1. Typically.: 7–9% more energy per watt, BEW/DNV engineering. SunPower Yield Report. (Jan 2013)
2. Campeau, Z., et al.: SunPower Module Degradation Rate, SunPower white paper, Feb 2013, Jordan, Dirk SunPower Test Report, NREL. (Oct 2012)
3. Verlinden, P.J., Swanson, R.M., Crane, R.A.: 7000 High Efficiency Cells for a Dream. Prog Photovoltaics Res Appl 2, 143–152 (1994)
4. SunPower Module 40-Year Useful Life, SunPower white paper, Feb 2013. Useful life is 99 out of 100 panels operating at more than 70% of rated power
5. Gxashekaa, A.R., van Dyka, E.E., Meyer, E.L., Evaluation of performance parameters of PV modules deployed outdoors. Renew Energ 2005, 30:611e20 (2005)