Overview
ISO 50047:2016 - Energy savings: Determination of energy savings in organizations - provides a structured, organization-level framework for quantifying and reporting energy savings. It applies to any organization (with or without an ISO 50001 energy management system) and sets out principles for defining purpose and boundaries, preparing energy accounting, selecting an approach to quantify savings, establishing baselines, normalizing consumption, calculating savings, and reporting results. It does not prescribe specific measurement-and-verification (M&V) techniques.
Key topics and requirements
- Two mutually consistent approaches
- Organization-based approach - compares measured energy consumption within defined organizational boundaries between baseline and reporting periods.
- EPIA-based approach - aggregates savings from individual Energy Performance Improvement Actions (EPIAs) implemented within those boundaries.
- Energy accounting
- Use consistent rules, units and conventions to measure and aggregate energy (electricity, fuels, steam, heat, compressed air, etc.).
- Distinguish delivered energy (arriving at boundaries) and primary energy (source), and apply conversions where needed.
- Energy baseline and normalization
- Establish a quantitative baseline period for comparison.
- Apply normalization for relevant variables (e.g., production volume, degree days) to ensure fair comparisons between periods.
- Data preparation and calculation
- Select equivalent time periods; apply non-routine adjustments; address indirect energy effects and avoid double counting when aggregating EPIAs.
- Accuracy and uncertainty
- Improve results via data quality controls and follow guidance on acceptable uncertainty criteria.
- Reporting
- Provide transparent reporting practices, including guidance for groups of companies and reconciliations between the two approaches.
Practical applications and users
ISO 50047 is useful for:
- Energy managers and sustainability officers calculating organizational energy savings for internal performance tracking or external reporting.
- Facility and operations managers establishing baselines and normalizing energy use for production changes or weather.
- Consultants and auditors performing savings quantification, reconciliation and assurance work.
- Corporate reporting teams preparing energy savings disclosures and reconciling project-level EPIA reporting with organization-level totals.
- Policy makers and programme administrators seeking standardized approaches to quantify energy savings across participants.
Use cases include establishing corporate energy baselines, aggregating savings from retrofit projects, reporting savings across multiple sites, and reconciling project-level M&V with organization-level results.
Related standards
- ISO 50015 - Measurement and verification (M&V) principles for energy performance of organizations (complements ISO 50047).
- ISO 17743 - Framework for determination and reporting of energy savings in projects, organizations and regions (broad consistency noted).
