Photovoltaic glass—Ultra-clear + Single/Double-glass + Coating (Source: JMBIPV): Golden Rule: Low-iron, 91% light transmission (Source: Douyin); Core: Produced via the rolling process (Source: Douyin); Note: Choose single-glass for color steel tile roofs (Source: Douyin).
I. Ultra-clear Glass
Low-iron: Iron content ≤120ppm (Source: JMBIPV);
Light Transmission: 91–92% (Source: JMBIPV); Patterning: Ultra-clear patterned glass (Source: Douyin); Comparison: Float glass is 85% transmissive with a greenish tint (Source: Douyin); Manufacturing: Produced via the rolling process (Source: Douyin)—Ultra-clear: Low-iron + High transmission + Patterning (Three key features).
II. Single-glass vs. Double-glass
Single-glass: 3.2mm glass + backsheet (Source: Douyin);
Double-glass: 2mm + 2mm dual-sided glass (Source: SurgePV); Power Generation: Double-glass enables bifacial generation (Source: Douyin); Weight: Double-glass is approximately 5kg lighter (Source: Douyin); Lifespan: Double-glass offers 30-year durability against sun exposure (Source: Douyin)—Single vs. Double: Single-glass vs. Double-glass vs. Lifespan (Three factors to weigh).
III. Coating Process
AR: Anti-reflective (AR) coating (Source: SurgePV); Double-coated: Double-sided AR coating (Source: XFX); Gain: 3–4% annual power generation gain (Source: SurgePV); Payback: 3–5 year cost recovery (Source: SurgePV); Dust-proof: Dust-resistant AR coating (Source: SurgePV)—Coating: AR + Gain + Dust-proof (three benefits).
IV.
Thickness Specifications
2.0mm: 2.0mm front glass for double-glass modules (Source: Douyin); 2.5mm: 2.5mm ultra-clear double-coated glass (Source: XFX); 3.2mm: Standard 3.2mm single-glass module (Source: JMBIPV); 4mm: Custom 4mm high-transmittance glass (Source: yilinglass); Standard: 25-year warranty starting at 3mm (Source: JMBIPV)—Thickness: 2.0 + 3.2 + 4.0 (three specifications).
V.
BIPV Light Transmittance
0%: Opaque, highest efficiency (Source: Douyin); 20%: Low transmittance, high privacy (Source: Douyin); 40%: “Golden ratio,” suitable for 90% of scenarios (Source: Douyin); 60%: High transmittance, suitable for daylighting needs (Source: Douyin); CdTe: Cadmium Telluride (CdTe) power-generating glass (Source: Douyin)—BIPV: 0 + 20 + 40 + 60 (four levels).
VI. Selection Criteria
Roof Type: Choose single-glass for color steel tile roofs (Source: Douyin); Roof Material: Choose double-glass for concrete roofs (Source: Douyin); Certification: ISO9001 certified (Source: Alibaba); Light Transmission: 92% solar transmittance (Source: yilinglass); Environmental Standards: Non-toxic formula meeting EU/Japanese standards (Source: huangxinhui8) — Selection: Roof type + Double-glass + Light transmission (Three key checks).
VII.
Procurement Recommendations
First, specify ultra-clear glass (low-iron, 91% transmittance); second, choose single or double-glass (based on roof type); third, add AR coating (3–4% gain); fourth, check thickness (3.2mm);
fifth, verify certification (ISO9001) — Glass: Ultra-clear + Single/Double + Coating (Three key points).
