GB/T 29759-2026 Insulating solar photovoltaic（PV）glass unit in building 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/T 29759-2026
Insulating solar photovoltaic（PV）glass unit in building
建筑用太阳能光伏中空玻璃
Issue date: 2026-02-27 Implementation date: 2027-03-01
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 Classification
5 Materials
6 Requirements
7 Test methods
8 Inspection rules
9 Packaging, marking, transportation and storage
Insulating solar PV glass units for building
1 Scope
This document specifies the classification, materials, requirements, test methods, inspection rules, packaging, marking, transportation and storage for insulating solar PV glass units for building.
This document is applicable to insulating solar PV glass units for building. Insulating solar PV glass units for other purposes 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 9535.2, Photovoltaic modules for ground use — Design qualification and type — Part 2: Test procedures
GB/T 11944-2025, Insulating glass unit
GB/T 22476, Calculation and determination of steady-state U-value (thermal transmittance) of insulating glass units
GB/T 29551-2023, Laminated solar PV glass for building
GB/T 38214-2019, Test method of inert gas content for insulating glass units
GB/T 40415-2021, Test method for transmittance of photovoltaic glass modules for building
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
insulating solar PV glass unit
A glass product with power generation function, consisting of two or more glass panes, at least one of which is a laminated solar PV glass, uniformly separated by effective supports and sealed at the edges, forming a dry gas space between the glass layers.
[Source: GB/T 11944-2025, 3.1, modified]
3.2
ratio of the transparent area to the total
The ratio of the transparent area of the insulating solar PV glass unit to the illuminated area.
Note: The illuminated area does not include the area of the outer and inner sealants at the edges of the insulating glass unit.
[Source: GB/T 40415-2021, 3.3, modified]
4 Classification
4.1 By shape
Divided into flat type and curved type insulating solar PV glass units.
4.2 By photovoltaic cell
According to the photovoltaic cell used in the laminated solar PV glass, they are divided into:
a) Crystalline silicon cell type insulating solar PV glass unit: the laminated solar PV glass uses crystalline silicon cells, as shown in Figure 1;
b) Thin-film cell type insulating solar PV glass unit: the laminated solar PV glass uses thin-film cells, as shown in Figure 2.
5 Materials
The following requirements shall be met:
a) Laminated solar PV glass shall comply with GB/T 29551-2023;
b) Edge sealants, spacers, desiccants and glass shall comply with GB/T 11944-2025.
6 Requirements
6.1 General
The requirements, test methods and judgment criteria for flat type insulating solar PV glass units (hereinafter referred to as "flat type products") shall comply with the corresponding provisions in Table 1. The requirements, test methods and judgment criteria for curved type insulating solar PV glass units (hereinafter referred to as "curved type products") and insulating solar PV glass units with special requirements (hereinafter referred to as "products with special requirements") shall be agreed upon between the supplier and the purchaser.
6.2 Appearance quality
Shall comply with the appearance quality requirements of GB/T 11944-2025, and the laminated solar PV glass shall comply with the appearance quality requirements of GB/T 29551-2023.
6.3 Dimensions and tolerances
6.3.1 Length and width tolerances
The permissible deviations of length or width for flat type products shall comply with Table 2. Curved type products shall be agreed upon between the supplier and the purchaser.
6.3.2 Thickness and tolerances
The permissible deviation of thickness for flat type products is ±2.5 mm. Curved type products shall be agreed upon between the supplier and the purchaser.
6.3.3 Diagonal difference
The diagonal difference for rectangular flat type products shall not exceed 0.2 % of the average diagonal length. Products of other shapes shall be agreed upon between the supplier and the purchaser.
6.3.4 Permissible offset
The permissible offset for flat type products shall comply with Table 3. Curved type products and products with special requirements shall be agreed upon between the supplier and the purchaser.
6.3.5 Inner sealant width
Shall comply with 6.1.5 in GB/T 11944-2025.
6.3.6 Outer sealant depth
Shall comply with 6.1.6 in GB/T 11944-2025.
6.3.7 Spacer position deviation
Shall comply with 6.1.7 in GB/T 11944-2025.
