Spectral correction in yield forecasts for 2T perovskite-silicon tandem modules

Dr. Malcolm Abbott from PV Lighthouse presents research on integrating spectral correction into yield forecasting software for two-terminal perovskite-silicon tandem solar modules. The presentation demonstrates that spectral effects are significantly stronger for tandem cells (approximately 4x compared to PERC cells), leading to potential 5% errors in annual energy yield predictions if not properly accounted for.

Key findings include:

• Developed thermal modeling approaches for tandems based on measured temperature coefficients
• Showed reduced bifacial gain compared to conventional silicon modules
• Analyzed the impact of inverter clipping on spectral corrections
• Demonstrated methods to calibrate existing software like PVSyst for tandem technologies

The work addresses the need for accurate yield forecasting tools as perovskite-silicon tandems move toward commercial deployment, providing both detailed physics-based modeling through SunSolve and practical approaches for industry-standard software integration.

This project received funding from the Australian Renewable Energy Agency (ARENA) as part of ARENA’s Advancing Renewables Program. The views expressed herein are not necessarily the views of the Australian Government, and the Australian Government does not accept responsibility for any information or advice contained herein.