Nemet, G. F., O'Shaughnessy, E., Wiser, R., Darghouth, N., Barbose, G., Gillingham, K., Rai, V. (2017): Characteristics of low-priced solar PV systems in the U.S. - Applied Energy, 187, 501-513.https://doi.org/10.1016/j.apenergy.2016.11.056