Are Solar Panels Worth It in the UK in 2026?
Author: Steve Fairless
Originally Published: 20th April 2024 · Updated: 28th August 2026
For many suitable UK homes, yes — solar panels remain worth considering in 2026. But the strongest current evidence supports a more measured answer than some older solar marketing: Energy Saving Trust now uses an average 4.5 kWp system cost of about £7,600 and example payback periods of roughly 9-12 years across Great Britain when export payments are included.
This page was first published in April 2024. In updating it, we have deliberately removed broad assumptions such as “5-9 year payback for most homes” and “60-85% energy independence” unless the specific system model supports them. Solar remains compelling, but credible 2026 advice should distinguish national benchmarks from a property-specific forecast.
Updated: 28th August 2026 using the latest Energy Saving Trust solar guide, Ofgem price-cap and SEG information, HMRC VAT rules, MCS MIS 3002 Issue 6.0 and DESNZ deployment data.
2026 UK Solar in Numbers
- Typical system benchmark: about 4.5 kWp and £7,600 according to current Energy Saving Trust guidance.
- Example payback: 9 years in London, 10-11 years in Manchester, 9-10 years in Aberystwyth and 11-12 years in Stirling, depending on occupancy pattern.
- Current capped electricity price: 26.11p/kWh average for Direct Debit default-tariff customers from July to September 2026.
- Next announced cap: 26.32p/kWh average electricity from 1 October to 31 December 2026.
- 0% VAT: qualifying installed solar remains zero-rated until 31 March 2027.
- Market adoption: nearly 172,000 UK solar installations were fitted from the start of 2026 to 27 August.
What Has Changed Since This Article Was First Published in 2024?
The fundamental technology is the same — photovoltaic modules convert light into electricity — but the economics and evidence base have changed.
| Question | Older simplified claim | Our 2026 approach |
|---|---|---|
| Payback | Often presented as 5-9 years | Use current Energy Saving Trust benchmark examples of roughly 9-12 years, then model the actual property |
| Battery value | Battery assumed to increase savings | Model battery as a separate investment based on surplus, evening demand and tariff |
| Export income | Generic SEG rate | Check the actual supplier tariff and conditions; Ofgem only requires a positive eligible tariff |
| Performance | Generic annual output | Use MCS-compliant generation and self-consumption estimation for the proposed design |
| VAT | 0% solar, battery treatment less straightforward | Qualifying installed solar and electrical storage batteries are currently zero-rated until 31 March 2027 |
The Current Cost Benchmark: Around £7,600 for 4.5 kWp
Energy Saving Trust's current England solar guide uses an average domestic system of around 4.5 kWp and a cost of about £7,600. It says a system of this size typically covers around 20-30 m² of roof and often uses around 12 panels.
This is a national consumer benchmark, not a quotation from us. Actual project pricing depends on scaffolding, roof type, electrical work, equipment specification, access, battery inclusion and whether roof work is needed.
If you are comparing a real installation, our solar PV for home service starts with the building and energy profile rather than a fixed package price.
Current Payback Data Is More Useful Than an Advertised Headline
Energy Saving Trust's July 2026 payback table, including export payments, gives the following examples:
| Location | Home all day | Home half the day | Out all day |
|---|---|---|---|
| London | 9 years | 9 years | 9 years |
| Manchester | 10 years | 10 years | 11 years |
| Aberystwyth | 9 years | 9 years | 10 years |
| Stirling | 11 years | 11 years | 12 years |
Those figures are more cautious than many sales claims and that is useful. A robust proposal should be able to explain why the property is expected to perform better or worse than a national benchmark.
Why Electricity Price Still Matters
Every solar kWh that replaces imported electricity has a value related to the import tariff. Ofgem's current July-September 2026 cap gives an average electricity unit rate of 26.11p/kWh for Direct Debit default-tariff customers in England, Scotland and Wales.
Ofgem has already announced the next period: from 1 October to 31 December 2026 the average electricity unit rate will be 26.32p/kWh, with a 54.83p daily standing charge. Actual regional rates vary.
Solar does not remove the standing charge on a normal grid connection, so we do not include standing-charge savings in solar ROI unless a specific tariff arrangement genuinely changes them.
Self-Consumption Usually Matters More Than Panel Wattage
A roof can have an excellent annual yield and still deliver a weaker financial result if most generation is exported at a low tariff and the home imports heavily at expensive times.
That is why we focus on:
- annual generation;
- when that generation occurs;
- when the household uses electricity;
- what percentage is used directly;
- what percentage is stored;
- what percentage is exported;
- the import and export tariff.
