Size.Solar
Calculated solar panel tilt angle in Manchester
We analysed solar production across a range of tilts (23° to 83°) to find the optimal settings for your location. The more frequently you adjust your panels, the greater the potential energy gain.
35°
Set it once for the entire year. The simplest approach.
Method: Polynomial regression on annual production data.
Winter: 39°
Summer: 31°
Provides a -0.0% gain over the best fixed tilt.
Method: Decoupled regression on 6-month seasonal data.
Offers a 2.6% gain over the best fixed tilt.
Method: Decoupled regression on 3-month seasonal data.
Achieves the maximum 3.3% gain over the best fixed tilt.
Method: Decoupled regression on monthly data for ultimate optimization.
*Tilt angles are relative to horizontal. For Manchester, positive angles face South and negative angles face North. Gains are estimates based on modeling.
Quote-ready tilt decision
Give installers one fixed-angle target first
Start the quote conversation with 35° South. Seasonal adjustment is only worth pricing if a supplier can show that roughly 2.6% extra production beats the cost, access risk, and warranty complexity of adjustable frames.
Base quote
35° South
Best default for normal roof-mounted systems and the first number to send to installers.
Adjustable option
Winter: 39° South
Summer: 31° South
Four seasonal changes model about 2.6% gain. Monthly adjustment models about 3.3%.
Installer checks
Roof pitch, available rail angles, wind loading, waterproofing, access for cleaning, and whether adjustment affects warranty.
Direction check
In Manchester, the practical target is a south-facing array. Shade-free roof space, inverter sizing, and battery goals usually matter more than small angle differences.
Annual production by strategy
Monthly performance breakdown
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