Assess the yield impact of panel orientation away from true south or north.
Azimuth matters less than most people expect: east or west facing arrays typically lose only 15 to 20 per cent against due south. Steeper tilts make orientation matter more. East-west split arrays produce a flatter daily curve that often matches consumption better than a single south-facing array, despite lower total yield.
Solar Azimuth
Yield loss rises roughly with the square of azimuth deviation, scaled by tilt
Yield loss rises roughly with the square of azimuth deviation, scaled by tilt Azimuth matters less than most people expect: east or west facing arrays typically lose only 15 to 20 per cent against due south. Steeper tilts make orientation matter more.
East-west split arrays produce a flatter daily curve that often matches consumption better than a single south-facing array, despite lower total yield.
This calculator takes 3 inputs: Site latitude, Panel azimuth from true north, Panel tilt. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.