BCZenn Bifacial

Bloomchroma BCZenn Bifacial Back-Contact Solar Panels for Utility and C&I Assets

Half-cut back-contact cell with glowing circuit traces

132 Half-Cut Back-Contact Cells

Impact resistance: 35 mm

Impact Resistance

Temperature coefficient: -0.26 %/°C

Temperature Coefficient

Two silver-framed bifacial solar modules standing side by side

75% Bifaciality (+/-10%)

Corner of a framed glass-glass solar module

2.0 mm Framed Glass-Glass Construction

Solar module surface under falling snow and water droplets

5400 Pa Snow Load 2400 Pa Wind Load

Market-Leading Efficiency

Back-contact design eliminates front gridline shading unlocking market-leading efficiency and maximum power density

BC-Z66G

665W Max. Module Power

24.6% Max. Module Efficiency

Advanced Hot Spot Protection

BC architecture enables cell level bypass under shade, suppressing hot spot formation to maximize safety and power output

BCZenn module under single-cell shading: only the shaded cell is bypassed
versus
Regular module under single-cell shading: a whole cell string loses output

BCZenn

Single-cell shading activates localized current bypass, confining power loss strictly to the shaded area

Regular Module

Single-cell shading risks hot spot formation or full-string bypass activation, decreasing power output across entire cell strings

Optimized Temperature Coefficient

A low temperature coefficient minimizes heat-induced power drop keeping energy production high when roof temperatures peak

-0.26% / °C Pmax temperature coefficient
Power Performance vs Temperature chart: output power from 25 °C to 80 °C, BCZenn -0.26%/°C vs TOPCon -0.29%/°C; BCZenn stays ahead by +1.1% at 60 °C, +1.4% at 70 °C and +1.7% at 80 °C (85.7% vs 84.0%)

Microcrack Risk Mitigation

Rear-side interconnects reduce solder joint stress to mitigate micro-cracks and boost long-term durability

TOPCon cell: S-shaped front ribbons stressing the cell edge
versus
BCZenn cell: rear-side interconnects, no ribbon across the cell edge

TOPCon

BCZenn