In this example, you optimize the placement of solar panels on the roof of a building.
The optimal location for roof-top solar panels is where they receive the most sunlight. After applying sunlight to a model of a building, you can create a solar access study to determine the placement of the solar panels. For this example, the building has an HVAC shed on the roof, which produces shade, and you cannot place the panels on the shed.

You perform the following tasks:
- Open a model of a building with solar panels on the roof.
- Apply sunlight to the model on the winter solstice.
- Create a fixed date, variable time solar access study.
- View the study results and adjust the solar panel positions to minimize shadows on the panels.