI energy audit criteria under the EU Energy Efficiency Directive A grounded guide to the Annex VI minimum criteria for EU Energy Efficiency Directive energy audits: data quality, representative scope, LCCA, calculations, recommendations, and evidence. *EED* *Annex VI* *EU* ## Annex VI energy audit criteria under the EU Energy Efficiency Directive Use this page to understand what an Energy Efficiency Directive energy audit must contain under Annex VI. The focus is audit quality: measured and traceable energy data, representative scope, life-cycle cost analysis, validated savings calculations, and usable audit outputs. Annex VI of Directive (EU) 2023/1791 is the quality floor for energy audits, including audits carried out inside energy management systems. It does not read like a long audit manual. It sets the minimum conditions an audit needs to satisfy before the findings can be trusted: current measured data, a detailed energy-consumption profile, identified efficiency and renewable-energy opportunities, life-cycle cost analysis where possible, representative coverage, validated savings calculations, and storable data for later performance tracking. ## Where Annex VI fits in Article 11 Article 11 of the recast Energy Efficiency Directive links energy audits and energy management systems to enterprise energy consumption. Enterprises above the higher consumption threshold must implement a certified energy management system, while enterprises above the lower threshold that do not implement such a system must undergo an energy audit. For those audits, Article 11 points back to Annex VI. Member States must establish transparent and non-discriminatory minimum audit criteria in accordance with Annex VI, and they must designate a competent authority or body to check that audit timelines are met and that Annex VI criteria are correctly applied. - Enterprises with average annual energy consumption higher than 85 TJ over the previous three years must implement a certified energy management system. - Enterprises with average annual energy consumption higher than 10 TJ over the previous three years, taking all energy carriers together, must undergo an energy audit if they do not implement an energy management system. - The first audit for newly covered enterprises is due by 11 October 2026, with later audits at least every four years. - An environmental management system can exempt an enterprise from Article 11 paragraphs 1 and 2 only if it includes an energy audit based on Annex VI minimum criteria. Sources for this answer: - [Directive (EU) 2023/1791 on energy efficiency](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Article 11 sets the consumption-based triggers for energy management systems and audits, the four-year audit cycle, management action plans, and the link to Annex VI minimum criteria. - [European Commission study on minimum criteria for energy audits and energy management systems](https://energy.ec.europa.eu/publications/study-guidance-member-states-minimum-criteria-energy-audits-and-energy-management-systems_en?ref=sorena.io) - The Commission publication describes the study as practical guidance for authorities implementing Article 8 and Annex VI requirements under the earlier Energy Efficiency Directive framework. ## Minimum audit criteria in Annex VI Annex VI requires an audit to begin from evidence, not assumptions. The audit data must be up-to-date, measured, traceable operational data on energy consumption; for electricity, the audit must also use load profiles. The audit must then review the energy-consumption profile of the relevant buildings or groups of buildings, industrial operations or installations, including transportation. The purpose is not only to describe consumption but to identify energy efficiency measures, renewable-energy opportunities, and the largest improvement opportunities. - Data basis: up-to-date, measured, traceable operational energy-consumption data and electricity load profiles. - Coverage: buildings, building groups, industrial operations, installations, and transportation where relevant to the audited energy profile. - Efficiency output: identified energy efficiency measures to decrease energy consumption. - Renewable output: identified potential for cost-effective use or production of renewable energy. - Savings output: detailed and validated calculations for proposed measures so potential savings are clear. Sources for this answer: - [Directive (EU) 2023/1791 Annex VI](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Annex VI lists the minimum criteria for energy audits, including measured traceable data, detailed consumption profiles, efficiency measures, renewable-energy potential, LCCA, representativeness, calculations, and storable data. ## Data quality and representative measurements A weak Annex VI audit usually fails before the recommendation stage because the data boundary is not traceable. The audit file should show where each consumption value came from, what period it covers, which meters, invoices, operational systems, or load-profile exports support it, and why the selected sites, operations, installations, or transport activity are representative. Representativeness matters because Annex VI requires enough coverage to draw a reliable picture of overall energy performance and to identify the most significant improvement opportunities. Sampling can be practical, but the sample needs a reason: energy intensity, operating hours, process type, building use, climate or occupancy pattern, production line, fleet type, or another factor tied to the energy profile. - Keep a data register with source system, meter or account reference, unit, period covered, extraction date, and validation status. - Separate measured operational data from estimates, normalisations, and assumptions so a reviewer can reproduce the baseline. - Record the representativeness logic for each included or excluded building, process, installation, or transport segment. - For electricity, retain load-profile evidence rather than only annual totals when the audit uses demand patterns to identify savings. - Store the audit dataset in a form that can support historical analysis and later performance tracking. Sources for this answer: - [Directive (EU) 2023/1791 Annex VI](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Annex VI requires up-to-date, measured, traceable operational data, representative audit coverage, and storable audit data for historical analysis and performance tracking. - [BS EN 16247-1:2022 Energy audits - General requirements](https://www.en-standard.eu/bs-en-16247-1-2022-energy-audits-general-requirements/?ref=sorena.io) - This grounding page identifies EN 16247-1:2022 as the general requirements standard