Solar panels on a north-facing roof generate significantly less electricity than on a south-facing one — but that doesn't automatically mean they're a waste of money. Whether it's worth it depends on how much roof you have, what else you can put panels on, and what you're trying to achieve.
How much less do north-facing solar panels generate in the UK?
This is the number that matters most, and the honest answer is: quite a lot less — but perhaps not as much as you'd expect.
In the UK, the sun is always slightly to the south, regardless of the time of year. That's why south-facing is always the benchmark. Data from the Energy Saving Trust and PVGIS — the dataset used by MCS installers — shows that a north-facing roof typically delivers only 50–60% of the output of a south-facing one.
Real-world evidence backs that up. A study by Yorkshire installer Oval Renewables installed two identical 12-panel arrays (375W each) on the same rooftop near Newcastle — one true south, one true north. Over a full year (April 2023–April 2024), the south array generated 4,556 kWh and the north array generated 2,457 kWh — meaning the north-facing panels achieved 54% of the south-facing output.
To put that in pounds-and-pence terms: if a south-facing 4 kWp system in the Midlands might generate around 3,600 kWh a year, the same system facing due north might generate roughly 1,900–2,200 kWh. At the Ofgem average capped electricity rate of 26.11p/kWh (July–September 2026), that difference is roughly £360–£440 a year in lost generation value. That's a big gap to overcome.
So can you get solar panels on a north-facing roof — and should you?
You can, technically. There's no law or MCS rule that prevents it. But whether you should is a different question, and the honest answer is: it depends on your situation.
Here's what makes or breaks the case for a north-facing system:
- Is it your only available roof space? If you have a detached or semi-detached house with multiple roof faces, the north face should be the last one you use — not the first. Most installers will explore south, east, and west before touching north.
- What's the pitch? A very shallow north-facing pitch (say, under 15°) is worse than a steeper one. At very low angles, the panels barely tilt away from the sky at all. A steeper pitch is marginally better, but north is north.
- Are you adding panels to an existing south-facing system? This is the one scenario where north-facing panels genuinely make sense. If you only have space on your rooftop for north-facing solar panels, it's normally not worth it — but north-east or north-west rooftops can be suitable as part of a larger installation.
- Do you have unusually high daytime electricity use? A north-facing system still generates power during the day — just less of it. If you work from home and use a lot of electricity in daylight hours, self-consumption rates will be higher, which makes the economics slightly more favourable.
Shading is often more important than perfect alignment — a small amount of shade can reduce output by far more than a suboptimal angle. If your south-facing roof is heavily shaded by a chimney or neighbouring building, a clear north-facing slope might sometimes outperform a shaded south one. See our guide on solar panels and shade for more on this.
The worked example: north-facing vs south-facing on a 3-bed semi
Let's be clear: this is a worked example, not a guarantee. Real figures will depend on your home, location, usage habits, and the quotes you receive.
Take a typical 3-bed semi in the Midlands. A standard 4 kWp solar PV system in the UK typically costs £5,500 to £8,000 fully installed in 2026. That's at 0% VAT, which applies to residential solar until at least March 2027.
South-facing 4 kWp (worked example): Roughly 3,400–3,800 kWh/year generated. If you self-consume around 40%, you save on roughly 1,360–1,520 kWh at 26p/kWh — around £354–£395 — plus export income via the Smart Export Guarantee on the rest.
North-facing 4 kWp (same example): At 54% of south-facing output, expect roughly 1,800–2,000 kWh/year. At 40% self-consumption, you'd save on around 720–800 kWh — approximately £187–£208/year before SEG export income.
The gap is material. On a north-facing system, payback periods stretch considerably — possibly beyond 15 years on panels alone. That's the honest picture. See our guide to solar panel payback time in 2026 for the full methodology.
What about the Smart Export Guarantee — does it help?
It helps a little, but don't expect it to rescue a marginal north-facing project. The Smart Export Guarantee (SEG) pays you for excess solar electricity exported to the grid. Best fixed rates in 2026 include Octopus at 12p/kWh and OVO at 12p/kWh. To qualify for the SEG, your system must be installed by an MCS-certified installer and you need a smart meter.
The problem with a north-facing system is that you're generating less overall, which means less to export. You buy electricity back at roughly 24.67p per kWh — that single fact means a unit you use yourself is worth far more than a unit you export at a flat rate. With less generation, both your self-consumption savings and your export income are proportionally reduced.
