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SESK: Stuff Everyone Should Know · sesk.info/solar-growing-trees

What future shading risk does DOE tell homeowners to think about before installing solar?

Growing trees that could shade the system later.

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  1. Your or your neighbor's growing trees ✔
  2. Seasonal bird nests
  3. Low-flying clouds

Why: A tree that is small today may block the sun in ten years. Shade can cut the output of panels, especially on string systems.

Huh, didn't know that: DOE also lists orientation and tilt among the main design factors.

The dad joke
How did the trees feel after winter when the sun was shining bright again? They felt releaved.
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References

Answer: Your or your neighbor's growing trees. A tree that is small today may block the sun in ten years. Shade can cut the output of panels, especially on string systems.

  1. DOE Energy Saver: Planning for a Home Solar Electric System www.energy.gov/energysaver/planning-home-solar-electric-system
    consider your own or your neighbor's trees that are still growing and could shade your system in the future
    Checked 2026-10-10.

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Test yourself in the game

Home & YardWhy should you check a roof's shading at different times of year before going solar?Home & YardWith a string inverter, what happens if one panel on the string is shaded?Home & YardOn thick cloudy days, how much can the direct beam of sunlight be reduced?

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