SEG Solar and Astronergy supplied new tunnel oxide passivated contact (TOPCon) modules, alongside an n-type back-contact sample from Aiko, for installation in the first week of March 2025. To add these new products to the comparison table in these results, we removed the production data from before March 7.
Due to downtime for system upgrades, we also did not capture data for three days in March and therefore had to remove those days from the total energy yield calculation. Finally, three products using 210 mm square cells were removed from the data, as we identified anomalies in the production figures caused by the maximum power point tracking algorithm. The data from those products will be reported again as soon as the issues are resolved.
| Installation Month | Product | Type | Feb. 2025 Wh/Wp | Feb. 2025 rank | March 2025 Wh/Wp | March 2025 rank | ||
|---|---|---|---|---|---|---|---|---|
| 60 | Dec. 2024 | Runergy HY-DH144N8-570 | Bifacial n-TOPCon | 172.78 | 1 | 144.06 | 1 | |
| 62 | Mar. 2025 | SEG Solar SEG-BTC-600-BG | Bifacial n-TOPCon | / | / | 143.36 | 1 | |
| 63 | Mar. 2025 | Astronergy CHSM66RN(DG)/F-BH-615 | Bifacial n-TOPCon | / | / | 142.88 | 1 | |
| 61 | Dec. 2024 | JA JAM72D42-615/LB | Bifacial n-TOPCon | 170.91 | 1 | 142.77 | 1 | |
| 56 | Dec. 2024 | Longi LR5-72HGD-585M | Bifacial n-TOPCon | 170.89 | 1 | 142.57 | 1 | |
| 50 | Dec. 2024 | Astronergy CHSM72N(DG)/F-BH-580 | Bifacial n-TOPCon | 171.03 | 1 | 141.75 | 2 | |
| 64 | Mar. 2025 | Aiko AIKO-G640-MCH72Dw | Bifacial n-back contact | / | / | 141.53 | 2 | |
| 59 | Dec. 2024 | DMEGC DM605G12RT-B66HSW | Bifacial n-TOPCon | 169.91 | 1 | 141.37 | 2 | |
| 53 | Jan. 2025 | SEG SEG-575-BTA-BG | Bifacial n-TOPCon | 169.24 | 2 | 140.85 | 2 | |
| 57 | Dec. 2024 | AE AE570CMD-144BDS | Bifacial n-TOPCon | 170.52 | 1 | 139.94 | 2 | |
Monthly highlight
Aiko’s n-type back-contact product took second place, according to energy yield criteria. That may be due to the bifaciality factor of this module being about 70%, whereas front-contact, bifacial TOPCon modules have 80% bifaciality. On the other hand, the back contact module has a better temperature coefficient, which reduced thermal losses. The impact of those parameters on the energy yield depends strongly on site and climate specifics and would change in different locations and system configurations. 
George Touloupas
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