Assess the shade on your roof
More sunlight means more power is generated, so shade can significantly affect the performance of solar panels installed. Observe the shade patterns on your roof throughout the day to identify any trees, buildings, or structures that cast shadows.
While extensive shading might make your roof unsuitable for solar panels, intermittent shadows cast by the early morning sun or late afternoon could be manageable, providing sufficient sunlight for most of the day.
In addition to the shade, be aware of potential obstructions that may affect panel placement or efficiency, such as roof vents and skylights.