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Snow makes your panels produce MORE (counterintuitive but true)

After snow clears off, panels produce 5-15% MORE for days. The albedo effect: snow reflects light onto the panel. Why it happens.

Published on 2026-05-153 min read

Intuition says: snow = darkness = less production. Technical reality is exactly the opposite in many cases. Snow reflects light like a giant white mirror onto the panels.

The albedo effect

Albedo = percent of light a surface reflects. Asphalt: 5%. Grass: 25%. Fresh snow: 80-90%. With snow on ground around panel, it captures direct radiation + reflected from white surroundings.

Measured production increase

Studies in Switzerland, Canada and Vermont: production 5-15% higher than equivalent day without snow. Bifacial panels (sensitive both sides): up to 30% extra. Bright white ground = double light harvest.

When it happens

Sunny day after snowfall. Ground covered in fresh snow at least 16 ft around panel base. Clean panel (no snow on top). Clear sky. Cloudy: effect cancels.

Cold: the other bonus

Panels at 32 °F produce 8-12% more than at 77 °F (nameplate). Plus albedo: sunny winter day with snow can produce AS MUCH as summer day, paradoxically.

The cold-climate trick

Designers in Canada and northern Europe specify bifacial panels on elevated rack (5 ft) in snow zones. Annual production 15-20% above standard flush panels. Yes: snow is asset, not liability.

Watch out: snow on top of panel

Snow covering the panel: 0% production. Remove manually with long-handled brush (NOT metal scraper, scratches glass). >30° pitch usually lets snow slide off in sun.