Are Solar Panels Worth It in the UK in 2026?
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Payback tells you when solar stops costing you money. It does not tell you whether it is worth it. This page answers the second question for UK homeowners in 2026: what you actually gain across the system's whole life, after the 0% VAT relief, with energy prices rising and panels slowly ageing. If you specifically want the break-even year, use the solar panel payback calculator instead — this one is about the total return.
Just want the break-even year? Use the solar panel payback calculator instead — it covers both UK and US incentives.
Note: An estimate for general guidance, not financial advice. Your real return depends on roof orientation and shading, how much generation you use at home rather than export, inverter replacement (typically once, around year 12), and your eligibility for the VAT relief.
How this calculator works
This calculator adds up every year of savings across the lifetime you enter, then subtracts what the system cost you after the VAT relief. Each year's saving is grown by the energy price increase and reduced by panel degradation, so later years are worth more than earlier ones in cash terms even as output slowly falls. The headline figure is your net gain: everything the system returns beyond what you paid. The breakdown also shows the break-even year, so you can see both halves of the picture — when you stop losing and how much you ultimately gain.
Worked example
An £8,000 quote with 0% VAT relief costs about £6,400. Saving £1,200 in year one, with 4% energy inflation and 0.5% annual degradation, the system breaks even at roughly year five. Keep it for 25 years and total savings come to about £46,600, leaving a net gain near £40,200 — several times what the system cost. Move house at year eight and the picture is very different: around £10,900 of savings against a £6,400 cost, so a gain of roughly £4,500 plus whatever the panels add to the sale price.
Frequently asked questions
Are solar panels worth it in the UK in 2026?
For most homeowners with a reasonably unshaded south-, east- or west-facing roof who plan to stay put, yes. The 0% VAT relief runs until March 2027, energy prices remain high, and a system that breaks even around year six then delivers close to two decades of largely free electricity. It is a weaker case if you expect to move within a few years, your roof is heavily shaded, or you are away from home during daylight and export most of what you generate.
How long do solar panels last?
Panels themselves typically carry 25-year performance warranties and often keep working beyond that at reduced output. The inverter is the part most likely to need replacing, usually once at around year 10 to 15, costing roughly £800 to £1,500 — worth factoring into a long-horizon decision.
What happens to the VAT relief after March 2027?
The 0% rate on qualifying installations is scheduled to rise to 5% from April 2027. That is still well below the standard 20% rate, so solar remains cheaper than it was before the relief existed — but installing before the deadline saves you that extra 5%. The second option above models the post-2027 position.
Do solar panels add value to my home?
Generally yes, though estimates vary widely and depend on system age, ownership (owned outright is far better than leased) and local buyer appetite. Treat any uplift as a bonus on top of the energy savings rather than the core reason to install.
Should I get a battery as well?
A battery raises upfront cost substantially and typically lengthens payback, because it shifts when you use your own generation rather than generating more. It makes the strongest case if you are out during the day and would otherwise export most of your output, or if you want resilience during outages. Model it by entering the combined cost and a realistically higher annual saving.
What if I move house before payback?
You keep whatever you saved up to that point, and owned panels usually add something to the sale price. Reduce the lifetime figure above to the number of years you realistically expect to stay — that shows the honest return on your actual horizon rather than a 25-year best case.