6.4 Transmittance
The transmittance of the insulating solar PV glass unit is the product of the base transmittance and the ratio of the transparent area to the total, and shall comply with the requirements agreed upon between the supplier and the purchaser.
6.5 Maximum power
The difference between the maximum power value after initial stabilization and the initial value shall be within ±3 % of the initial value.
6.6 Insulation
The following requirements shall be met:
a) No insulation breakdown or surface tracking;
b) For insulating solar PV glass units with an area not greater than 0.1 m², the insulation resistance shall be not less than 400 MΩ;
c) For insulating solar PV glass units with an area greater than 0.1 m², the insulation resistance multiplied by the product area shall be not less than 400 MΩ·m².
6.7 Wet leakage current
The following requirements shall be met:
a) For insulating solar PV glass units with an area not greater than 0.1 m², the insulation resistance shall be not less than 400 MΩ;
b) For insulating solar PV glass units with an area greater than 0.1 m², the insulation resistance multiplied by the product area shall be not less than 400 MΩ·m².
6.8 Ultraviolet (UV) irradiation resistance
After testing, the internal surface of the specimen shall be free from fogging, water vapour condensation or contamination marks, and the seal shall not show significant deformation. When non-glass materials are used in the insulating cavity, the materials shall show no significant discoloration or deformation after testing.
After testing, the wet leakage current shall comply with 6.7, and the maximum power attenuation shall be less than 3 %.
6.9 Dew point
The dew point temperature shall be below −40 °C.
6.10 Water vapour seal durability
After testing, the average water vapour permeation index Iₐᵥ shall not exceed 0.20, and the maximum water vapour permeation index I shall not exceed 0.25.
After testing, the wet leakage current shall comply with 6.7, and the maximum power attenuation shall be less than 3 %.
6.11 Initial inert gas content
The initial inert gas content of gas-filled insulating solar PV glass units shall be not less than 85 %.
6.12 Gas seal durability
Standard
GB/T 29759-2026 Insulating solar photovoltaic（PV）glass unit in building (English)
Standard No.
GB/T 29759-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
8000 words
Translation Price(USD)
240.0
Implemented on
2026-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 29759-2026
Standard No.
GB/T 29759-2026
English Name
Insulating solar photovoltaic（PV）glass unit in building
GB/T 29759-2026 Insulating solar photovoltaic（PV）glass unit in building 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/T 29759-2026
Insulating solar photovoltaic（PV）glass unit in building
建筑用太阳能光伏中空玻璃
Issue date: 2026-02-27 Implementation date: 2027-03-01
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 Classification
5 Materials
6 Requirements
7 Test methods
8 Inspection rules
9 Packaging, marking, transportation and storage
Insulating solar PV glass units for building
1 Scope
This document specifies the classification, materials, requirements, test methods, inspection rules, packaging, marking, transportation and storage for insulating solar PV glass units for building.
This document is applicable to insulating solar PV glass units for building. Insulating solar PV glass units for other purposes 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 9535.2, Photovoltaic modules for ground use — Design qualification and type — Part 2: Test procedures
GB/T 11944-2025, Insulating glass unit
GB/T 22476, Calculation and determination of steady-state U-value (thermal transmittance) of insulating glass units
GB/T 29551-2023, Laminated solar PV glass for building
GB/T 38214-2019, Test method of inert gas content for insulating glass units
GB/T 40415-2021, Test method for transmittance of photovoltaic glass modules for building
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
insulating solar PV glass unit
A glass product with power generation function, consisting of two or more glass panes, at least one of which is a laminated solar PV glass, uniformly separated by effective supports and sealed at the edges, forming a dry gas space between the glass layers.
[Source: GB/T 11944-2025, 3.1, modified]
3.2
ratio of the transparent area to the total
The ratio of the transparent area of the insulating solar PV glass unit to the illuminated area.
Note: The illuminated area does not include the area of the outer and inner sealants at the edges of the insulating glass unit.
[Source: GB/T 40415-2021, 3.3, modified]
4 Classification
4.1 By shape
Divided into flat type and curved type insulating solar PV glass units.
