Solar Guides for UK Homes

Solar Panel Costs & Savings

What solar actually costs in the UK by system size, whether it pays back, and what the Smart Export Guarantee pays you for exported power.

• SEG vs Feed-in Tariff: What Changed and What You Get Paid Now (2026)The Feed-in Tariff closed to new applicants on 31 March 2019 and the Smart Export Guarantee replaced it. FiT paid government-set rates for 10 to 25 years; SEG rates are set by suppliers and ranged from about 3p to 18p per kWh in July 2026. How the schemes compare, and what to do if you still get FiT payments.
• Solar Panel Grants UK: What Actually Exists in 2026There is no universal UK solar grant. What does exist in 2026: fully funded solar for low-income homes under the Warm Homes Plan, ECO4 until December 2026, free installs via Nest in Wales, plus 0% VAT and SEG payments for everyone else.
• Solar Battery Storage UK: Costs, Savings and Payback (2026)A home storage battery costs £1,500 to £10,000 in the UK, with a typical 5kWh unit around £4,600 per the Energy Saving Trust. What a battery adds to a solar install, the 0% VAT position until March 2027, and the honest payback maths.
• Best Solar Panel Installers UK: How to Choose (MCS Explained)How to pick a solar installer in the UK without getting stung. The MCS certificate is the one non-negotiable, RECC and HIES protect your money, and here are the red flags to walk away from.
• Smart Export Guarantee Rates Compared (2026)SEG export rates run from about 3p to 18p per kWh in 2026, and your supplier sets the number, not the government. Here are the current rates from Octopus, E.ON Next, EDF and British Gas, and what the small print costs you.
• Are Solar Panels Worth It in the UK? (2026)For most UK homes with an unshaded roof, yes, but payback runs 9 to 12 years, not the 5 the sales pitch implies. Here is the honest arithmetic on costs, savings and the homes where solar does not pay.
• 0% VAT on Solar Panels: The 2027 Deadline and What Happens AfterSolar panel installation is zero-rated for VAT across the UK until 31 March 2027, then reverts to 5%, not 20%. What the relief covers, the supply-and-install catch, and what the deadline is actually worth on a typical system.
• Do You Need Planning Permission for Solar Panels? Permitted Development by NationRooftop solar is usually permitted development across the UK, but the limits are different in England, Wales, Scotland and Northern Ireland. The projection limits, flat-roof rules, conservation area traps and listed building position, verified against each nation's own source.
• G98 and G99 Explained: Connecting Solar Panels to the Grid (2026)G98 covers solar systems rated under 16A per phase, which is 3.68kW per phase: you fit first and notify the DNO within 28 days. Above that it is G99 and you apply before connecting. What the thresholds mean, who fills in the forms, and why Northern Ireland runs a separate process.
• Solar Panel Installation Cost by System Size: 3kW to 6kW ComparedA 4kW solar system typically costs £5,500 to £7,000 installed, a 6kW system £8,500 to £10,500. Compare cost, panel count, roof space and output by system size, and work out which size suits your home.
• How Many Solar Panels Do You Need? Panels, Roof Space and UsageMost UK homes need between 6 and 13 solar panels. Work out your own panel count from your annual kWh, using Ofgem's July 2026 consumption figures, and check it against your usable roof space.
• Do Solar Panels Add Value to Your House? What the UK Evidence ShowsPeer-reviewed analysis of five million UK listings found a 6.1% to 7.1% sale price premium for homes with solar panels. Here is what that evidence does and does not prove, and why a rent-a-roof lease can cost you a buyer.
• Do Solar Panels Work in Winter? UK Output Season by SeasonYes, but a UK solar system produces roughly a quarter as much in the winter quarters as in the summer ones. Government load factor data, Met Office sunshine hours and what the seasonal swing means for your bills, battery and export payments.
• Which Direction Should Solar Panels Face? UK Roof Orientation GuideSouth is best, but east or west roofs still work and lose only around 15 to 20% against due south. What MCS actually measures, why north facing roofs are the one direction to rule out, and how to check your quote used your real roof orientation.
• Plug-In Solar Panels UK: The New Rules From 27 August 2026Plug-in solar becomes legal in the UK on 27 August 2026 under SI 2026/848. What the 800VA limit, the one-per-circuit rule and the battery exclusion actually mean, why you have to notify your network operator, and why exported power earns you nothing.
• Solar Panel Installation Process UK: How Long Does It Take?The panels go on in one to two days, but the process runs from survey to switch-on. What happens on installation day, when the scaffolding arrives, the MCS certificate you should get within 10 working days, the grid notification, and when export payments actually start.