for energy audits, aligning with Article 11's instruction to take relevant European or international standards into consideration. ## Life-cycle cost analysis and validated savings Annex VI says audits should build, whenever possible, on life-cycle cost analysis instead of simple payback periods. That changes the finance evidence: the audit should not stop at upfront cost divided by annual savings when long-term savings, residual value, or discount rates materially affect the choice. The audit report should make the calculation trail visible. For each proposed measure, keep the baseline, proposed technical change, expected energy reduction, tariff or cost assumption, investment cost, operating-cost effect, lifetime or assessment period, residual-value assumption where relevant, discount-rate assumption where used, and sensitivity notes for uncertain inputs. - Use simple payback only where life-cycle cost analysis is not possible or is not proportionate, and record why. - State whether the recommendation is an energy efficiency measure, a renewable-energy use or production opportunity, or both. - Show detailed and validated savings calculations for proposed measures, not only qualitative recommendation text. - Tie technical feasibility and economic feasibility to the same assumptions used in the action plan submitted to management. - Keep formulas, input files, reviewer sign-off, and version history with the audit evidence. Sources for this answer: - [Directive (EU) 2023/1791 Annex VI](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Annex VI requires life-cycle cost analysis where possible and detailed, validated calculations for proposed measures to give clear information on potential savings. ## Audit report outputs and recommendation evidence Article 11 requires enterprises covered by the audit obligation to draw up a concrete and feasible action plan based on the audit recommendations. The action plan must identify measures to implement each audit recommendation where technically or economically feasible, and it must be submitted to management. That means the Annex VI audit report should be written so recommendations can move directly into an action plan. Each recommendation should have an owner, affected asset or process, evidence-backed baseline, proposed measure, calculated savings, feasibility conclusion, implementation status, and reason for any recommendation not implemented. - Audit report: scope, audit team independence or qualification basis, data inventory, consumption profile, representative boundary, calculations, recommendations, and evidence index. - Recommendation record: measure description, energy carrier affected, baseline value, expected savings, LCCA or other economic basis, technical feasibility, economic feasibility, and implementation dependency. - Management action plan: measure-by-measure implementation decision, responsible function, target timing where set internally, and explanation where implementation is not technically or economically feasible. - Public reporting support: implementation rate and action-plan information prepared with trade-secret and confidentiality limits in mind. - Historical evidence pack: source data, calculation workpapers, validation checks, final report, management submission, and later performance tracking data. Sources for this answer: - [Directive (EU) 2023/1791 Article 11](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Article 11 requires a concrete and feasible action plan based on audit recommendations, submission to management, and publication of action plans and recommendation implementation rate subject to confidentiality protections. - [Directive (EU) 2023/1791 Annex VI](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Annex VI supports the evidence-pack fields by requiring validated calculations and storable data for historical analysis and performance tracking. *Recommended next step* *Placement: after audit evidence section* ## Turn Annex VI audit criteria into a usable evidence pack Use Sorena to connect Article 11 scope, Annex VI audit criteria, audit data, calculations, management action plans, and implementation evidence. - [Open Research Copilot](/solutions/research-copilot.md): Ask Energy Efficiency Directive questions against cited source material. - [Discuss Annex VI audit evidence](/contact.md): Review audit scope, data quality, calculations, and action-plan evidence with Sorena. ## Primary sources - [Directive (EU) 2023/1791 on energy efficiency](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Primary legal source for Article 11 energy management systems and energy audits, including consumption triggers, audit timing, action-plan requirements, and Annex VI minimum criteria. - Quote: "Energy management systems and energy audits" - [Directive (EU) 2023/1791 Annex VI](https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32023L1791&ref=sorena.io) - Primary legal source for the Annex VI audit-quality criteria: measured traceable data, detailed consumption profiles, efficiency and renewable opportunities, LCCA, representativeness, validated calculations, and storable data. - Quote: "MINIMUM CRITERIA FOR ENERGY AUDITS" - [European Commission study on minimum criteria for energy audits and energy management systems](https://energy.ec.europa.eu/publications/study-guidance-member-states-minimum-criteria-energy-audits-and-energy-management-systems_en?ref=sorena.io) - Commission publication describing guidance for Member State authorities implementing Article 8 and Annex VI requirements under the Energy Efficiency Directive framework. - Quote: "Article 8 and Annex VI requirements" - [BS EN 16247-1:2022 Energy audits - General requirements](https://www.en-standard.eu/bs-en-16247-1-2022-energy-audits-general-requirements/?ref=sorena.io) - Grounding source identifying EN 16247-1:2022 as the general requirements standard for energy audits, relevant to Article 11's reference to European or international standards. - Quote: "Energy audits General requirements" ## Related Topic Guides - [Does ISO 50001 satisfy Article 11 of the EU Energy Efficiency Directive?](/artifacts/eu/energy-efficiency-directive/faq/iso-50001-equivalence.md): FAQ on when ISO 50001 can support the Energy Efficiency Directive Article 11 energy-management-system route, when an energy audit is still needed, and what evidence to keep. - [EED Article 11 action plans and national planning context](/artifacts/eu/energy-efficiency-directive/action-plans.md): How EU Energy Efficiency Directive action plans work: Article 11 audit-based enterprise plans, management approval, publication evidence, and the difference from national NEEAP and NECP planning. - 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