This guide explains the best direction for solar panels in the UK, with approximate output for each orientation compared with an ideal south-facing roof. It also covers why an east-west system can suit some households better, and whether north-facing panels are worth fitting.
Quick answer: South-facing is best in the UK and gives the most energy over a year. South-east and south-west roofs lose only around 5%, and east or west roughly 15 to 20%. North-facing panels on a typical pitched roof may produce only about 55 to 65% of a south-facing system, depending on the pitch.
Why does direction matter?
In the UK, the sun is always in the southern half of the sky at midday, so panels facing south receive the most direct light over a year. Panels facing other directions still produce, because they collect light from much of the sky, but they get less direct sun.
Output by roof direction
Approximate yearly output compared with south, for a roof pitched at around 35° in southern England. Your exact figures depend on location and pitch; PVGIS can give your own.
| Direction | Output vs south | 4 kWp system, approx. kWh a year |
|---|---|---|
| South | 100% | 3,800 |
| South-east or south-west | about 95% | 3,610 |
| East or west | about 80 to 85% | 3,040 to 3,230 |
| North-east or north-west | about 65 to 75% | 2,470 to 2,850 |
| North | about 55 to 65% | 2,090 to 2,470 |
Is east-west better than south?
For total energy, no. But an east-west system spreads generation across the day, with more in the morning and late afternoon and less at midday. If you use more electricity at those times, or want to charge an EV or battery over a longer window, you may use more of the output at home, which is worth more than exporting it. Many east-west systems also fit more panels on a roof.
Should you put panels on a north-facing roof?
It depends on the pitch and your costs. On a shallow north roof the loss is smaller. On a steep north roof it is large. With panel prices lower than in the past, some households add north-facing panels to boost summer output, but each panel pays back more slowly.
What else matters as much as direction?
- Shade from trees, chimneys and neighbouring buildings.
- Tilt, ideally about 30 to 40° in most of the UK.
- Where you are; the south of England gets more sun than Scotland.
Frequently Asked Questions
Which direction should solar panels face in the UK?
South, for the most energy. South-east and south-west are almost as good.
Are east-west solar panels worth it?
Yes for many homes; they produce around 15 to 20% less in total but spread output across the day.
Do north-facing solar panels work?
Yes, but they usually produce much less and take longer to pay back.
How much do I lose with a west-facing roof?
Roughly 15 to 20% compared with south.
Checked November 2026 by the Solaxyra Editorial Team. Sources: PVGIS (European Commission), Energy Saving Trust: Solar panels.