Germany
Bronze until more of its leads are mapped in OpenStreetMap. Arrays of about 400 m² and up are checked against Germany's register (MaStR); the small-installation estimate below that is not yet validated. Silver also needs leads mapped in OpenStreetMap to localize the model: about a third of the 14,535 places the model found solar that OpenStreetMap does not have yet, and of its 581 very large outlines.
You can help: download the lead file under Download the data behind this atlas and work down it from the top on recent imagery, mapping every real installation. Once about a third has a verdict, the model is retrained on what you mapped and the atlas shows Silver.