Overview
ISO/TS 50044:2019 - Energy saving projects (EnSPs): Guidelines for economic and financial evaluation provides a methodological framework to compare, prioritize and report energy saving projects (EnSPs) using consistent economic and financial evaluation. The Technical Specification is applicable to all EnSPs and energy performance improvement actions (EPIAs), regardless of organization size or sector. It focuses on planning evaluations, identifying costs and benefits, applying economic indicators, assessing uncertainty, and reporting results. Note: methodologies for quantifying predicted energy savings, measurement & verification (M&V) or scenario generation are explicitly outside the scope.
Key topics and requirements
ISO/TS 50044 defines principles and practical steps for economic and financial assessments of EnSPs, including:
- Planning the evaluation: define EnSP description, lifetime, project boundaries and required accuracy.
- Data collection: identify inputs needed for cash-flow and benefit estimation.
- Energy and non‑energy effects: guidance to estimate energy savings (prediction is out of scope), and to quantify non-energy benefits and convert effects to economic value.
- Costs and cash flows: classify costs (variable, fixed, capital) and prepare future cash-flow profiles.
- Economic & financial indicators: recommended indicators include Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), Life Cycle Cost Analysis (LCCA) and Profitability Index.
- Assessment and analysis: apply sensitivity analysis, uncertainty and risk assessment, and evaluate data quality.
- Decision-making and reporting: provide standardized reporting principles and templates for transparent decision support.
- Annexes: informative annexes (A–F) give step-by-step calculations and worked examples for NPV, IRR, payback and LCCA.
Practical applications and users
ISO/TS 50044 is designed to support:
- Energy managers and sustainability teams prioritizing retrofit or efficiency portfolios.
- Financial analysts and investment committees evaluating returns and life-cycle costs of EnSPs.
- Project developers and ESCOs preparing business cases and comparing alternatives.
- Procurement and facility managers integrating energy performance into decision-making.
- Policy makers, NGOs and auditors who require consistent methods to quantify economic impacts of energy measures.
Use cases include ranking retrofit projects, preparing investment proposals, embedding EnSP appraisal within ISO 50001 energy management processes, and harmonizing evaluation approaches across portfolios.
Related standards
- ISO/TS 50044 complements ISO 50001 (energy management systems) and can be used alongside other M&V standards and protocols. The document itself notes that general rules here can be applied independently or in conjunction with other standards and measurement frameworks.
Keywords: ISO/TS 50044, energy saving projects, EnSPs, economic evaluation, financial evaluation, NPV, IRR, payback, LCCA, energy performance.