Emmvee unveils TOPCon module with four-cut cell design

Indian PV manufacturer Emmvee has unveiled a TOPCon solar module featuring a four-cut cell design at Renewable Energy India Expo (REI) 2026. The module delivers 640–650 W, 25–30 W more power than conventional half-cut modules of the same dimensions, according to the company. Emmvee also showcased a 2,000 V DC solar module aimed at reducing balance-of-system costs.

The quarter-cut TOPCon module has each solar cell divided into four sections, compared with the two sections used in conventional half-cut modules.

Each section carries one quarter of the module current, reducing resistive losses in the cell interconnections. The module also uses cell overlap, or negative cell placement, to improve space utilisation and increase power output without increasing module dimensions, according to Emmvee.

The module is designed with a lower temperature coefficient. This means the module loses less power as its temperature rises, helping maintain higher power output in hot conditions. The design is also expected to reduce heat generated within the module during operation. Another benefit is the improved performance under shading. The smaller cell sections help limit the area affected by shading and hotspots and thereby allowing the module to maintain approximately 85% performance compared with 75% for conventional modules. 

Also, over the longer term, the new module is engineered to retain its power-generating capacity better. Typically, half-cut modules have a power degradation rate of 1% in the first year and 0.4% annually from the second year onwards. The quad-cut module has a degradation rate of 0.35% in the corresponding time frame. It is designed to retain the same general electrical specification class as the existing half-cut product, according to Emmvee. 

Emmvee’s 2,000 V DC PV module allows more modules to be connected in each string, reducing the number of strings, cables, trenches and electrical components required across a project.  This lowers installation time, labour requirements and balance-of-system costs. By carrying the same power at lower current, it also reduces energy losses that happens on DC cables, helping more of the electricity generated by the modules reach the grid. “The new module requires fewer inverters, and combiner boxes simplifying plant design and maintenance. In fact, it helps lower the levelized cost of electricity (LCOE) by 1.8%,” stated the company.