
A few degrees in tilt and azimuth can move annual yield noticeably. Rooftops lock you to the house pitch and direction, sometimes splitting arrays to capture morning and afternoon sun. Ground mounts let you optimize for your latitude, reduce mismatch, and favor winter production when heating loads or short days dominate.

Photovoltaic modules dislike heat. Rooftop installs can run warmer, especially on dark shingles with limited airflow, slightly trimming efficiency on hot afternoons. Ground mounts breathe better, often operating cooler and delivering steadier output through heatwaves. The difference is subtle day‑to‑day but adds up across long summers and decades of service.

Pitched roofs shed snow well, but clearing stubborn drifts safely can be tricky. Ground arrays invite careful brushing without ladders, encouraging more frequent cleaning after dust storms, pollen waves, or wildfires. A little attention restores light, preserves production, and can extend inverter headroom when clouds or cold deliver unexpectedly strong bursts.