Thinking about installing solar panels but unsure if it’s the right move? You’re not alone. Every week, thousands of UK homeowners explore solar energy — and nearly all of them start with the same questions. Here’s a straight-to-the-point guide answering the most common questions UK homeowners ask before going solar in 2025.
Do Solar Panels Work in the UK’s Cloudy Weather?
Yes. Solar panels generate electricity from daylight, not just direct sunlight. Even on cloudy or overcast days, panels can produce 10%–30% of their rated output — and far more on brighter days. Modern panels are designed to perform well in low-light conditions, making solar a practical solution across the UK, from Cornwall to the Highlands.
How Much Can I Save With Solar Panels?
Most UK homeowners save between £500 and £850 per year on electricity bills. If you install battery storage and qualify for export payments via the Smart Export Guarantee, annual savings can exceed £1,000. Your exact savings depend on your home’s electricity usage, system size, whether you use a solar battery, your daytime vs evening electricity habits, and your energy provider’s tariffs.
What’s the Payback Period for Solar Panels?
The average payback period in 2025 is 6 to 10 years. After that, most homeowners enjoy 15–20+ years of free electricity from their system. With rising electricity prices and 0% VAT on installations, breakeven points are now faster than ever.
Do I Get Paid for Extra Electricity?
Yes. The Smart Export Guarantee (SEG) pays you for every unit of electricity you export back to the grid. Rates vary by supplier, but most offer £0.04 to £0.15 per kWh. To qualify, you need an MCS-certified system, a smart meter that tracks export data, and registration with an SEG-compliant supplier.
How Much Do Solar Panels Cost?
In 2025, the cost of a standard 3.5kW solar system ranges from £5,000 to £7,000 installed. Larger systems such as 6kW–10kW may cost between £8,000 and £12,000. Adding a battery storage system can increase the total cost by £3,000 to £6,000 depending on capacity.
Can I Get Solar Panels for Free?
Not everyone qualifies, but some households can get solar panels fully funded through the government’s ECO4 scheme. This support is available to low-income households, homes with poor EPC ratings, and properties receiving certain benefits. You may also find local council grants or low-interest loans in your region.
Will Solar Panels Work With My Energy Provider?
Yes. Solar panels work independently of your energy supplier. However, to benefit from SEG export payments, you’ll need to register with a supplier that offers SEG tariffs. You don’t need to switch electricity supplier unless you want to get a better deal.
Do I Need Planning Permission?
For most homes, planning permission is not required. Solar panels are classed as a permitted development. Exceptions include listed buildings, homes in conservation areas or national parks, ground-mounted solar installations, and panels that protrude significantly from the roof. Always check with your local planning authority if unsure.
Will Solar Panels Increase My Property Value?
Yes. Solar panels can increase your home’s value by 5%–8%, especially if they improve your EPC rating. Homes with lower running costs and energy-efficient features are increasingly attractive to buyers. They also appeal to eco-conscious buyers looking for future-ready properties.
Do Solar Panels Need a Lot of Maintenance?
No. Solar panels are largely maintenance-free. They have no moving parts and come with 25+ year warranties. Basic care includes checking the system periodically via your app or monitor, occasional cleaning if panels get dirty (especially in urban or coastal areas), and professional check-ups every 5–10 years for system health.
Should I Install a Solar Battery?
A solar battery stores excess electricity for later use, usually at night. While not essential, batteries increase self-consumption of solar power, reduce reliance on the grid, help avoid high evening electricity rates, and provide backup during power cuts (with compatible inverters). They cost more upfront but can reduce bills by £200–£400 more per year.
Can I Install Solar Panels on a Flat Roof?
Yes. Many UK homes and extensions have flat roofs suitable for solar panels using angled mounting systems. These ensure optimal tilt and drainage. Installation costs may be slightly higher, but performance can be excellent with proper positioning.
What If I Sell My Home After Installing Solar?
Your solar panels stay with the property and can increase resale value. Buyers are often attracted by lower energy bills, a better EPC rating, and existing SEG registration. Ensure you keep documentation including the MCS certificate, inverter warranty, SEG registration details, and monitoring setup instructions.
Can I Install Solar Panels If I Rent My Home?
Tenants generally cannot install solar panels themselves, but you can speak to your landlord. Landlords may be interested in increasing EPC rating, reducing tenant complaints about energy bills, and adding value to the rental property. In some cases, landlords may be eligible for ECO4 or local funding schemes.
What Should I Look for in an Installer?
Choose an installer who is MCS-certified (Microgeneration Certification Scheme), provides clear fixed quotes, offers strong warranties on panels and inverters, has experience in your area and solid customer reviews, and will help register your system for SEG payments. Avoid cold callers or pressure sales tactics. Always get at least 3 quotes.
Final Thoughts
Solar panels are now a smart, long-term investment for UK homeowners. With modern systems performing well even in cloudy conditions, generous government support, and rising energy bills, 2025 is a great time to go solar. If you have a suitable roof, stable daytime usage, or are looking to boost your home’s value, solar could deliver decades of clean energy and meaningful savings. Start with a free, no-obligation quote from an MCS-certified installer to find out exactly what solar can do for your home.