Standard No.:	NB/T 11905-2025
English Name:	Quantification method and standard for life cycle assessment of carbon emission from photovoltaic power project
Chinese Name:	光伏发电项目全生命周期碳排放量化方法及评价标准
Professional Classification:	NB    Professional Standard - Energy
Source Content Issued by:	National Energy Administration
Issued on:	2025-12-18
Implemented on:	2026-6-18
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	14500 words
Translation Price(USD):	435.0
Delivery:	via email in 1~5 business day

NB/T 11905-2025 Quantification method and standard for life cycle assessment of carbon emission from photovoltaic power project English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS H Professional Standard of the People’s Republic of China NB/T 11905-2025 Quantification method and standard for life cycle assessment of carbon emission from photovoltaic power project 光伏发电项目全生命周期碳排放量化方法及评价标准 (English translation) Issue date: 2023-12-28 Implementation date: 2024-06-28 Issued by the National Energy Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 General principles 5 Functional unit 6 System boundary and quantification scope 7 Quantification methods 8 Data collection 9 Evaluation indicators 10 Report elements Annex A (informative) Altitude adjustment factor table Annex B (informative) Data inventory example Annex C (informative) Quantification and evaluation example Annex D (informative) Report template Photovoltaic power projects — Life-cycle carbon emission quantification methods and evaluation standards 1 Scope This document specifies the system boundary and quantification scope, quantification methods, data collection and evaluation indicators for the quantification of life-cycle carbon dioxide emissions of photovoltaic power projects. This document is applicable to the quantification and evaluation of life-cycle carbon emissions of centralized photovoltaic power projects. Distributed photovoltaic power projects may refer to this document. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 24020, Environmental management — Environmental labels and declarations — General principles GB/T 24025, Environmental labels and declarations — Type III environmental declarations — Principles and procedures GB/T 24040, Environmental management — Life cycle assessment — Principles and framework GB/T 24044, Environmental management — Life cycle assessment — Requirements and guidelines GB/T 32150, General rules for accounting and reporting of greenhouse gas emissions by industrial enterprises GB/T 50796, Code for acceptance of photovoltaic power projects GB/T 51366, Standard for building carbon emission calculation NB/T 32035, Quota for estimation of photovoltaic power engineering ISO/TS 14027, Environmental labels and declarations — Development of product category rules ISO 14064-1, Greenhouse gases — Part 1: Specification with guidance at the organization level for quantification and reporting of greenhouse gas emissions and removals ISO 14067, Greenhouse gases — Carbon footprint of products — Requirements and guidelines for quantification ISO 21930, Sustainability in buildings and civil engineering works — Core rules for the preparation of environmental product declarations (EPDs) for construction products and services 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 24020, GB/T 24025, GB/T 24040, GB/T 24044, GB/T 50796, ISO/TS 14027, ISO 14064-1, ISO 14067 and ISO 21930, as well as the following, apply. 3.1 photovoltaic power project An engineering entity that uses photovoltaic modules to convert solar energy into electricity and is electrically connected to the public grid, consisting of photovoltaic modules, inverters, lines and other electrical equipment, monitoring systems and buildings (structures). [Source: GB/T 50796-2012, 2.0.1, modified] 3.2 life cycle Consecutive and interlinked stages of a system, from the acquisition of raw materials from nature or natural resources to final disposal. [Source: GB/T 24040-2008, 3.1, modified] 3.3 carbon emission The total mass of carbon dioxide released directly or indirectly into the atmosphere over a specific time period. [Source: ISO 14064-1:2018, 3.1.5, modified] 3.4 system boundary A set of criteria specifying which unit processes are part of a project system. [Source: GB/T 24040-2008, 3.32, modified] 3.5 functional unit A quantified performance of a project system used as a reference unit. [Source: GB/T 24040-2008, 3.20, modified] 3.6 activity data A characterizing value of the amount of production or consumption activity that leads to carbon emissions. [Source: GB/T 32150-2015, 3.12, modified] 3.7 emission factor A coefficient characterizing the carbon emissions per unit of production or consumption activity. [Source: GB/T 32150-2015, 3.13, modified] 3.8 cut-off criteria Specifications regarding the material and energy flows or the importance of carbon emission impacts related to a project system that are excluded from the scope of the study. [Source: GB/T 24040-2008, 3.18, modified] 3.9 allocation Partitioning of input and output flows from a project system among the project system under study and one or more other project systems. [Source: GB/T 24040-2008, 3.17, modified] 3.10 product category rules (PCR) A set of specific rules, requirements and guidelines that must be met for Type III environmental declarations for one or more product categories. [Source: GB/T 24025-2009, 3.5] 4 General principles 4.1 Purpose of evaluation To quantify the carbon emissions of photovoltaic power projects from a life-cycle perspective, identify key carbon emission sources or stages, achieve refined carbon emission management throughout the project life cycle, provide scientific decision-making support for project greenhouse gas emission environmental impact assessment, low-carbon supply chain management, and implementation of low-carbon technologies during the project operation phase, and promote collaborative carbon reduction across the industry chain. 4.2 Basic principles This document follows the basic requirements of GB/T 24040 and GB/T 24044 for life-cycle assessment methodology and follows the provisions of ISO 14067:2018 for carbon footprint assessment. At the same time, if relevant product category rules for product carbon footprint exist, the requirements of ISO/TS 14027:2017 regarding product category rules shall be followed. 4.3 Basic process The basic process includes: determination of system boundary and quantification scope, data inventory collection, and carbon emission quantification and evaluation.