• How Do Solar Panels Work? A UK Homeowner's GuideSunlight hits silicon, the cells make direct current, an inverter turns it into the alternating current your house runs on. Here is the full chain, what kWp really means, and why UK panels shut down in a power cut.
• Solar Roof Tiles UK: Costs, Rules and How They Compare to PanelsSolar roof tiles replace your roof covering instead of sitting on top of it. No official UK source publishes a typical price, and the certification question decides whether you get paid for exporting. Here is what is actually verifiable.
• How Long Do Solar Panels Last? Lifespan, Degradation and the InverterThe Energy Saving Trust says UK solar panels should last 25 years or more, but the inverter needs replacing after around 12 years. Here is what fails first, what your warranty actually covers by then, and what it costs you.
• Solar Inverters UK: String, Hybrid and Microinverters ComparedThe inverter decides how your solar system handles shade, whether a battery fits later, and which grid application your installer has to make. Here is how string, hybrid and microinverter setups differ on a UK roof, and the 16A rule that catches people out.
• Solar Panel Types UK: Monocrystalline, Polycrystalline and Thin FilmSolar panel types explained for UK homes: what monocrystalline, polycrystalline and thin film actually mean in the MCS product standard, why bifacial panels are rated on a different test, and which of these differences genuinely changes your quote.
• Solar Panel Efficiency UK: What the Percentage Actually ChangesSolar panel efficiency decides how much power fits in a square metre of roof, not how much electricity you get from a given system size. MCS certified panels run from about 19.5% to 24%. Here is what that gap is really worth on a UK roof.
• Ground-Mounted Solar Panels UK: Cost, Planning Rules and When They Beat a RoofGround-mounted solar panels can outperform a roof install if you have the space, but the permitted development allowance is small: 9 square metres in England and Wales, about four panels. What they cost, the planning rules in all four UK nations, and when a garden array makes sense.
• Solar Panel Finance UK: What Borrowing to Pay for Solar Really CostsBorrowing to pay for solar does not change the price of the system, it changes the payback. At the Bank of England's June 2026 average rate for new personal loans, a £7,600 install on a five-year loan costs £9,525 and pays back around two years later. The full maths, plus the rules your installer must follow.
• Solar Panels on a Flat Roof: UK Rules, Mounting and Costs (2026)Yes, you can put solar panels on a flat roof, and the roof is rarely the problem. What decides the job is how the array is held down. MCS rewrote those rules in March 2026, and in England the 0.6 metre planning limit quietly sets your tilt angle. The full detail, with the arithmetic.
• In-Roof Solar Panels UK: Costs, Rules and When They Are Worth It (2026)In-roof solar panels replace part of your roof covering instead of sitting on top of it. They look better, they cost more on an existing roof, and MCS tests them far harder than standard on-roof systems. What that means for your quote, verified against the current standards.
• Solar Panels and a New Roof: Do You Need to Re-Roof First? (UK 2026)No UK standard says you need a new roof before solar panels. What MCS does require is a structural check, and the number that decides it is what your roof covering weighs. The arithmetic, the building regulations bill, and the VAT trap on doing both jobs at once.
• Solar Panel Maintenance UK: The Real Schedule and What It Costs (2026)MCS publishes an actual maintenance schedule for UK solar panels, and for a privately owned home it asks for far less than the servicing plans being sold to you. The frequencies from Appendix F, the Energy Saving Trust's cleaning costs, and the warranty clause that catches people out.
• Solar Power Diverter UK: The Hot Water Maths Nobody Shows You (2026)A solar power diverter sends surplus solar electricity to your immersion heater instead of the grid. Whether that makes or loses you money depends entirely on how you heat water now. The arithmetic, at today's Ofgem cap and today's export rates.
• Solar Panel Recycling UK: What Happens to Old Panels (2026)Solar panels have a legal recycling route in the UK under the WEEE Regulations 2013. Producers pay, homeowners drop off free. Here is how it works and when it applies to you.
• Solar Panel Fire Risk UK: What the Data Actually Shows (2026)UK fire services attended 212 fires involving solar panels in 2025, up from 91 in 2022. Set against 1.93 million installations, that is roughly 1 in 9,100 a year. Here is the real rate, the components that fail, and what to check on your quote.
• Solar Panels Cost UK: What to Expect in 2026A typical UK solar panel system costs around £7,600 for a 4.5kWp install. This guide covers cost by system size, 0% VAT, SEG export rates, payback periods, and what grants actually exist.