Is Solar Worth It in the UK in 2026?
Solar is worth it when the system produces enough useful electricity to justify the upfront cost within a timeframe you are comfortable with. In 2026, the case is strongest when your roof is suitable, your quote is competitive and you can use or export the generated electricity well.
Assumptions reviewed 2 July 2026: the calculator default import rate is aligned to Ofgem's 1 July to 30 September 2026 average electricity unit rate for Direct Debit customers, rounded to 26.1p/kWh from the 26.11p/kWh published figure. Current tariff choice is still a live part of the solar decision.
Short answer
Solar is more likely to be worth it if the roof is suitable, the quote is competitive, the annual generation estimate is believable and you can use or export the electricity at a good rate. It is less compelling if the quote relies on optimistic generation or an expensive battery that adds little extra benefit.
A better way to judge it
Treat the decision like a small investment in your home, not a yes or no lifestyle question. First calculate the solar-only result. Then test the same quote with a lower generation estimate, a lower export tariff and a realistic daytime usage pattern.
Energy Saving Trust's current examples show payback can vary by location and household pattern, with export payments included in the calculation. That is the right lesson to take from national examples: they are useful context, but your roof and tariff decide the result.
A quick worth-it checklist
- Roof: enough usable space, limited shading, suitable condition and a sensible orientation.
- Generation: annual kWh estimate is realistic, not inflated to make the quote look better.
- Self-consumption: your household can use meaningful electricity during daylight hours, or you have a credible battery case.
- Export: you can access an export tariff and have the metering needed for payments.
- Quote: the price, equipment and warranties are strong compared with like-for-like alternatives.
What makes solar more compelling?
| Factor | Why it helps |
|---|---|
| Higher import unit rate | Every self-used kWh avoids buying more expensive electricity. |
| Higher self-consumption | More generation is valued at the import rate rather than exported. |
| Good roof and low shading | Higher annual generation improves savings and export income. |
| Competitive quote | Lower upfront cost shortens simple payback. |
When to be cautious
- The quote relies on unusually high generation assumptions.
- Most electricity use happens at night and the battery quote is expensive.
- The roof needs repair or has major shading that has not been modelled.
- You cannot access an export tariff or suitable metering.
- The installer cannot clearly explain MCS, DNO and handover paperwork.
Best next step
Run a solar-only estimate first. Then test a battery case separately. If a small change in export rate, self-consumption or generation flips the decision, treat the quote as sensitive and gather better data before committing.
Start here: solar savings calculator · solar savings guide · UK solar costs · solar payback period · solar ROI guide · when solar may not be worth it
Sources checked
Current assumptions reviewed 2 July 2026
- Ofgem energy price cap unit ratesDefault uses the Direct Debit electricity unit rate for 1 July to 30 September 2026: 26.11p/kWh, including VAT.
- Energy Saving Trust solar panel guideAverage domestic solar PV system: around 4.5kWp and about £6,100, with roof direction, shade and access changing the final quote.
- Energy Saving Trust battery storage guideBattery storage costs vary by size and type. Energy Saving Trust says a 5kWh battery system is around £4,600, with wider costs ranging from £1,500 to £10,000.
- Ofgem Smart Export Guarantee guidanceSEG export tariffs are set by suppliers, must be above zero, and require eligible metered exports.
- European Commission PVGISPVGIS provides location-specific solar radiation and photovoltaic performance estimates.