What direction do solar panels need to face?

One of the first questions people ask is: which way should solar panels face? In the UK, the answer is clear. Solar panels should face south to achieve maximum efficiency.

This direction allows the panels to capture the most sunlight throughout the day, as the sun moves from east to west across the southern sky.

South-facing solar panels tend to produce the highest energy output year-round. However, if a south-facing roof isn’t available, don’t worry, you don’t need to move just yet! Panels facing south-east or south-west can still perform very well, and even east- or west-facing panels can be effective with only a slight drop in efficiency.

‍

What’s the best angle for solar panels?

‍When it comes to the best angle for solar panels, orientation is only half the story. The tilt angle (or the vertical angle at which the panels are mounted) has a major impact on performance.

In the UK, the optimum angle for solar panels is typically between 30° and 40°. This allows them to absorb the most sunlight, especially during spring and autumn when the sun is at a moderate height in the sky. A 35° tilt, facing due South, often provides a great balance for year-round energy generation.

On pitched roofs, the angle is usually determined by the roof’s slope. However, if you’re installing on a flat roof or the ground, mounting systems can be adjusted to achieve the optimum angle for your location and system size.

‍

Should solar panels face south in UK homes?

Yes, solar panels should face south in UK homes whenever possible. This is due to the UK’s position in the northern hemisphere, where the sun’s path is always to the south. South-facing panels receive the most consistent and direct sunlight throughout the day.

However, your system’s performance will also depend on roof pitch, potential shading, and your energy usage habits. Even with an east- or west-facing roof, a solar installation can still offer a strong return on investment, especially when paired with battery storage to maximise self-consumption.

‍

In summary, Getting the direction and tilt right is essential to maximising your solar panel investment. In the UK, the answer to which way solar panels should face is almost always south, typically at a 35° angle. This should make sure you’re well on your way to generating clean, cost-effective electricity year-round.

At Thermly, we help UK homeowners find the most efficient solar setup for their property. We also advise on complementary green tech, such as batteries, to help maximise your output. Contact us today - we’re here to help you make the smartest choice for long-term savings

‍