Best Direction for Solar Panels in the UK (2026 Guide)

Your roof's direction isn't the only thing that determines whether solar panels are worth it. In fact, according to data from the Microgeneration Certification Scheme (MCS), panels just 45° off from due south still produce around 94% of maximum output. That's the difference between a perfect south-facing roof and a south-east or south-west one — and it's smaller than most people think.

This guide explains exactly which direction solar panels should face in the UK, what the MCS data says about angle and orientation, and what to do if your roof isn't ideally positioned.

Quick Answer: Which Direction Is Best?

The best direction for solar panels in the UK is due south. Facing your panels south maximises the hours of direct sunlight they receive, as the sun tracks through the southern sky throughout the day.

That said, most UK roofs are well-suited to solar:

• South-facing: Ideal — 100% of potential output
• South-east or south-west (up to 45° off south): Excellent — approximately 94% of peak output
• East or west-facing: Still productive — around 80–85% of south-facing output
• North-facing: Generally not recommended for the UK

If your roof isn't perfectly south-facing, don't rule solar out. The difference is far smaller than most people expect, and a survey from an MCS-accredited installer will give you a personalised assessment.

Why Direction Matters for Your Solar Output

Solar panels work by converting light into electricity. The more direct sunlight they receive, the more they generate — so position matters.

In the UK, the sun rises in the east, arcs through the southern part of the sky, and sets in the west. Panels facing south are exposed to the sun for the longest period of the day, across all seasons.

But here's what surprises many homeowners: the UK's cloudy weather actually helps. A significant proportion of UK solar energy comes from diffuse light — sunlight scattered through cloud cover and atmosphere. Diffuse light is less direction-dependent than direct sun, which is why panels on east or west roofs perform better in the UK than they would in, say, Spain.

This is also why the gap between a perfect south-facing system and a slightly off-south one is smaller than most people assume.

South-Facing Roofs: The Gold Standard

South-facing solar panels receive more daylight hours than any other orientation in the UK. The MCS irradiance data confirms that due south (0° azimuth) is optimal across all 25 UK zones analysed — there are no regional exceptions.

How Much More Does a South-Facing Roof Generate?

Here's how annual solar yield compares by direction, based on MCS irradiance data:

The key takeaway: deviations of up to 45° from south cost you less than 6% of annual output. That's not a reason to avoid solar — it's a reason to stop worrying about having a perfect south-facing roof.

East and West-Facing Roofs: Still Worth It

If your roof faces east or west, your solar panels will still generate a meaningful amount of electricity — typically 80–85% of what a south-facing system of the same size would produce.

There's a useful pattern here too. East-facing panels produce more electricity in the morning, while west-facing panels peak in the afternoon and evening. If you use more energy later in the day — as many households do — a west-facing array can actually align well with your consumption habits.

What Output Can You Expect From an East or West Roof?

Based on MCS irradiance data, a south-facing 4 kWp system in the South East might generate approximately 3,700–3,800 kWh per year. An east or west-facing system of the same size in the same location would typically generate around 3,000–3,200 kWh — enough to cover a significant portion of an average UK household's annual electricity use of around 2,700–3,100 kWh.

Should You Install Panels on Both Sides?

If your home has usable roof space on both an east and west face, a split array is often an excellent option. You'll generate electricity across a longer daily window than a purely south-facing array — from morning through to evening — which can reduce your reliance on the grid throughout the day.

Switch Together's MCS-accredited installers regularly design split arrays as part of the scheme survey process. It's worth discussing during your roof assessment.

North-Facing Roofs: What You Need to Know

A purely north-facing roof is the one orientation where we'd generally advise against installing solar panels. Because the sun never tracks through the northern sky in the UK, north-facing panels receive the least exposure — typically generating only 50–60% of what a south-facing system would.

The exception: If your home has roof space facing north-east or north-west, panels on those faces can still contribute usefully as part of a larger installation alongside south, east, or west-facing panels. The MCS data shows north-east and north-west orientations typically deliver around 65–70% of south-facing output.

If your only available roof space faces due north, a Switch Together surveyor will give you an honest view on whether solar makes sense for your home. 

What's the Best Angle for Solar Panels in the UK?

Direction is only half the story. The tilt angle of your panels — how steeply they're inclined — also affects how much sunlight they collect. MCS irradiance data identifies the optimal tilt by latitude across 25 UK locations.

Best Angle by UK Region

Source: MCS irradiance dataset, 25 UK zones

The further north you go, the steeper the optimal tilt. This compensates for the sun sitting lower in the sky at higher latitudes.

The good news: most UK pitched roofs already fall within the 30–40° range, which is very close to optimal for the vast majority of UK homes. Your roof's existing pitch is likely close to what an installer would choose anyway.

Does the Angle Need to Change with the Seasons?

Technically, yes. In summer, when the sun is higher in the sky, a flatter angle (~20°) captures more light. In winter, a steeper angle (~50°) is better. But adjusting panel angles seasonally isn't practical or cost-effective for rooftop systems.

In practice, the fixed pitch of your roof provides a good year-round compromise — and the difference between the "ideal" seasonal angle and your roof's fixed pitch is small compared to the overall system output.

