Will a north facing roof pay you back?
Got a north-facing roof and wondering if solar panels can still generate enough electricity to pay you back and power your home? Older articles will say no, but prices have come down a lot, and you can still generate 50-75% of the power of a south-facing roof, which makes it viable in 2026.
Let’s see what your payback impact will look like.
- North-facing panels produce 50 to 70% of a south-facing array. Two real-world UK tests came in at 54% and 58%, higher than most people expect.
- Roof pitch is the hidden variable. A shallow pitch (15 to 20 degrees) narrows the gap; a steep 45-degree north roof is the worst case at 40 to 45% of south.
- North and north-west arrays give a flatter, later daily curve. That lifts the share of power you use yourself, and each self-used unit is worth more than an exported one.
- Standalone payback runs long: 13 to 20 years. Adding a north slope to a larger system is the stronger case, often 12 to 15 years.
- Check the alternatives first. A south-facing garage roof, ground mount, flat-roof frames or an east-west split will usually beat a due-north array.
The short answer
Yes, they work on a north facing roof with one catch: quantity. That makes it a numbers question, and the numbers are far kinder in 2026 than they were a decade ago. Electricity has climbed from around 12p per kWh in 2010 to roughly 26p today, while panel prices have more than halved. A north roof that made no financial sense at 2010 prices can pay back inside its warranty period now. Whether it does for you comes down to three things: how far off due north your roof points, how steep it is, and how much of the power you can use at home rather than export.
How much power you actually lose
As a working rule, expect an annual yield of 50 to 70% of an identical south-facing roof. North-east and north-west orientations sit at the top of that band; true north at a steep angle sits at the bottom.
The most useful evidence is a controlled test. One UK installer ran two 12-panel arrays of 375W modules on the same building near Newcastle, one facing true south and one facing true north, both free of shading. Over a full year the south array made 4,556 kWh and the north array made 2,457 kWh. That’s 54% of the south output, and the north side still contributed 35% of the building’s total generation. A separate homeowner case study recorded south-east panels averaging 380 kWh each against north-west panels at 220 kWh each, roughly 58%.
In per-panel terms, a south-facing array in the UK typically yields around 900 to 1,000 kWh for every kWp installed; a north-facing array of the same size returns roughly 450 to 650. For a standard 4kWp system that’s about 3,600 kWh against 1,800 to 2,500 kWh a year.
| Orientation | Output vs south | Typical annual yield |
|---|---|---|
| Due south | 100% | ~3,600 kWh |
| East or west | 80-85% | ~2,900-3,100 kWh |
| North-east / north-west | 60-70% | ~2,200-2,500 kWh |
| Due north, shallow pitch | 55-60% | ~2,000-2,150 kWh |
| Due north, steep pitch | 40-45% | ~1,450-1,600 kWh |
Why roof pitch changes everything
Orientation gets all the attention, but on a north roof the pitch does more of the damage. The steeper a north-facing roof is, the more directly it points away from the sun’s path, and the more the ridge of the house shades the slope through the middle of the day.
A steep 45-degree north pitch is close to the worst case, dropping output toward 40 to 45% of south. A shallow pitch of 15 to 20 degrees tells a different story: the panels face much closer to the open sky, they catch more of the high summer sun, and the performance gap narrows sharply. A near-flat north roof can perform almost like an east-west array. This is why the best angle for solar panels is not a single number but a trade-off that shifts with the direction your roof faces.
A shallow north roof and a steep north roof can differ by 15 percentage points of annual yield, often the difference between a sound investment and one that never quite pays back.
Germany runs one of the largest solar markets on earth despite sitting at a similar latitude to much of the UK. Latitude and weather set the ceiling on output; they rarely make solar pointless.
The self-consumption angle most guides skip
Total generation is only half the value story. What matters to your bill is how many units you use in the house versus how many you export. A unit you use yourself saves you the full import price, around 26p. A unit you export earns the Smart Export Guarantee rate, around 12 to 13p on the better tariffs. Self-used power is worth roughly twice as much.
Here’s where north and north-west roofs earn back some ground. A south array peaks around midday, when many homes are empty and demand is low, so a large slice of that peak gets exported cheaply. North and especially north-west panels produce a flatter curve that holds up later into the afternoon and early evening, closer to when people are home cooking, washing and charging things.
The effect is a higher self-consumption rate. Modelling suggests a south array self-uses around 37% of its output while a north-facing array self-uses closer to 52%, so every north-facing kWh is worth slightly more per unit. It doesn’t rescue the headline economics, since a north roof still generates far fewer total units, but it softens the gap more than the raw output figures imply. Shifting more of your electricity use into daylight hours pushes that advantage further.
