Add a 1 m LiDAR DSM (for example the free Environment Agency composite) and building outlines, and the model works out the pitch and direction of every roof cell, classes it as south-facing, east or west facing, flat or unsuitable, and gives each building its suitable roof area, an indicative peak power and an indicative yearly generation, with east and west roofs reduced by the loss you set. Defaults follow Energy Saving Trust guidance and the README lists PVGIS yields for seven UK places so you can set your own. No plugins or internet needed. Screening only: shading and roof structure are not modelled.
Eight Bozmaps QGIS models in one zip: flood, landslide, wildfire, NDVI, NDVI change detection, land surface temperature, OSM map generator and vegetation vulnerability.
Screens how far inland a tsunami of a height you choose could reach, from a DEM, a coastline and land use roughness, using the published Berryman height-loss method.
Zone of Theoretical Visibility for a proposed wind turbine, mast or tall building, with visible area by distance band and the buildings that can see it.