Solar Panel Tilt Angle: The Best Angle for Your State

The rule of thumb

Optimal tilt is roughly your latitude for year-round production: about 30° in Texas, 33° in New York, 40° in Minnesota. Facing true south (within 20–30° either way) costs little; facing east or west keeps about 83% of production, not the 50% many people fear.

Roof pitch vs perfect tilt

Most roofs are 4:12 to 6:12 pitch (18–27°), which is shallower than ideal in northern states. That costs roughly 5–10% of production — usually not worth paying for tilt racks on a standard home. Ground mounts can optimize tilt freely.

When winter production matters

If you want to maximize winter output (snowy states, heat pumps), add 10–15° to your tilt. If you want peak summer production (high AC use), subtract 10–15°. Use the PVFig system size calculator for your state's baseline.

What is the best angle for solar panels?

About your latitude, facing true south. Most fixed-roof systems use the roof pitch (18–27°) and lose only 5–10% vs perfect tilt.

Does solar panel angle matter a lot?

Within reason, no — ±20° from optimal costs only a few percent. East/west orientation keeps ~83% of south-facing production.

Should I adjust tilt for winter?

Add 10–15° if winter production is your priority (heat pumps, snow). Otherwise latitude is fine.