Production-line cell efficiency for Smax Energy’s N-type TOPCon platform has been independently certified at 25.6%, with sustained yield across multiple wafer batches and processing campaigns. The figure was verified under standard test conditions using TÜV Rheinland-accredited measurement equipment.
The 25.6% figure represents an average across qualifying cell batches rather than a single best-cell outlier, an important distinction for EPC contractors and developers evaluating module-level performance for project pipelines.
What 25.6% cell efficiency means at module level
Cell efficiency is the upstream metric that determines module-level performance. At the module level, the 25.6% TOPCon cell efficiency translates into the 23.0–23.2% peak module efficiencies currently quoted across the higher-power variants of the SMX-M and SMX-N families.
The headline gain comes from three areas of process improvement:
- Refined rear-side passivation through tighter control of the polysilicon deposition step
- Improved diffusion profiles in the boron emitter formation, reducing surface recombination
- Tighter wafer qualification gates upstream, with lower allowable oxygen content and tighter resistivity windows
“Cell efficiency is only useful if it survives the move from R&D lab to volume production without falling apart,” said a Smax Energy technical representative. “What we’re publishing is what the production lines are running, not a hero number from a one-off test wafer. Cell-to-module loss is the real number that determines what an EPC sees in the field.”
Independent verification by TÜV Rheinland
The qualification work was performed under controlled conditions and verified by TÜV Rheinland. Key elements of the certification protocol:
- Standard test conditions: AM1.5 spectrum, 1000 W/m² irradiance, 25°C cell temperature
- Multiple wafer suppliers sampled, including the company’s own in-house wafer line
- Multiple production campaigns over a sustained period to verify consistency, not single-batch outliers
- Standard environmental and accelerated lifetime testing per IEC 61215 and IEC 61730
- Bifaciality factor verification on the rear-side measurement, supporting the SMX-N Series rear gain calculation
TOPCon and HJT running in parallel
The 25.6% TOPCon production efficiency places Smax Energy’s platform in line with current best-in-class N-type cell manufacturers. The company’s parallel HJT line continues to run higher-efficiency variants at lower production volume, supporting the 730W modules across the SMX-M and SMX-N ranges.
Module-level efficiency, power tolerance, and full IEC test certification details are available on the individual datasheets for the SMX-M Series and SMX-N Series. For detailed cell technology specifications, the Technology page provides full architectural information.