Solar backsheet suppliers: choosing between Lucky Kpct1 and Cpct1

Start with the qualification point

Lucky Kpct1 and Lucky Cpct1 are transparent solar backsheets for module designs that need a light-transmitting rear layer. For solar backsheet suppliers, the practical choice depends on which requirement leads your qualification plan: Kpct1 supplies specific optical, UV, thermal-cycle, and corrosion-test figures, while Cpct1 centers on its fluorinated coating film, EVA interface, thermal stability, and named PV applications.

We compare the two materials across construction, environmental performance, application fit, and quality control. The comparison helps you prepare the module details that should accompany a quotation request.

Layer construction and optical properties

Lucky Kpct1 uses a transparent PVDF film as its weather-resistant layer. Visible-light transmittance exceeds 90%, and UV blocking efficiency is above 99%. A specially treated surface provides self-cleaning functionality. The material also passes a 3000-hour dual 85 test and is suited to high-efficiency modules where anti-PID performance is part of the design review.

Lucky Cpct1 uses fluorinated coating film technology in its adhesive layer. The coating forms a stable bonding interface with EVA encapsulant and maintains long-term thermal stability within module operating temperatures. Its design also includes hot-spot endurance and UV aging resistance exceeding 120 kWh/m².

These construction details point to different first checks. Kpct1 gives a module designer measurable optical and UV screening points. Cpct1 puts the bonding layer at the center of the review, so the EVA encapsulant and expected operating temperature should be identified early.

Adhesion and environmental conditions

Kpct1 uses a fluorinated coating cured adhesive layer that is compatible with various EVA materials. Bond strength retention exceeds 95% after thermal cycling between -40°C and 85°C. The adhesive layer resists delamination in humid and hot environments and passes salt-spray and ammonia corrosion tests.

Cpct1 forms its EVA bonding interface through fluorinated coating film technology. Its stated performance profile includes reliable adhesion, long-term thermal stability within module operating temperatures, hot-spot endurance, and UV aging resistance above 120 kWh/m².

For a coastal or agricultural project, Kpct1 gives you a direct comparison point for salt spray, ammonia, humidity, and thermal cycling. For a module qualification review focused on encapsulant bonding and hot-spot exposure, Cpct1 gives you the layer design and environmental focus to place beside the EVA and module structure.

Where each material fits

Kpct1 suits utility-scale solar power plants, commercial and industrial distributed projects, coastal power stations with high humidity, high-irradiation desert regions, and special structures such as double-glass modules. Its transparent PVDF layer and visible-light transmittance are relevant when the module design requires light transmission through the backsheet.

Cpct1 suits bifacial modules in utility-scale solar farms, commercial and industrial distributed PV projects, agri-PV and fishery-PV hybrid projects, and climate zones with high irradiation or humidity. Its transparent construction and EVA bonding interface fit designs where rear-side light access and encapsulant compatibility are part of the material review.

Picture the selection in two working situations. A desert-project team reviewing Kpct1 can place its visible-light transmittance, UV blocking, and dual 85 result alongside the project qualification plan. An agri-PV or fishery-PV team reviewing Cpct1 can place the transparent construction, EVA interface, thermal stability, and UV aging resistance beside the expected humidity and irradiation conditions.

Quality control and repeat-order checks

Kpct1 production includes raw material inspection, full-process production monitoring, 100% critical performance testing, regular accelerated-aging sampling, and complete quality traceability records.

Cpct1 production uses high-precision coating equipment for uniform film application, batch-by-batch testing of critical performance parameters, and a comprehensive quality traceability system.

The two control approaches give procurement teams different records to align with a module qualification plan. Kpct1 places specific attention on incoming materials, process monitoring, critical testing, and accelerated aging. Cpct1 places specific attention on coating uniformity, batch testing, and traceability. For repeat orders, ask us to match the requested batch records and test items to your approved module structure.

Compare the material against your module design

Choose Lucky Kpct1 when your decision is led by a transparent PVDF weather-resistant layer, visible-light transmittance, UV blocking, thermal-cycle bond retention, or salt-spray and ammonia exposure. Choose Lucky Cpct1 when your decision is led by fluorinated EVA bonding, thermal stability, hot-spot endurance, or use in bifacial, agri-PV, and fishery-PV projects.

Send us the module structure, EVA grade, required environmental tests, target roll dimensions, and annual quantity so we can prepare a quotation around the selected backsheet.