Is solar worth it in the UK in 2026?

The UK case, in short

UK solar isn't about abundant sunshine, it's about expensive grid electricity. At roughly 27p/kWh, every unit your panels produce and you use is 27p you don't spend. Add 0% VAT on residential installs (in place until 2027, worth £1,000-£3,000) and the Smart Export Guarantee paying you for surplus, and a typical system pays back in around 6-10 years, then runs largely free for another 15+.

What actually drives your payback

1. Your electricity price

The biggest lever. The higher your import rate, the more each self-consumed unit saves you. If your rate rises (as UK prices have), solar looks better, not worse.

2. How much you use during the day

This is the UK-specific twist. With no net metering, you save the full ~27p only on power you useas it's generated; exported surplus earns just your SEG rate (often ~13p). A household that's home in the daytime, runs appliances on a timer, or has a battery captures far more value than one that exports most of its generation.

3. Your region and roof

Sun varies from ~2.9 kWh/kW/day in the South West to ~2.25 in Scotland, a real but secondary effect. Roof orientation (south is best; east/west still fine) and shading matter as much as latitude.See generation by region.

4. Your SEG tariff

Export rates range from about 6p to 25p/kWh. Picking a good one, and pairing import and export sensibly, can shave a year or more off your payback. Compare current SEG tariffs.

When it's probably worth it

• You own your home, have a south/east/west-facing roof with little shading, and plan to stay 8+ years.
• You use a decent share of electricity in daylight, or you'll add a battery to store the surplus.
• You choose a competitive SEG tariff rather than defaulting to the lowest.

When to think twice

• Heavy shading, a north-only roof, or a roof due for replacement soon.
• You're out all day, export almost everything, and sit on a 6p SEG rate with no battery.
• You're moving within a few years and won't recoup the upfront cost.

The honest answer is "usually yes, if the roof and usage fit." Our calculator uses your region's real sun, 0% VAT pricing, and separate self-consumption and export values, so the payback you see reflects how a UK bill actually works.