What Causes Shading on Your Roof?

Select a shading source, then describe its position and severity. You can add multiple sources.

Trees
Building
Chimney
Dormer
Aerial/Dish
Vent/Pipe
Where is the shade source relative to your panels?
NW
N
NE
W
ROOF
E
SW
S
SE
When does it cast shade on your panels?
Morning
Midday
Afternoon
All Day
How severe is the shading?
Light Dappled or edge only
Partial 1-3 panels affected
Heavy Dense, multiple panels

No Shading At All?

If your roof is completely unshaded throughout the day, you're in an ideal situation.

Estimated Annual Generation Loss
0%
No Impact
0% (Ideal) 50%+ (Severe)

Seasonal Variation

Winter

0%

Low sun = long shadows

Spring

0%

Improving

Summer

0%

High sun = short shadows

Autumn

0%

Declining

Recommendations

What This Means in Practice

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These are estimates based on typical UK conditions. Actual shading impact depends on exact positioning, roof angle, and local factors. A professional installer can provide precise analysis using shading simulation software or drone surveys.