1. Technical challenges for the optimum penetration of grid-connected photovoltaic systems: Spain as a case study. (January 2020) Authors: Colmenar-Santos, Antonio; Linares-Mena, Ana-Rosa; Molina-Ibáñez, Enrique-Luis; Rosales-Asensio, Enrique; Borge-Diez, David Journal: Renewable energy Issue: Volume 145(2020) Page Start: 2296 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