Technology introduction

The MWT is an advanced back contact technology to increase solar cell and module efficiency by eliminating the busbar on the front side, and deploy both positive and negative electrodes on the rear side.

  • Without busbars,decreasing shading area by 3%
  • 15W module power output higher than industry average
  • Eliminating the micro crack and degradation caused by string ribbons
  • Compatible with most of cell types including TOPCON, PERC, HIT, etc.

Why choose Sunport Power&MWT?

Sunport Power has successfully developed and patented high efficient solar cells and modules based on next generation MWT (metal wrap through) technology with GW-scale production capacity.

Technology Comparison

Compared with conventional module, MWT modules reduce 3% shaded area with no busbars. MWT module technology replaces string ribbon by conductive back sheet, abandoning strain, micro-crack and results power degradation, greatly improving stability and reliability.

— Structural Feature —


Positive and negative electrodes are both on the rear side of solar cell


Positive and negative electrodes are located on opposite sides of the cell

— Cell Structure —


Busbar-free design exhibits higher power output by decreasing shading area up to 3 %


Conventional design covers more cell surface from the main busbars, therefore the power output is limited

— Module Encapsulation —

Replace conventional soldering with conductive foil and 2D encapsulation structure

1.Avoiding strain and micro cracks due to the conventional high temperature soldering, single glassed module life cycle increased up to 30 years.
2.Lower encapsulation loss, increase module efficiency
3.Lower operating temperature, higher output
4.Better choice for ultra thin wafer applications
5.Aesthetic Design, lead free

Conventional Cells connected by string ribbons

1.Encapsulation strains, micro-crack and power degradation lower life-cycle to 25 years
2.Limit on the wafer thickness reduction
3.Single design unmatched the BIPV
4.Increased eco-pressure and heavy lead contents

2021~2023 Product Roadmap