Location Matters More Than Direction

Here's a fact that surprises most homeowners: where you live in the UK affects your solar output more than minor variations in direction or angle.

MCS irradiance data shows the following annual solar resource by location (best case, south-facing, optimal tilt):

Brighton panels generate approximately 53% more energy annually than those in Lerwick under the same ideal conditions. That's a far bigger difference than the few percentage points separating a south-facing roof from a south-west-facing one.

The implication: if you live in northern Scotland with a perfect south-facing roof, your system may generate less than a slightly imperfect roof in Sussex. Direction matters — but geography matters more.

The Real-World Breakdown 

The data above shows what's theoretically possible — but what do real UK homes look like in practice? Across Switch Together's completed solar installations, here's how roof orientation breaks down: 

More than half of the installations we complete are on roofs that aren't perfectly south-facing — south-east and south-west alone account for over a third. That matches exactly what the MCS output data predicts: a roof doesn't need to be perfect to be worth it.

What If My Roof Isn't Perfectly Positioned?

The majority of UK homes are more solar-suitable than homeowners assume. Here's how common challenges are handled:

Shading

Trees, chimneys, and neighbouring buildings can reduce output regardless of which direction your roof faces. Modern solar systems fitted with optimisers or micro-inverters can limit the impact — they allow each panel to perform independently, so shade on one panel doesn't drag down the rest of the system.

A Switch Together survey will identify shading issues before installation and design around them where possible.

Split Arrays

Panels don't all need to face the same direction. A split array — panels on two or more roof faces — is common and often results in a more balanced daily output profile. Your installer will model the best configuration for your roof.

Flat Roofs

A flat roof is actually an opportunity, not a limitation. Panels can be mounted on angled frames — typically at 30–40° facing south — regardless of which direction your building faces. The main consideration is structural load: ballasted mounting frames are heavier than standard rooftop systems, so a structural assessment is usually required.

For more on this, read our guide to solar panels on flat roofs.

How Switch Together Assesses Your Roof

Every Switch Together installation begins with a roof survey by an MCS-accredited installer. The surveyor assesses:

• Direction (azimuth) — which way your roof faces and how far it deviates from south
• Pitch — your roof's tilt angle and how it compares to the optimal for your location
• Shading — trees, chimneys, and other obstructions across the day and year
• Structural condition — whether your roof can support the system safely
• Roof material — tile, slate, or flat roof, and the appropriate mounting method

You'll receive a personalised recommendation, including an estimated annual output and projected savings, before committing to anything.

Because Switch Together operates on a group-buying model — bringing together multiple households across a council area — our accredited installers can offer prices that individual homeowners couldn't access alone. Find out if there's an active scheme in your area.

Frequently Asked Questions

Which direction should solar panels face in the UK?

Solar panels in the UK should ideally face due south. The sun tracks through the southern sky all year, so south-facing panels receive the most daylight hours. East and west-facing panels are also productive, generating around 80–85% of south-facing output. North-facing panels are generally not recommended, though north-east and north-west orientations can work as part of a larger system.

Does my roof need to face south for solar panels to work?

No. MCS irradiance data shows that panels up to 45° off south — covering south-east and south-west orientations — still produce around 94% of maximum output. East and west-facing roofs also generate a meaningful amount of electricity. A qualified installer will assess your specific roof and give you a realistic estimate of what to expect.

What is the ideal angle for solar panels in the UK?

The optimal tilt angle is typically 37–38° in southern England, rising to 39–43° in northern England, Scotland, and Northern Ireland. Most UK pitched roofs already fall within 30–40°, which is close to optimal. The exact ideal varies slightly by location — the further north you are, the steeper the angle that works best.

Is east or west better for solar panels?

Neither is clearly better — the output difference is small. East-facing panels generate more electricity in the mornings; west-facing panels peak in the afternoon and evening. If you have roof space on both sides, a split array (panels on both east and west faces) is often the best option, as it generates electricity across a longer daily window.

Can I get solar panels on a north-facing roof?

A purely north-facing roof is generally not suitable for solar panels in the UK — output would be around 50–60% of a south-facing system, which usually makes the investment hard to justify. However, panels facing north-east or north-west can still contribute productively as part of a wider system. A Switch Together surveyor can give you an honest assessment for your specific home.

How do I know if my roof is suitable for solar?

The most reliable way is a free survey from an MCS-accredited installer, who will assess direction, angle, shading, roof condition, and structural load. As part of a Switch Together scheme, this survey is included at no cost. You'll receive a personalised output estimate and cost breakdown before making any decision.

Key Takeaways

• Due south is the ideal direction for solar panels in the UK, but it's not a requirement.
• Panels up to 45° off south (south-east or south-west) produce around 94% of peak output.
• East and west-facing roofs are still viable, typically generating 80–85% of a south-facing system.
• The optimal tilt angle is 37–43°, depending on your latitude — most UK roofs are naturally close to this.
• Where you live affects output more than minor direction variations — Brighton generates ~53% more solar energy per year than Shetland.
• The best way to know what your roof can generate is a free survey from a qualified installer.

Not sure if your roof is suitable?
Register with Switch Together and our MCS-accredited installers will assess your roof as part of the process — at no cost to you.

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