Perovskite Solar! Prof. Michael Gratzel switched from DSSC to being a major proponent of PQD a few years ago and has co-authored advanced papers on PQDSC like "Air Processed Inkjet Infiltrated Carbon Based Printed Perovskite Solar Cells with High Stability and Reproducibility". Solterra is planned as an inkjet printing roll-to-roll production for high volume. I would be severely underestimating the cost difference between PQDSC and Silicon Panels if I said it was 5 times less costly, especially made in India. At 5 time less, we would see record breaking sales, at 10 times less we are getting to "save the world" pricing. PQDSC can be produced at a fraction of the cost of current tech.