What it costs and how long it takes to pay back
A north-facing install costs the same to fit as any other: scaffolding, labour, inverter and paperwork don’t care which way the roof points. What changes is the return, because you’re generating fewer units against the same upfront cost. The cost of solar panels for a typical 4kWp system runs around £5,500 to £7,500 fully installed.
A standalone north 4kWp system generating about 2,100 kWh, self-using half of it, is worth in the region of £410 a year in savings and export income. That points to a payback of around 16 years, against roughly 10 years for the same system facing south. The panels will still be generating at 25 years, so a north array remains a lifetime money-maker, just a slower one.
The strongest case for a north slope is adding it to a larger system you’re already installing. The scaffolding, inverter headroom and labour are already paid for, so the extra north panels cost far less per watt than a standalone job. That marginal maths often brings payback down to 12 to 15 years even on a modest north roof.
When a north roof is worth it, and when it isn’t
There’s no single answer, so weigh it against your own situation rather than a blanket rule.
- The roof is a shallow north-west, not a steep due north
- You’re adding it to a larger install already going ahead
- You’re home during the day and can self-use the output
- You have a large north roof and want to maximise total generation
- Your south and east/west roof space is already full
- Steep due-north pitch with output near 40 to 45%
- A small system of only 6 to 8 panels, stretching payback out
- Any meaningful shading on top of the orientation penalty
- You’re in the far north of England or Scotland
- You have unused south or east/west roof space elsewhere
In northern England and Scotland (around 55 to 57 degrees north), lower irradiance and a lower midsummer sun mean a north-facing roof underperforms the national figures by a further 10 to 20%. A standalone north array this far north rarely stacks up on its own.
Better alternatives worth checking first
Before committing to a due-north array, rule out the options that usually deliver more for the same money.
Even a small 3kWp array on a south-facing garage will often out-generate a larger north array on the house. Always check the outbuildings first.
If you have a sunny garden, a ground-mounted array can be angled and oriented however you like. Small ground mounts (up to 9 square metres) are permitted development; larger arrays need planning permission.
A flat roof section, dormer or extension lets you tilt panels south on angled frames regardless of the main roof. See our flat-roof solar guide for the mounting options.
If your roof runs east-west rather than north-south, splitting panels across both slopes gives you 80 to 85% of south output with a helpfully wide daily generation window.
On a marginal north roof, pairing a smaller array with a home battery lets you store cheap off-peak grid power and any daytime surplus, often improving the overall economics.
Getting the most from a north-facing array
If a north roof is your best or only option, a few design choices make a measurable difference to the return.
- Fit power optimisers or microinverters. On a north slope, uneven light and partial shade hit harder. Microinverters and power optimisers let each panel work independently so one weak module doesn’t drag the string down.
- Minimise shading before you start. Orientation and shade compound each other. Even 10% shading can cut output by up to 50%, so understanding how shade affects output matters more on a north roof than a south one.
- Size the array generously. A larger north array spreads the fixed install costs across more panels, improving the cost per watt and shortening payback.
- Use high-efficiency panels. When roof output is already constrained, squeezing more watts from each square metre helps close the gap.
- Get three MCS-certified quotes. Ask each installer for a bespoke yield estimate for your specific pitch and orientation, not a generic figure, and don’t pay more than 25% as a deposit.
Frequently asked questions
Do north-facing solar panels actually generate electricity?
Yes. Panels run on daylight, not direct sun, so a north roof generates every day the sun is up, just less of it.
Does a north-facing roof affect Smart Export Guarantee payments?
No. SEG tariffs pay per exported kWh regardless of orientation. You’ll export fewer units from a north roof, but each one earns the same rate.
Do I need planning permission for solar on a north-facing roof?
For most homes, roof-mounted solar is permitted development, so no planning permission is needed. Listed buildings need consent, and in a conservation area only walls or balconies fronting a road are excluded, though some councils remove those rights, in which case a rear or side slope is usually allowed.
A north roof is a numbers question, not a no
Rule out the alternatives, then get a modelled yield figure for your exact roof. If the payback lands inside 15 years, a north array is a sound long-term investment. If it stretches past 20, your money will work harder elsewhere.
METHODOLOGY: Output percentages drawn from published UK controlled comparisons and MCS irradiance data. Cost figures reflect MCS-certified installer pricing for a standalone 4kWp system, October 2026. Yield and payback modelled at an import price of 26.32p/kWh (Ofgem cap, October to December 2026, with VAT on domestic electricity at 0% until 31 March 2027), an export rate of 12p/kWh, and self-consumption of ~52% for north arrays.
DISCLAIMER: All prices and yields are indicative. Actual figures vary by region, roof pitch, shading and installer. This guide is not financial advice. The Smart Export Guarantee is administered by Ofgem.
UPDATED: 21 October 2026. Reflects current 0% VAT window through 31 March 2027.
