Tegrona Lite Tegrona

Tegrona Lite turns a photograph of a roof into a solar panel layout with real dimensions. You mark one roof face on a drone shot, an aerial view or a plan, and the app removes the perspective and reads the scale from the roof tile courses themselves, so no tape measure, site survey or address lookup is needed. Auto-fill places the modules around chimneys, dormers and skylights drawn as exclusion zones, with the edge setback set in centimetres, and reports module count, system power in kWp, covered area and the mid and end clamp counts. The result exports as an A4 spec sheet in PNG or PDF with the layout drawn over the original photograph; projects are saved as .solar files that also open in the macOS and browser versions. It is layout software, not a full PV design suite: there is no 3D model, no yield simulation, no string design and no bill of materials. Free, with no account, no trial timer and no module limit. The photograph never leaves the machine; the app sends anonymous usage statistics that can be switched off in the settings.