Roof area · solar · rainwater
Measure a roof and estimate its potential
Search for a property, verify its roof outline, then calculate a planning estimate using public building, climate, and solar datasets. Solar results are screening technical potential, not a recommended system size.
1. Find the property
Search happens only when you press Search; there is no background address tracking.
2. Verify the roof outline
Use the polygon control at the upper right to draw, edit, or delete an outline. Suggested OpenStreetMap geometry can be incomplete or select a nearby building.
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Search for an address, then find or draw its roof outline.