Are solar panels worth it in the UK? (2026)
Solar panels still pay back in the UK — but the answer depends on your roof, your tariff and how much electricity you actually use during the day. Use the calculator to model your specific situation, then read the FAQ for the honest verdict.
Frequently asked questions
How long do solar panels take to pay back in the UK?
Most UK homes hit payback in 7–11 years on a south-facing roof at typical install costs of £6–9k for a 4kWp system. South-East/South-West is similar; pure east/west adds 1–2 years.
Are solar panels worth it without a battery?
Yes if you're home during the day or have an EV charging in daylight. Without a battery you'll export 50–70% of generation at the SEG rate, which is much lower than the rate you'd pay to buy electricity.
What about cloudy days?
UK panels still generate ~10–20% of peak on overcast days. Annual generation accounts for cloud — the figures from the calculator are net, not theoretical maximum.