SEG Helps — But Export Rates Are Not Guaranteed for Decades
The Smart Export Guarantee requires eligible electricity suppliers to offer tariffs to qualifying small-scale generators in Great Britain. Ofgem's current 2026-27 supplier list includes major mandatory licensees such as British Gas, E.ON Next, EDF, Octopus, OVO and ScottishPower.
Suppliers choose their tariff rate and contract terms, provided the eligible SEG rate is above zero. This is why a lifetime solar model should not assume today's best export tariff remains unchanged for 20 or 25 years.
Illustrative Value of 1,000 kWh
At 26.11p/kWh, using 1,000 kWh of solar onsite instead of importing it is worth about £261 before any other effects. If the same 1,000 kWh were exported at an illustrative 12p/kWh, it would earn about £120. That gap is why load matching and storage can matter. The export figure is illustrative; actual supplier tariffs vary.
Does Battery Storage Make Solar More Worthwhile?
Sometimes. Energy Saving Trust currently says battery storage typically costs around £5,000-£8,000. A battery can increase the amount of solar used onsite and can work with time-of-use tariffs, but it also adds capital cost and conversion losses.
We therefore model storage separately. A household that already uses most of its solar during the day may not need a large battery. A household with high evening demand may benefit much more.
See our solar battery storage page for the way we integrate storage into a complete home-energy design.
0% VAT Remains a Real 2026 Advantage
Current HMRC guidance keeps qualifying installations of solar panels and electrical storage batteries at 0% VAT until 31 March 2027. The temporary rate materially reduces the upfront cost compared with a standard VAT treatment.
We would not, however, install a poorly designed system simply to “beat the VAT deadline”. The correct roof, inverter, battery and electrical design matter far more over the system life.
Solar Adoption Is Still Accelerating
DESNZ reported on 27 August 2026 that nearly 172,000 solar installations had been fitted across the UK since the start of 2026. More than seven in ten installations during July were rooftop systems.
That tells us solar is now mainstream. It does not prove suitability for an individual property, but it shows that the technology is no longer a niche experiment.
MCS Performance Estimates Matter More Than Sales Claims
The current MCS Solar PV Installation Standard, MIS 3002 Issue 6.0, requires a prescribed annual performance estimate and self-consumption assessment in the pre-sale information. The methodology considers system size, orientation, inclination, location and shading.
A good quote should therefore show where its annual kWh figure came from. If two installers quote the same roof and produce dramatically different forecasts, the assumptions should be challenged.
What About North-, East- and West-Facing Roofs?
South-facing remains the standard benchmark for maximum annual output, but east- and west-facing arrays can still be viable. Energy Saving Trust says an east- or west-facing roof tends to generate around 15-20% less energy than a directly south-facing roof.
That annual reduction is not the whole story. East-west generation can be spread more across morning and afternoon, which may fit household demand well.
Will Solar Work on Cloudy Days?
Yes. Solar panels generate from daylight and continue producing under cloud, although output falls with lower irradiance. UK yield calculations already account for the local solar resource, which is why installers should use location-specific performance methods rather than Mediterranean assumptions.
What Is a Sensible 2026 ROI Calculation?
That is a starting point, not a full investment model. A more complete calculation should consider:
- panel degradation;
- inverter replacement/maintenance;
- battery replacement where applicable;
- finance interest if the system is borrowed;
- future tariff uncertainty;
- export tariff uncertainty;
- roof work that would have been needed anyway;
- how household demand may change.
When Solar Is Usually a Stronger Investment
Stronger Case
- Good unshaded roof area
- Meaningful daytime/evening electricity demand
- Long ownership horizon
- Competitive installation price
- Credible MCS generation estimate
- Useful export tariff
Weaker Case
- Major shading that cannot be designed around
- Roof replacement due soon
- Very low electricity demand
- Short planned ownership with no value placed on the asset
- High-cost finance
- Oversized battery with little opportunity to cycle
Our 2026 Verdict
Solar panels are still worth it for many UK homes, but the right answer is not “yes for everyone” and it is not based on an unrealistic five-year payback headline. Current independent benchmarks point to a credible long-term investment where roof, price and usage are suitable.
The biggest improvement since 2024 is not simply a higher-wattage panel. It is better modelling: current MCS rules, smarter tariffs, battery options and more transparent consumer data make it easier to design a system around how a household actually uses electricity.
For a North East property, start with Sustainable Energy Engineering. If you want a property-specific output and savings assessment, request a solar survey and quotation.
