Solar Panels on North-Facing Roofs: Is It Worth It?

Solar panels on a north-facing roof generate roughly 50–60% of the electricity produced by an equivalent south-facing installation. That is a meaningful reduction – but for many UK homeowners, it still represents a worthwhile investment. At current electricity prices of around 28p/kWh, a 4kW north-facing system generating 1,700–2,040 kWh per year saves approximately £420–£500 annually on energy bills, with additional SEG export income on top.

The standard advice – that solar panels need a south-facing roof – is outdated. It was accurate when electricity was cheap and solar panels were expensive. In 2026, with electricity at record high prices and panel costs down 60% over the past decade, the reduced yield from a north-facing installation still makes financial sense for most households – provided there is no additional shading issue and the system is correctly sized. The upfront cost of a 4kW north-facing system is the same £5,000–£8,100 as a south-facing one; only the output and payback period change.

This guide explains exactly what to expect from solar panels on a north-facing roof – output by orientation, a real-money cost-benefit calculation, and the specific situations where north-facing panels are not worth installing.

Output by Roof Orientation: What the Data Shows

Solar panel output depends directly on roof orientation and pitch. South-facing at 35–40° is optimal in the UK; north-facing produces 50–60% of this. East and west facings sit comfortably in between, making them viable alternatives for most homes.

The output figures below are based on MCS (Microgeneration Certification Scheme) irradiance data for the UK and assume a 4kW system with no shading losses. Actual output varies by location – a north-facing system in Cornwall generates more than one in Edinburgh, because the south-west receives significantly more annual irradiance than Scotland. That said, the relative penalty for north-facing orientation is consistent across the UK at approximately 40–50% below south-facing output.

The key insight from this data is that even at 50% of south-facing output, a north-facing 4kW system still generates enough electricity to produce a positive return within the system’s 25-year lifespan. The question is not whether north-facing panels generate electricity – they clearly do – but whether the reduced return justifies the full installation cost in your specific situation.

Is It Worth Installing Solar Panels on a North-Facing Roof?

For most UK homeowners with a north-facing roof and no south, east, or west alternative, solar panels are still worth installing. The reduced output is offset by high electricity prices, 0% VAT until March 2027, and the system’s 25-year lifespan.

The financial case is strongest when three conditions are met. First, you have no viable alternative – flat roof mounting as an alternative is worth considering if you have a flat section available, since it allows optimal angle positioning regardless of house orientation, but if your only available roof space faces north, it is the only option. Second, your electricity consumption is high – households using 4,000+ kWh per year self-consume more of their north-facing output, maximising the value of every kWh generated. Third, you have access to a time-of-use tariff such as Octopus Go or Agile, which lets you charge a battery cheaply overnight and supplement reduced solar generation during the day.

For context: a 14–19 year payback on a £6,500 average installation cost (mid-range 4kW) still represents a positive return, because the system continues generating electricity for 25 years. The total 25-year saving from a north-facing 4kW system is estimated at £8,000–£12,000 – less than the £16,500–£32,600 achievable from south-facing, but still substantially positive. The are solar panels worth it decision comes down to your specific circumstances.

Real Example: North-Facing 4kW System in Manchester

A 4kW system on a north-facing roof in Manchester, installed at £6,500, generates approximately 1,750 kWh per year. At a 60% self-consumption rate and 28p/kWh import rate, with SEG exports at 7p/kWh, annual financial benefit works out to approximately £440.

Let’s make this concrete with a real calculation for a 3-bedroom semi-detached property in Manchester. You can also use our calculator to estimate output for your roof based on your specific location, pitch, and tariff before getting installer quotes.

This is a conservative case – electricity prices historically trend upward, and a 10% annual increase in electricity prices (which has been the UK average for the past three years) would reduce the payback period to around 15 years without any other changes. Even at reduced north-facing output, the system still cuts your electricity bill meaningfully from day one, with annual savings of £420–£500 at current rates. Adding an energy storage battery to increase self-consumption from 60% to 80–90% would bring the payback down to 12–14 years even on a north-facing roof.

When North-Facing Solar Panels Are NOT Worth It

Two conditions make north-facing solar installation genuinely unviable: significant shading in addition to north facing, and a very small roof area that limits system size below 2kW usable capacity.

Shading is the critical variable. A north-facing roof without shading generates 50–60% of south-facing output – acceptable. A north-facing roof with shading from a nearby tree, chimney, or dormer window can reduce output to 30–40% of south-facing – a level where payback extends beyond 25 years and the investment no longer makes sense. MCS-certified installers should provide a shading analysis using software such as PVSol or Aurora Solar before you commit – always request this as part of the survey.

Other situations where we would advise against proceeding with north-facing panels:

• The roof pitch is very shallow (less than 15°) – low pitch combined with north facing reduces irradiance significantly and increases soiling risk
• You are in a conservation area and planning permission will add £1,000–£2,000 to the cost
• The roof requires structural reinforcement before installation
• You have a suitable south or east/west-facing alternative (outbuilding, garage, garden pergola, ground-mounted system) that you have not yet explored

Alternatives to North-Facing Roof Panels

If your north-facing roof makes solar unviable, three alternatives are worth exploring: an east/west split system on both sides of a pitched roof, ground-mounted panels in a south-facing garden, or solar tiles that integrate more discreetly into the roof surface.

For a standard pitched roof, the most underused option is an east/west split array. Rather than mounting all panels on the north-facing slope, panels are split equally across the east and west slopes. An east/west system generates 75–80% of the south-facing optimum – significantly more than pure north – and has the additional advantage of generating electricity across a wider daily window (morning peaks from east, afternoon peaks from west), which increases self-consumption without requiring battery storage.

Ground-mounted panels are viable if you have a south-facing garden of 20m² or more. They cost approximately 10–20% more than roof-mounted systems due to additional groundwork, but can be positioned at the ideal 35–40° angle and face due south, maximising output. Check permitted development rules – ground-mounted panels over 9m² typically require planning permission. See our grants guide for any available local authority support.

Hive now offers solar installations – see our Hive Solar Panels review for pricing and verdict.

How to Get the Most from North-Facing Solar Panels

If you proceed with north-facing solar, three steps maximise your return: install microinverters or power optimisers rather than a string inverter, add a solar diverter for hot water, and switch to a time-of-use tariff.

Standard string inverters perform poorly when panels operate at different output levels – the lowest-performing panel drags down the entire array. On a north-facing roof where panels may receive uneven irradiance across the day, microinverters or DC power optimisers (such as those from Enphase or SolarEdge) maximise the output of each panel independently, and choosing high-efficiency monocrystalline panels compounds this advantage by squeezing the maximum possible generation from each square metre of limited north-facing roof space. The additional cost of £300–£600 for optimisers is typically recovered in improved generation within 3–5 years.

The solar panel output from a north-facing array peaks around solar noon and tails off quickly. A solar immersion diverter (£300–£500 fitted) captures surplus electricity at peak generation times to heat your hot water cylinder, increasing self-consumption and reducing gas or electric boiler use – particularly valuable in summer months when north-facing generation is at its best and hot water demand is lower.

Laura Bennet

Home Energy & Sustainability Editor

Laura leads coverage on home energy, heating, and sustainable living. With over 12 years in the UK energy sector, she writes about boilers, solar panels, insulation, and eco-friendly upgrades that reduce household costs.

Reviewed by

Tom Reynolds

Business Energy Specialist