4.2 By photovoltaic cell
According to the photovoltaic cell used in the laminated solar PV glass, they are divided into:
a) Crystalline silicon cell type insulating solar PV glass unit: the laminated solar PV glass uses crystalline silicon cells, as shown in Figure 1;
b) Thin-film cell type insulating solar PV glass unit: the laminated solar PV glass uses thin-film cells, as shown in Figure 2.
5 Materials
The following requirements shall be met:
a) Laminated solar PV glass shall comply with GB/T 29551-2023;
b) Edge sealants, spacers, desiccants and glass shall comply with GB/T 11944-2025.
6 Requirements
6.1 General
The requirements, test methods and judgment criteria for flat type insulating solar PV glass units (hereinafter referred to as "flat type products") shall comply with the corresponding provisions in Table 1. The requirements, test methods and judgment criteria for curved type insulating solar PV glass units (hereinafter referred to as "curved type products") and insulating solar PV glass units with special requirements (hereinafter referred to as "products with special requirements") shall be agreed upon between the supplier and the purchaser.
6.2 Appearance quality
Shall comply with the appearance quality requirements of GB/T 11944-2025, and the laminated solar PV glass shall comply with the appearance quality requirements of GB/T 29551-2023.
6.3 Dimensions and tolerances
6.3.1 Length and width tolerances
The permissible deviations of length or width for flat type products shall comply with Table 2. Curved type products shall be agreed upon between the supplier and the purchaser.
6.3.2 Thickness and tolerances
The permissible deviation of thickness for flat type products is ±2.5 mm. Curved type products shall be agreed upon between the supplier and the purchaser.
6.3.3 Diagonal difference
The diagonal difference for rectangular flat type products shall not exceed 0.2 % of the average diagonal length. Products of other shapes shall be agreed upon between the supplier and the purchaser.
6.3.4 Permissible offset
The permissible offset for flat type products shall comply with Table 3. Curved type products and products with special requirements shall be agreed upon between the supplier and the purchaser.
6.3.5 Inner sealant width
Shall comply with 6.1.5 in GB/T 11944-2025.
6.3.6 Outer sealant depth
Shall comply with 6.1.6 in GB/T 11944-2025.
6.3.7 Spacer position deviation
Shall comply with 6.1.7 in GB/T 11944-2025.
6.4 Transmittance
The transmittance of the insulating solar PV glass unit is the product of the base transmittance and the ratio of the transparent area to the total, and shall comply with the requirements agreed upon between the supplier and the purchaser.
6.5 Maximum power
The difference between the maximum power value after initial stabilization and the initial value shall be within ±3 % of the initial value.
6.6 Insulation
The following requirements shall be met:
a) No insulation breakdown or surface tracking;
b) For insulating solar PV glass units with an area not greater than 0.1 m², the insulation resistance shall be not less than 400 MΩ;
c) For insulating solar PV glass units with an area greater than 0.1 m², the insulation resistance multiplied by the product area shall be not less than 400 MΩ·m².
6.7 Wet leakage current
The following requirements shall be met:
a) For insulating solar PV glass units with an area not greater than 0.1 m², the insulation resistance shall be not less than 400 MΩ;
b) For insulating solar PV glass units with an area greater than 0.1 m², the insulation resistance multiplied by the product area shall be not less than 400 MΩ·m².
6.8 Ultraviolet (UV) irradiation resistance
After testing, the internal surface of the specimen shall be free from fogging, water vapour condensation or contamination marks, and the seal shall not show significant deformation. When non-glass materials are used in the insulating cavity, the materials shall show no significant discoloration or deformation after testing.
After testing, the wet leakage current shall comply with 6.7, and the maximum power attenuation shall be less than 3 %.
6.9 Dew point
The dew point temperature shall be below −40 °C.
6.10 Water vapour seal durability
After testing, the average water vapour permeation index Iₐᵥ shall not exceed 0.20, and the maximum water vapour permeation index I shall not exceed 0.25.
After testing, the wet leakage current shall comply with 6.7, and the maximum power attenuation shall be less than 3 %.
6.11 Initial inert gas content
The initial inert gas content of gas-filled insulating solar PV glass units shall be not less than 85 %.
6.12 Gas seal durability
