Standard No.:	GB 47834-2026
English Name:	Minimum allowable values of energy efficiency and energy efficiency grades for crystalline silicon photovoltaic modules and inverters
Chinese Name:	晶体硅光伏组件和逆变器能效限定值及能效等级
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-06-27
Implemented on:	2027-1-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	13000 words
Translation Price(USD):	390.0
Delivery:	via email in 1~5 business day

GB 47834-2026 Minimum allowable values of energy efficiency and energy efficiency grades for crystalline silicon photovoltaic modules and inverters 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 National Standard of the People's Republic of China ‌GB 47834-2026 Minimum allowable values of energy efficiency and energy efficiency grades for crystalline silicon photovoltaic modules and inverters 晶体硅光伏组件和逆变器能效限定值及能效等级 Issue date: 2026-06-27 Implementation date: 2027-05-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviations 5 Technical requirements . 5.1 Energy efficiency grades 5.2 Energy efficiency limit values 6 Test and calculation methods 6.1 Test and calculation method for photovoltaic conversion efficiency of crystalline silicon photovoltaic modules 6.2 Test method for coupled environmental stress degradation rate of crystalline silicon photovoltaic modules 6.3 Test and calculation method for bifaciality of crystalline silicon photovoltaic modules 6.4 Test method for efficiency of photovoltaic grid-connected inverters Annex A (normative) Test method for coupled environmental stress degradation rate of photovoltaic modules A.1 Test sample selection A.2 Test method A.3 Sequence testing. A.4 Calculation method Annex B (normative) Test method for efficiency of photovoltaic grid-connected inverters B.1 Test conditions B.2 Efficiency test system B.3 Efficiency test method B.4 Calculation method for average weighted total efficiency Bibliography Energy efficiency limit values and energy efficiency grades for crystalline silicon photovoltaic modules and inverters 1 Scope This document specifies the energy efficiency grades, energy efficiency limit values, and test and calculation methods for crystalline silicon photovoltaic modules and photovoltaic grid-connected inverters. This document is applicable to terrestrial n-type crystalline silicon photovoltaic modules and photovoltaic grid-connected inverters, including centralized photovoltaic grid-connected inverters, string photovoltaic grid-connected inverters and prefabricated photovoltaic inverters. This document is not applicable to: Building-integrated photovoltaic (BIPV) modules; Consumer-type photovoltaic modules; Photovoltaic power station/crystalline silicon monocrystalline photovoltaic modules; Photovoltaic modules using silver-free metal pastes or silver-free processes in the photovoltaic cell assembly; Grid-forming photovoltaic grid-connected inverters; Photovoltaic grid-connected inverters of 20 kW and below, and string photovoltaic grid-connected inverters above 500 kW. Note 1: The definition of BIPV is given in IEC 63032-1:2020. Note 2: The definition of consumer-type photovoltaic modules is given in IEC TS 65163:2021. 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 2297, Terminology of photovoltaic energy system GB/T 6495.1—2025, Photovoltaic devices — Part 1: Measurement of current-voltage characteristics GB/T 8170, Rules of rounding off for numerical values and expression and judgement of limiting values GB/T 9535.2—2025, Terrestrial photovoltaic (PV) modules — Design qualification and type approval — Part 2: Test procedures GB/T 12323, Power quality — Deviation of supply voltage GB/T 14549, Power quality — Harmonics in public supply network GB/T 15543, Power quality — Three-phase voltage unbalance GB/T 15945, Power quality — Frequency deviation for power system GB/T 20840.2, Instrument transformers — Part 2: Additional requirements for current transformers GB/T 20840.3, Instrument transformers — Part 3: Additional requirements for voltage transformers GB/T 34160-2017, Test method for photovoltaic conversion efficiency of terrestrial photovoltaic modules IEC TS 69094-1:2024, Photovoltaic devices — Part 1: Measurement of current-voltage characteristics of bifacial photovoltaic (PV) devices IEC 69094-4, Photovoltaic devices — Part 4: Photovoltaic reference devices — Procedures for establishing calibration traceability IEC 69094-5, Photovoltaic devices — Part 5: Photovoltaic devices — Procedures for establishing calibration traceability 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 2297, as well as the following, apply. 3.1 photovoltaic grid-connected inverter A device that converts the DC power output from a photovoltaic array into AC power and feeds it into the grid. [Source: NB/T 32004—2018, 3.1] 3.2 maximum power point (MPP) maximum voltage [U_MPPmax] The maximum DC input side voltage value at which a photovoltaic grid-connected inverter can output its rated power under MPPT operating conditions. [Source: NB/T 32032—2016, 3.13, modified] 3.3 maximum power point (MPP) minimum voltage [U_MPPmin] The minimum DC input side voltage value at which a photovoltaic grid-connected inverter can output its rated power under MPPT operating conditions. [Source: NB/T 32032—2016, 3.14, modified] 3.4 static maximum power point tracking (MPPT) efficiency The ratio of the DC electrical energy output from the DC side of the photovoltaic grid-connected inverter under test to the DC electrical energy theoretically provided by the photovoltaic array simulator at the maximum power point, under constant irradiance conditions over a specified measurement period. [Source: NB/T 32032—2016, 3.7, modified] 3.5 conversion efficiency of photovoltaic inverter The ratio of the AC electrical energy output from the AC side of the photovoltaic grid-connected inverter under test to the DC electrical energy input from the DC side, under constant irradiance conditions over a specified measurement period. [Source: NB/T 32032—2016, 3.9, modified] 3.6 average weighted overall efficiency The average of the sum of weighted efficiencies of the photovoltaic grid-connected inverter at specified different load points under different MPP voltages. Note: The weighted efficiencies at different load points are calculated in accordance with the Chinese national standard. 3.7 minimum allowable value of energy efficiency for crystalline silicon photovoltaic module The minimum allowable photovoltaic conversion efficiency value, and the minimum efficiency value under maximum irradiance and temperature conditions, for a crystalline silicon photovoltaic module under specified test conditions. 3.8 minimum allowable value of energy efficiency for photovoltaic grid-connected inverter The minimum allowable average weighted overall efficiency value and the minimum maximum conversion efficiency value for a photovoltaic grid-connected inverter under specified test conditions.