Solar Resource, Tilt & Azimuth (Topic 1) in Module 4 – Solar-PV-NABCEP-Associate (BG)

Solar Resource, Tilt & Azimuth

PV output depends on how much sunlight reaches the modules and how directly it hits the surface.

  • Tilt: angle from horizontal
  • Azimuth: compass direction the array faces

Big picture

  • In the Northern Hemisphere, arrays often face generally south for strong annual production (specifics depend on site goals).
  • Steeper tilt can favor winter production; lower tilt can favor summer production and shed less wind load (site-dependent).
  • Flat roofs often use racking to achieve a target tilt while considering wind and roof constraints.
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Solar Resource, Tilt & Azimuth

How orientation affects PV production

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Solar Resource, Tilt & Azimuth

PV output depends on how much sunlight reaches the modules and how directly it hits the surface.

  • Tilt: angle from horizontal
  • Azimuth: compass direction the array faces

Big picture

  • In the Northern Hemisphere, arrays often face generally south for strong annual production (specifics depend on site goals).
  • Steeper tilt can favor winter production; lower tilt can favor summer production and shed less wind load (site-dependent).
  • Flat roofs often use racking to achieve a target tilt while considering wind and roof constraints.