Solar panels UK: are they worth it in 2026?
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Quick answer: Solar panels can pay back in roughly 8–14 years for a typical UK home with good roof orientation, depending on install cost, self-consumption, and whether you sell surplus via SEG. They work best alongside a battery if you are out all day, or if you shift usage to daylight hours.
Rising electricity prices and the Smart Export Guarantee (SEG) revived home solar economics. Panels are not right for every roof — shading, orientation, and whether you can use power while the sun shines drive the maths.
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Read the full bills & utilities guide →Primary source: www.gov.uk/guidance/buy-and-install-solar-panels
Payback calculation
Estimate annual generation (installer will model this), multiply self-used kWh by your import rate, add SEG income on exports, and subtract from install cost. MCS-certified installers provide standard performance estimates.
Batteries add cost but increase self-consumption — worthwhile if you are out during peak solar hours.
Choosing an installer
Use MCS-certified installers for SEG eligibility and consumer protection schemes. Get three quotes; compare warranty lengths on panels and inverters, not just headline price.
Common questions
Do solar panels need planning permission?
Most roof-mounted domestic systems are permitted development in England, Wales and Scotland subject to limits — listed buildings and conservation areas need extra checks.
Will solar panels affect my mortgage or home insurance?
Tell your buildings insurer — cover usually continues with notification. Some lenders offer green further-advance products to fund installs.