For the full picture on getting the best export rate, see our guide to the best Smart Export Guarantee rates in 2026.
Better alternatives to a pure north-facing system
Before committing to north-facing panels as your only option, consider these alternatives:
- East-west split: If your home has both an east and a west slope, this is almost always a better option than north. Solar panels are now advanced enough that exclusively east-west arrays work extremely well — east-facing panels produce more electricity in the morning, while west-facing arrays generate more in the afternoon and evening. Our full guide covers solar panels on an east-west roof.
- Flat roof with tilted frames: If you have a flat or near-flat roof, panels can be mounted on angled frames and oriented south. This avoids the north-facing penalty entirely. See our guide on solar panels on a flat roof.
- Smaller south/east/west system: It's almost always better to install fewer panels on a well-oriented roof than more panels facing north. Quality of generation beats quantity here.
- Battery storage: If you do proceed with a north-facing system, maximising self-consumption becomes even more important. A battery helps you use more of what you generate rather than exporting it at a lower rate. That said, batteries add cost — typically £3,000–£6,500 — and extend your payback period further.
When a north-facing roof is genuinely part of the answer
There are real situations where including a north-facing slope makes sense:
Adding to an existing south-facing system. If you've already maxed out your south, east, and west roof space and want more capacity — for an EV charger, a heat pump, or simply to cut your bill further — north-facing panels as an addition can make economic sense. The marginal cost of extra panels once the scaffolding and inverter are already in place is lower, which improves the return on the north-facing portion.
Large, unshaded roof with a good pitch. If you have a large north-facing slope, no shading issues, and a healthy electricity bill, the volume of generation can still produce worthwhile savings. It won't match a south-facing system, but it may still make more sense than doing nothing — particularly if no other roof face is available.
The key test: get the numbers modelled properly. Any reputable MCS-certified installer should be able to run your specific roof through yield-modelling software (using MCS irradiance data) and show you projected annual generation, payback time, and savings range for your exact postcode and pitch. If they can't show you that, treat it as a red flag. Our guide on solar quote red flags covers exactly what to look for.
The honest summary
A north-facing roof on its own is rarely the right first choice for solar in the UK. The output penalty is real — roughly 40–50% less generation than south-facing — and that makes the payback period significantly longer. For most homeowners with only a north-facing roof and no south, east, or west option, the numbers are hard to make work.
But this isn't a blanket no. If north is part of a larger system, if you're expanding an existing installation, or if your circumstances are unusual (large unshaded roof, high daytime usage, long-term planning horizon), it can still be worth exploring. The crucial step is getting a proper yield assessment from a qualified, independent installer — not a sales pitch.
If you'd like free, no-obligation quotes from vetted MCS-certified installers who will assess your specific roof (including any north-facing slopes) and give you honest numbers, use our free quote form. There's no pressure and no obligation — just a clear picture of what's possible for your home.
Frequently asked questions
Do solar panels work on a north-facing roof in the UK?
Yes, they generate electricity, but significantly less than a south-facing system — typically around 50–60% of south-facing output, based on MCS irradiance data and real-world studies. Whether the reduced generation still makes financial sense depends on your roof size, pitch, shading, and electricity usage.
How much less do north-facing solar panels generate compared to south-facing?
Real-world UK data from a side-by-side study near Newcastle showed north-facing panels generating around 54% of what the equivalent south-facing array produced over a full year. Energy Saving Trust and PVGIS data puts the typical range at 50–60% of south-facing output, though the exact figure depends on your pitch and location.
Can I get the Smart Export Guarantee on a north-facing system?
Yes — SEG eligibility depends on your installer being MCS-certified and you having a smart meter, not on which way your roof faces. However, because a north-facing system generates less overall, both your self-consumption savings and your export income will be lower than they would be on a south-facing system.
Is a north-facing roof better than no solar at all?
It depends. If you have no south, east, or west roof space at all, a north-facing system may still generate enough to be worthwhile — particularly if your electricity bills are high and you use a lot of power during daylight hours. Get an MCS installer to model the specific yield for your postcode and roof pitch before deciding.
What if my roof faces north-east or north-west — is that better?
Yes, meaningfully so. North-east and north-west orientations capture more direct sunlight across the day than due north, and MCS guidance notes they can be suitable as part of a larger installation. They won't match south, east, or west on their own, but the penalty is less severe than pure north.