TL;DR
Tilt angle is the angle between a solar panel's surface and the horizontal plane, one of the two geometry settings, with azimuth, that determine how much sunlight the array intercepts over a year. Fixed rooftop systems simply inherit the roof pitch, while ground mounts are commonly set near the site latitude for balanced annual production, shallower to favor summer or steeper for winter and snow shedding.
What it means
Tilt angle is the angle between a solar panel's surface and the horizontal plane, one of the two geometry settings, with azimuth, that determine how much sunlight the array intercepts over a year. Fixed rooftop systems simply inherit the roof pitch, while ground mounts are commonly set near the site latitude for balanced annual production, shallower to favor summer or steeper for winter and snow shedding. A few degrees off optimal usually costs only single-digit percentage yield, so production modeling matters more than chasing the perfect number.
Where it sits in the glossary
Tilt angle is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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