Do solar panels work on cloudy days?
Quick answer: Yes, modern panels generate electricity even on cloudy days, just at reduced output.
Solar Panels and UK Weather
A common concern for UK homeowners is whether solar panels work in our often-cloudy climate. The answer is a definite yes — and here's why.
How Panels Work in Clouds
Solar panels convert light into electricity, not heat. Even on overcast days, significant light reaches your panels through the clouds. This is called "diffuse light" and modern panels are specifically designed to capture it efficiently.
Performance in Different Conditions
- Bright sunny day: 100% of rated output
- Light cloud cover: 50-70% of rated output
- Overcast day: 20-40% of rated output
- Heavy cloud/rain: 10-25% of rated output
UK Solar Performance
The UK receives enough solar radiation to make solar panels highly effective. Germany, which has similar levels of sunlight, is the world's fourth largest solar energy producer, proving that UK conditions are more than adequate.
Year-Round Generation
While summer months produce more electricity, solar panels generate power year-round. A well-designed system accounts for seasonal variation to maximise your annual savings.
Still have questions?
Talk to a local MCS-certified installer — free, friendly, no pressure.
Ready for a free quote?
Free survey, fixed-price quote within 24 hours, no high-pressure sales.
Complete solar & battery packages
Fixed prices, supply and installation included. Every package is MCS certified and comes with our 2-year workmanship guarantee.
- 3.84kW · 8 panels£5,995
- 8 × LONGi 480W all-black
- Fox ESS 3.68kW hybrid inverter
- Fox ESS EP6 — 5.76kWh storage
- 5.76kW · 12 panels£6,995
- 12 × LONGi 480W all-black
- Fox ESS 5.0kW hybrid inverter
- Fox ESS EP6 — 5.76kWh storage
- 7.68kW · 16 panels£7,995
- 16 × LONGi 480W all-black
- Fox ESS KH7 hybrid inverter
- Fox ESS EP6 — 5.76kWh storage
Upgrade any package to the Fox ESS EP12 (11.52kWh) for £995.
All package prices assume every panel fits on a single roof elevation. The price covers the cost of scaffolding to one elevation. If your roof needs scaffolding on more than one elevation, or has restricted access, that additional cost is quoted separately after survey. Prices include VAT. Domestic solar and battery storage is zero-rated for VAT until 31 March 2027. Subject to a free technical survey. We will confirm the final price in writing before any work is booked.