Fig. 4: Scatter plot illustrating the ratio between potential rooftop PV electricity generation and current final electricity consumption for each MS, plotted against the rooftop technical installed capacity GWp.
From: Mapping Europe’s rooftop photovoltaic potential with a building-level database

Bubble size represents the total potential electricity generation per country TWh yr−1, and bubble colour indicates the share of PV potential generated from RBs. See https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Tutorial:Country_codes_and_protocol_order for country abbreviations.